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<li class="toctree-l4"><a class="reference internal" href="#create-initial-map-from-cwa">4 Create Initial Map From CWA</a></li>
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<li class="toctree-l4"><a class="reference internal" href="#draw-nearby-lakes">8 Draw Nearby Lakes</a></li>
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<li class="toctree-l4"><a class="reference internal" href="#draw-major-rivers">9 Draw Major Rivers</a></li>
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<li class="toctree-l4"><a class="reference internal" href="#draw-topography">10 Draw Topography</a></li>
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<section id="map-resources-and-topography">
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<h1>Map Resources and Topography<a class="headerlink" href="#map-resources-and-topography" title="Permalink to this heading"></a></h1>
|
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<p><a class="reference external" href="http://nbviewer.ipython.org/github/Unidata/python-awips/blob/master/examples/notebooks/Map_Resources_and_Topography.ipynb">Notebook</a>
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Python-AWIPS Tutorial Notebook</p>
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<hr class="docutils" />
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<section id="objectives">
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<h2>Objectives<a class="headerlink" href="#objectives" title="Permalink to this heading"></a></h2>
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<ul class="simple">
|
||
<li><p>Use python-awips to connect to an edex server</p></li>
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<li><p>Define data request object specifically for the maps database</p></li>
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<li><p>Manipulate request object for various different map resources</p></li>
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<li><p>Plot map resources in combination with one another for geographical
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context</p></li>
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</ul>
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<hr class="docutils" />
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<section id="table-of-contents">
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<h3>Table of Contents<a class="headerlink" href="#table-of-contents" title="Permalink to this heading"></a></h3>
|
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<div class="line-block">
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<div class="line"><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html#imports">1
|
||
Imports</a></div>
|
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<div class="line"><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html#connect-to-edex">2 Connect to
|
||
EDEX</a></div>
|
||
<div class="line"><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html#function-make-map">3 Function:
|
||
make_map()</a></div>
|
||
<div class="line"><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html#create-initial-map-from-cwa">4 Create Initial Map From
|
||
CWA</a></div>
|
||
<div class="line"><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html#draw-merged-cwa">5 Draw Merged
|
||
CWA</a></div>
|
||
<div class="line"><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html#draw-interstates-using-boundary-filter">6 Draw Interstates using Boundary
|
||
Filter</a></div>
|
||
<div class="line"><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html#draw-nearby-cities">7 Draw Nearby
|
||
Cities</a></div>
|
||
<div class="line"><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html#draw-nearby-lakes">8 Draw Nearby
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||
Lakes</a></div>
|
||
<div class="line"><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html#draw-major-rivers">9 Draw Major
|
||
Rivers</a></div>
|
||
<div class="line"><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html#draw-topography">10 Draw
|
||
Topography</a></div>
|
||
<div class="line"><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html#see-also">11 See
|
||
Also</a></div>
|
||
<div class="line"> <a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html#additional-documentation">11.1 Additional
|
||
Documentation</a></div>
|
||
</div>
|
||
</section>
|
||
<section id="imports">
|
||
<h3>1 Imports<a class="headerlink" href="#imports" title="Permalink to this heading"></a></h3>
|
||
<p>The imports below are used throughout the notebook. Note the first
|
||
import is coming directly from python-awips and allows us to connect to
|
||
an EDEX server. The subsequent imports are for data manipulation and
|
||
visualization.</p>
|
||
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">awips.dataaccess</span> <span class="kn">import</span> <span class="n">DataAccessLayer</span>
|
||
<span class="kn">import</span> <span class="nn">matplotlib.pyplot</span> <span class="k">as</span> <span class="nn">plt</span>
|
||
<span class="kn">import</span> <span class="nn">cartopy.crs</span> <span class="k">as</span> <span class="nn">ccrs</span>
|
||
<span class="kn">import</span> <span class="nn">numpy.ma</span> <span class="k">as</span> <span class="nn">ma</span>
|
||
<span class="kn">from</span> <span class="nn">cartopy.mpl.gridliner</span> <span class="kn">import</span> <span class="n">LONGITUDE_FORMATTER</span><span class="p">,</span> <span class="n">LATITUDE_FORMATTER</span>
|
||
<span class="kn">from</span> <span class="nn">cartopy.feature</span> <span class="kn">import</span> <span class="n">ShapelyFeature</span><span class="p">,</span><span class="n">NaturalEarthFeature</span>
|
||
<span class="kn">from</span> <span class="nn">shapely.ops</span> <span class="kn">import</span> <span class="n">cascaded_union</span>
|
||
</pre></div>
|
||
</div>
|
||
<p><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html">Top</a></p>
|
||
</section>
|
||
<hr class="docutils" />
|
||
<section id="connect-to-edex">
|
||
<h3>2 Connect to EDEX<a class="headerlink" href="#connect-to-edex" title="Permalink to this heading"></a></h3>
|
||
<p>First we establish a connection to Unidata’s public EDEX server. With
|
||
that connection made, we can create a <a class="reference external" href="http://unidata.github.io/python-awips/api/IDataRequest.html">new data request
|
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object</a>
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and set the data type to <strong>maps</strong>.</p>
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<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="c1"># Server, Data Request Type, and Database Table</span>
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||
<span class="n">DataAccessLayer</span><span class="o">.</span><span class="n">changeEDEXHost</span><span class="p">(</span><span class="s2">"edex-cloud.unidata.ucar.edu"</span><span class="p">)</span>
|
||
<span class="n">request</span> <span class="o">=</span> <span class="n">DataAccessLayer</span><span class="o">.</span><span class="n">newDataRequest</span><span class="p">(</span><span class="s1">'maps'</span><span class="p">)</span>
|
||
</pre></div>
|
||
</div>
|
||
<p><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html">Top</a></p>
|
||
</section>
|
||
<hr class="docutils" />
|
||
<section id="function-make-map">
|
||
<h3>3 Function: make_map()<a class="headerlink" href="#function-make-map" title="Permalink to this heading"></a></h3>
|
||
<p>In many of our notebooks we end up plotting map images, and this logic
|
||
below is the same from those other notebooks. Typically, functions are
|
||
defined when they are called multiple times throughout a notebook. In
|
||
this case, we only use it in one code block cell, but because it is a
|
||
common function from several of our notebooks, it’s nice to keep the
|
||
logic neatly defined for consistency.</p>
|
||
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="c1"># Standard map plot</span>
|
||
<span class="k">def</span> <span class="nf">make_map</span><span class="p">(</span><span class="n">bbox</span><span class="p">,</span> <span class="n">projection</span><span class="o">=</span><span class="n">ccrs</span><span class="o">.</span><span class="n">PlateCarree</span><span class="p">()):</span>
|
||
<span class="n">fig</span><span class="p">,</span> <span class="n">ax</span> <span class="o">=</span> <span class="n">plt</span><span class="o">.</span><span class="n">subplots</span><span class="p">(</span><span class="n">figsize</span><span class="o">=</span><span class="p">(</span><span class="mi">12</span><span class="p">,</span><span class="mi">12</span><span class="p">),</span>
|
||
<span class="n">subplot_kw</span><span class="o">=</span><span class="nb">dict</span><span class="p">(</span><span class="n">projection</span><span class="o">=</span><span class="n">projection</span><span class="p">))</span>
|
||
<span class="n">ax</span><span class="o">.</span><span class="n">set_extent</span><span class="p">(</span><span class="n">bbox</span><span class="p">)</span>
|
||
<span class="n">ax</span><span class="o">.</span><span class="n">coastlines</span><span class="p">(</span><span class="n">resolution</span><span class="o">=</span><span class="s1">'50m'</span><span class="p">)</span>
|
||
<span class="n">gl</span> <span class="o">=</span> <span class="n">ax</span><span class="o">.</span><span class="n">gridlines</span><span class="p">(</span><span class="n">draw_labels</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
|
||
<span class="n">gl</span><span class="o">.</span><span class="n">top_labels</span> <span class="o">=</span> <span class="n">gl</span><span class="o">.</span><span class="n">right_labels</span> <span class="o">=</span> <span class="kc">False</span>
|
||
<span class="n">gl</span><span class="o">.</span><span class="n">xformatter</span> <span class="o">=</span> <span class="n">LONGITUDE_FORMATTER</span>
|
||
<span class="n">gl</span><span class="o">.</span><span class="n">yformatter</span> <span class="o">=</span> <span class="n">LATITUDE_FORMATTER</span>
|
||
<span class="k">return</span> <span class="n">fig</span><span class="p">,</span> <span class="n">ax</span>
|
||
</pre></div>
|
||
</div>
|
||
<p><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html">Top</a></p>
|
||
</section>
|
||
<hr class="docutils" />
|
||
<section id="create-initial-map-from-cwa">
|
||
<h3>4 Create Initial Map From CWA<a class="headerlink" href="#create-initial-map-from-cwa" title="Permalink to this heading"></a></h3>
|
||
<p>The python-awips package provides access to the entire AWIPS Maps
|
||
Database for use in Python GIS applications. Map objects are returned as
|
||
Shapely geometries and can be easily plotted by many Python packages.</p>
|
||
<ul class="simple">
|
||
<li><p>Each map database table has a geometry field called <code class="docutils literal notranslate"><span class="pre">the_geom</span></code>,
|
||
which can be used to spatially select map resources for any column of
|
||
type geometry.</p></li>
|
||
</ul>
|
||
<blockquote>
|
||
<div><p><strong>Tip</strong>: Note the geometry definition of <code class="docutils literal notranslate"><span class="pre">the_geom</span></code> for each data
|
||
type, which can be <strong>Point</strong>, <strong>MultiPolygon</strong>, or
|
||
<strong>MultiLineString</strong>.</p>
|
||
</div></blockquote>
|
||
<p>Here we’ll be using Boulder (BOU) as our example for plotting the County
|
||
Warning Area (CWA). We’ll query our EDEX server to get all counties in
|
||
the CWA for BOU, and then plot those counties along withe the state
|
||
boundaries and lines of longitude and latitude. In order to get this
|
||
information from EDEX, we’ll need to set several characteristics on our
|
||
data request object. We will use
|
||
<a class="reference external" href="http://unidata.github.io/python-awips/api/IDataRequest.html#awips.dataaccess.IDataRequest.setParameters">request.setParameters()</a>
|
||
to refine our query to EDEX.</p>
|
||
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="c1"># Specify the necessary identifiers for requesting the Boulder CWA</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">addIdentifier</span><span class="p">(</span><span class="s1">'table'</span><span class="p">,</span> <span class="s1">'mapdata.county'</span><span class="p">)</span>
|
||
<span class="c1"># Define a WFO ID for location</span>
|
||
<span class="c1"># tie this ID to the mapdata.county column "cwa" for filtering</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">setLocationNames</span><span class="p">(</span><span class="s1">'BOU'</span><span class="p">)</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">addIdentifier</span><span class="p">(</span><span class="s1">'cwa'</span><span class="p">,</span> <span class="s1">'BOU'</span><span class="p">)</span>
|
||
<span class="c1"># enable location filtering (inLocation)</span>
|
||
<span class="c1"># locationField is tied to the above cwa definition (BOU)</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">addIdentifier</span><span class="p">(</span><span class="s1">'geomField'</span><span class="p">,</span> <span class="s1">'the_geom'</span><span class="p">)</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">addIdentifier</span><span class="p">(</span><span class="s1">'inLocation'</span><span class="p">,</span> <span class="s1">'true'</span><span class="p">)</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">addIdentifier</span><span class="p">(</span><span class="s1">'locationField'</span><span class="p">,</span> <span class="s1">'cwa'</span><span class="p">)</span>
|
||
|
||
<span class="c1"># Get response and create dict of county geometries</span>
|
||
<span class="n">response</span> <span class="o">=</span> <span class="n">DataAccessLayer</span><span class="o">.</span><span class="n">getGeometryData</span><span class="p">(</span><span class="n">request</span><span class="p">)</span>
|
||
<span class="n">counties</span> <span class="o">=</span> <span class="p">[]</span>
|
||
<span class="k">for</span> <span class="n">ob</span> <span class="ow">in</span> <span class="n">response</span><span class="p">:</span>
|
||
<span class="n">counties</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">ob</span><span class="o">.</span><span class="n">getGeometry</span><span class="p">())</span>
|
||
<span class="nb">print</span><span class="p">(</span><span class="s2">"Using "</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">counties</span><span class="p">))</span> <span class="o">+</span> <span class="s2">" county MultiPolygons"</span><span class="p">)</span>
|
||
|
||
|
||
<span class="c1"># All WFO counties merged to a single Polygon</span>
|
||
<span class="n">merged_counties</span> <span class="o">=</span> <span class="n">cascaded_union</span><span class="p">(</span><span class="n">counties</span><span class="p">)</span>
|
||
<span class="n">envelope</span> <span class="o">=</span> <span class="n">merged_counties</span><span class="o">.</span><span class="n">buffer</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
|
||
<span class="n">boundaries</span><span class="o">=</span><span class="p">[</span><span class="n">merged_counties</span><span class="p">]</span>
|
||
|
||
<span class="c1"># Get bounds of this merged Polygon to use as buffered map extent</span>
|
||
<span class="n">bounds</span> <span class="o">=</span> <span class="n">merged_counties</span><span class="o">.</span><span class="n">bounds</span>
|
||
<span class="n">bbox</span><span class="o">=</span><span class="p">[</span><span class="n">bounds</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">-</span><span class="mi">1</span><span class="p">,</span><span class="n">bounds</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span><span class="o">+</span><span class="mi">1</span><span class="p">,</span><span class="n">bounds</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="o">-</span><span class="mf">1.5</span><span class="p">,</span><span class="n">bounds</span><span class="p">[</span><span class="mi">3</span><span class="p">]</span><span class="o">+</span><span class="mf">1.5</span><span class="p">]</span>
|
||
|
||
<span class="c1"># Create the map we'll use for the rest of this notebook based on the</span>
|
||
<span class="c1"># boundaries of the CWA</span>
|
||
<span class="n">fig</span><span class="p">,</span> <span class="n">ax</span> <span class="o">=</span> <span class="n">make_map</span><span class="p">(</span><span class="n">bbox</span><span class="o">=</span><span class="n">bbox</span><span class="p">)</span>
|
||
|
||
<span class="c1"># Plot political/state boundaries handled by Cartopy</span>
|
||
<span class="n">political_boundaries</span> <span class="o">=</span> <span class="n">NaturalEarthFeature</span><span class="p">(</span><span class="n">category</span><span class="o">=</span><span class="s1">'cultural'</span><span class="p">,</span>
|
||
<span class="n">name</span><span class="o">=</span><span class="s1">'admin_0_boundary_lines_land'</span><span class="p">,</span>
|
||
<span class="n">scale</span><span class="o">=</span><span class="s1">'50m'</span><span class="p">,</span> <span class="n">facecolor</span><span class="o">=</span><span class="s1">'none'</span><span class="p">)</span>
|
||
<span class="n">states</span> <span class="o">=</span> <span class="n">NaturalEarthFeature</span><span class="p">(</span><span class="n">category</span><span class="o">=</span><span class="s1">'cultural'</span><span class="p">,</span>
|
||
<span class="n">name</span><span class="o">=</span><span class="s1">'admin_1_states_provinces_lines'</span><span class="p">,</span>
|
||
<span class="n">scale</span><span class="o">=</span><span class="s1">'50m'</span><span class="p">,</span> <span class="n">facecolor</span><span class="o">=</span><span class="s1">'none'</span><span class="p">)</span>
|
||
<span class="n">ax</span><span class="o">.</span><span class="n">add_feature</span><span class="p">(</span><span class="n">political_boundaries</span><span class="p">,</span> <span class="n">linestyle</span><span class="o">=</span><span class="s1">'-'</span><span class="p">,</span> <span class="n">edgecolor</span><span class="o">=</span><span class="s1">'black'</span><span class="p">)</span>
|
||
<span class="n">ax</span><span class="o">.</span><span class="n">add_feature</span><span class="p">(</span><span class="n">states</span><span class="p">,</span> <span class="n">linestyle</span><span class="o">=</span><span class="s1">'-'</span><span class="p">,</span> <span class="n">edgecolor</span><span class="o">=</span><span class="s1">'black'</span><span class="p">,</span><span class="n">linewidth</span><span class="o">=</span><span class="mi">2</span><span class="p">)</span>
|
||
|
||
<span class="c1"># Plot CWA counties</span>
|
||
<span class="n">shape_feature</span> <span class="o">=</span> <span class="n">ShapelyFeature</span><span class="p">(</span><span class="n">counties</span><span class="p">,</span><span class="n">ccrs</span><span class="o">.</span><span class="n">PlateCarree</span><span class="p">(),</span>
|
||
<span class="n">facecolor</span><span class="o">=</span><span class="s1">'none'</span><span class="p">,</span> <span class="n">linestyle</span><span class="o">=</span><span class="s2">"-"</span><span class="p">,</span><span class="n">edgecolor</span><span class="o">=</span><span class="s1">'#86989B'</span><span class="p">)</span>
|
||
<span class="n">ax</span><span class="o">.</span><span class="n">add_feature</span><span class="p">(</span><span class="n">shape_feature</span><span class="p">)</span>
|
||
</pre></div>
|
||
</div>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">Using</span> <span class="mi">22</span> <span class="n">county</span> <span class="n">MultiPolygons</span>
|
||
</pre></div>
|
||
</div>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o"><</span><span class="n">cartopy</span><span class="o">.</span><span class="n">mpl</span><span class="o">.</span><span class="n">feature_artist</span><span class="o">.</span><span class="n">FeatureArtist</span> <span class="n">at</span> <span class="mh">0x11568f6d0</span><span class="o">></span>
|
||
</pre></div>
|
||
</div>
|
||
<img alt="../../_images/Map_Resources_and_Topography_13_2.png" src="../../_images/Map_Resources_and_Topography_13_2.png" />
|
||
<p><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html">Top</a></p>
|
||
</section>
|
||
<hr class="docutils" />
|
||
<section id="draw-merged-cwa">
|
||
<h3>5 Draw Merged CWA<a class="headerlink" href="#draw-merged-cwa" title="Permalink to this heading"></a></h3>
|
||
<p>In the previous section we created a merged polygon with the applicable
|
||
counties. Here, we draw this new shape on top of our existing map in a
|
||
burnt orange color.</p>
|
||
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="c1"># Plot CWA envelope</span>
|
||
<span class="n">shape_feature</span> <span class="o">=</span> <span class="n">ShapelyFeature</span><span class="p">(</span><span class="n">boundaries</span><span class="p">,</span><span class="n">ccrs</span><span class="o">.</span><span class="n">PlateCarree</span><span class="p">(),</span>
|
||
<span class="n">facecolor</span><span class="o">=</span><span class="s1">'none'</span><span class="p">,</span> <span class="n">linestyle</span><span class="o">=</span><span class="s2">"-"</span><span class="p">,</span><span class="n">linewidth</span><span class="o">=</span><span class="mf">3.</span><span class="p">,</span><span class="n">edgecolor</span><span class="o">=</span><span class="s1">'#cc5000'</span><span class="p">)</span>
|
||
<span class="n">ax</span><span class="o">.</span><span class="n">add_feature</span><span class="p">(</span><span class="n">shape_feature</span><span class="p">)</span>
|
||
|
||
<span class="n">fig</span>
|
||
</pre></div>
|
||
</div>
|
||
<img alt="../../_images/Map_Resources_and_Topography_16_0.png" src="../../_images/Map_Resources_and_Topography_16_0.png" />
|
||
<p><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html">Top</a></p>
|
||
</section>
|
||
<hr class="docutils" />
|
||
<section id="draw-interstates-using-boundary-filter">
|
||
<h3>6 Draw Interstates using Boundary Filter<a class="headerlink" href="#draw-interstates-using-boundary-filter" title="Permalink to this heading"></a></h3>
|
||
<p>Now, we’ll use the previously-defined
|
||
<strong>envelope=merged_counties.buffer(2)</strong> in a <strong>newDataRequest()</strong> to
|
||
request interstate geometries which fall inside the buffered boundary.</p>
|
||
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="c1"># Define the request for the interstate query</span>
|
||
<span class="n">request</span> <span class="o">=</span> <span class="n">DataAccessLayer</span><span class="o">.</span><span class="n">newDataRequest</span><span class="p">(</span><span class="s1">'maps'</span><span class="p">,</span> <span class="n">envelope</span><span class="o">=</span><span class="n">envelope</span><span class="p">)</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">addIdentifier</span><span class="p">(</span><span class="s1">'table'</span><span class="p">,</span> <span class="s1">'mapdata.interstate'</span><span class="p">)</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">addIdentifier</span><span class="p">(</span><span class="s1">'geomField'</span><span class="p">,</span> <span class="s1">'the_geom'</span><span class="p">)</span>
|
||
<span class="n">interstates</span> <span class="o">=</span> <span class="n">DataAccessLayer</span><span class="o">.</span><span class="n">getGeometryData</span><span class="p">(</span><span class="n">request</span><span class="p">)</span>
|
||
<span class="nb">print</span><span class="p">(</span><span class="s2">"Using "</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">interstates</span><span class="p">))</span> <span class="o">+</span> <span class="s2">" interstate MultiLineStrings"</span><span class="p">)</span>
|
||
|
||
<span class="c1"># Plot interstates</span>
|
||
<span class="k">for</span> <span class="n">ob</span> <span class="ow">in</span> <span class="n">interstates</span><span class="p">:</span>
|
||
<span class="n">shape_feature</span> <span class="o">=</span> <span class="n">ShapelyFeature</span><span class="p">(</span><span class="n">ob</span><span class="o">.</span><span class="n">getGeometry</span><span class="p">(),</span><span class="n">ccrs</span><span class="o">.</span><span class="n">PlateCarree</span><span class="p">(),</span>
|
||
<span class="n">facecolor</span><span class="o">=</span><span class="s1">'none'</span><span class="p">,</span> <span class="n">linestyle</span><span class="o">=</span><span class="s2">"-"</span><span class="p">,</span><span class="n">edgecolor</span><span class="o">=</span><span class="s1">'orange'</span><span class="p">)</span>
|
||
<span class="n">ax</span><span class="o">.</span><span class="n">add_feature</span><span class="p">(</span><span class="n">shape_feature</span><span class="p">)</span>
|
||
<span class="n">fig</span>
|
||
</pre></div>
|
||
</div>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">Using</span> <span class="mi">225</span> <span class="n">interstate</span> <span class="n">MultiLineStrings</span>
|
||
</pre></div>
|
||
</div>
|
||
<img alt="../../_images/Map_Resources_and_Topography_19_1.png" src="../../_images/Map_Resources_and_Topography_19_1.png" />
|
||
<p><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html">Top</a></p>
|
||
</section>
|
||
<hr class="docutils" />
|
||
<section id="draw-nearby-cities">
|
||
<h3>7 Draw Nearby Cities<a class="headerlink" href="#draw-nearby-cities" title="Permalink to this heading"></a></h3>
|
||
<p>Request the city table based using the <strong>envelope</strong> attribute and filter
|
||
by population and progressive disclosure level.</p>
|
||
<blockquote>
|
||
<div><p><strong>Warning</strong>: The <code class="docutils literal notranslate"><span class="pre">prog_disc</span></code> field is not entirely understood and
|
||
values appear to change significantly depending on WFO site.</p>
|
||
</div></blockquote>
|
||
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="c1"># Define the request for the city query</span>
|
||
<span class="n">request</span> <span class="o">=</span> <span class="n">DataAccessLayer</span><span class="o">.</span><span class="n">newDataRequest</span><span class="p">(</span><span class="s1">'maps'</span><span class="p">,</span> <span class="n">envelope</span><span class="o">=</span><span class="n">envelope</span><span class="p">)</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">addIdentifier</span><span class="p">(</span><span class="s1">'table'</span><span class="p">,</span> <span class="s1">'mapdata.city'</span><span class="p">)</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">addIdentifier</span><span class="p">(</span><span class="s1">'geomField'</span><span class="p">,</span> <span class="s1">'the_geom'</span><span class="p">)</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">setParameters</span><span class="p">(</span><span class="s1">'name'</span><span class="p">,</span><span class="s1">'population'</span><span class="p">,</span><span class="s1">'prog_disc'</span><span class="p">)</span>
|
||
<span class="n">cities</span> <span class="o">=</span> <span class="n">DataAccessLayer</span><span class="o">.</span><span class="n">getGeometryData</span><span class="p">(</span><span class="n">request</span><span class="p">)</span>
|
||
<span class="nb">print</span><span class="p">(</span><span class="s2">"Queried "</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">cities</span><span class="p">))</span> <span class="o">+</span> <span class="s2">" total cities"</span><span class="p">)</span>
|
||
|
||
<span class="c1"># Set aside two arrays - one for the geometry of the cities and one for their names</span>
|
||
<span class="n">citylist</span> <span class="o">=</span> <span class="p">[]</span>
|
||
<span class="n">cityname</span> <span class="o">=</span> <span class="p">[]</span>
|
||
<span class="c1"># For BOU, progressive disclosure values above 50 and pop above 5000 looks good</span>
|
||
<span class="k">for</span> <span class="n">ob</span> <span class="ow">in</span> <span class="n">cities</span><span class="p">:</span>
|
||
<span class="k">if</span> <span class="n">ob</span><span class="o">.</span><span class="n">getString</span><span class="p">(</span><span class="s2">"population"</span><span class="p">)</span> <span class="o">!=</span> <span class="s1">'None'</span><span class="p">:</span>
|
||
<span class="k">if</span> <span class="n">ob</span><span class="o">.</span><span class="n">getNumber</span><span class="p">(</span><span class="s2">"prog_disc"</span><span class="p">)</span> <span class="o">></span> <span class="mi">50</span> <span class="ow">and</span> <span class="nb">int</span><span class="p">(</span><span class="n">ob</span><span class="o">.</span><span class="n">getString</span><span class="p">(</span><span class="s2">"population"</span><span class="p">))</span> <span class="o">></span> <span class="mi">5000</span><span class="p">:</span>
|
||
<span class="n">citylist</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">ob</span><span class="o">.</span><span class="n">getGeometry</span><span class="p">())</span>
|
||
<span class="n">cityname</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">ob</span><span class="o">.</span><span class="n">getString</span><span class="p">(</span><span class="s2">"name"</span><span class="p">))</span>
|
||
<span class="nb">print</span><span class="p">(</span><span class="s2">"Plotting "</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">cityname</span><span class="p">))</span> <span class="o">+</span> <span class="s2">" cities"</span><span class="p">)</span>
|
||
|
||
<span class="c1"># Plot city markers</span>
|
||
<span class="n">ax</span><span class="o">.</span><span class="n">scatter</span><span class="p">([</span><span class="n">point</span><span class="o">.</span><span class="n">x</span> <span class="k">for</span> <span class="n">point</span> <span class="ow">in</span> <span class="n">citylist</span><span class="p">],</span>
|
||
<span class="p">[</span><span class="n">point</span><span class="o">.</span><span class="n">y</span> <span class="k">for</span> <span class="n">point</span> <span class="ow">in</span> <span class="n">citylist</span><span class="p">],</span>
|
||
<span class="n">transform</span><span class="o">=</span><span class="n">ccrs</span><span class="o">.</span><span class="n">PlateCarree</span><span class="p">(),</span><span class="n">marker</span><span class="o">=</span><span class="s2">"+"</span><span class="p">,</span><span class="n">facecolor</span><span class="o">=</span><span class="s1">'black'</span><span class="p">)</span>
|
||
<span class="c1"># Plot city names</span>
|
||
<span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">txt</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">cityname</span><span class="p">):</span>
|
||
<span class="n">ax</span><span class="o">.</span><span class="n">annotate</span><span class="p">(</span><span class="n">txt</span><span class="p">,</span> <span class="p">(</span><span class="n">citylist</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">x</span><span class="p">,</span><span class="n">citylist</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">y</span><span class="p">),</span>
|
||
<span class="n">xytext</span><span class="o">=</span><span class="p">(</span><span class="mi">3</span><span class="p">,</span><span class="mi">3</span><span class="p">),</span> <span class="n">textcoords</span><span class="o">=</span><span class="s2">"offset points"</span><span class="p">)</span>
|
||
|
||
<span class="n">fig</span>
|
||
</pre></div>
|
||
</div>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">Queried</span> <span class="mi">1205</span> <span class="n">total</span> <span class="n">cities</span>
|
||
<span class="n">Plotting</span> <span class="mi">58</span> <span class="n">cities</span>
|
||
</pre></div>
|
||
</div>
|
||
<img alt="../../_images/Map_Resources_and_Topography_22_1.png" src="../../_images/Map_Resources_and_Topography_22_1.png" />
|
||
<p><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html">Top</a></p>
|
||
</section>
|
||
<hr class="docutils" />
|
||
<section id="draw-nearby-lakes">
|
||
<h3>8 Draw Nearby Lakes<a class="headerlink" href="#draw-nearby-lakes" title="Permalink to this heading"></a></h3>
|
||
<p>Again, use the <strong>envelope</strong> attribute to define a new data requst for
|
||
the nearby lakes.</p>
|
||
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="c1"># Define request for lakes</span>
|
||
<span class="n">request</span> <span class="o">=</span> <span class="n">DataAccessLayer</span><span class="o">.</span><span class="n">newDataRequest</span><span class="p">(</span><span class="s1">'maps'</span><span class="p">,</span> <span class="n">envelope</span><span class="o">=</span><span class="n">envelope</span><span class="p">)</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">addIdentifier</span><span class="p">(</span><span class="s1">'table'</span><span class="p">,</span> <span class="s1">'mapdata.lake'</span><span class="p">)</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">addIdentifier</span><span class="p">(</span><span class="s1">'geomField'</span><span class="p">,</span> <span class="s1">'the_geom'</span><span class="p">)</span>
|
||
|
||
<span class="c1"># Get lake geometries</span>
|
||
<span class="n">response</span> <span class="o">=</span> <span class="n">DataAccessLayer</span><span class="o">.</span><span class="n">getGeometryData</span><span class="p">(</span><span class="n">request</span><span class="p">)</span>
|
||
<span class="nb">print</span><span class="p">(</span><span class="s2">"Using "</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">response</span><span class="p">))</span> <span class="o">+</span> <span class="s2">" lake MultiPolygons"</span><span class="p">)</span>
|
||
|
||
<span class="c1"># Plot lakes</span>
|
||
<span class="n">shape_feature</span> <span class="o">=</span> <span class="n">ShapelyFeature</span><span class="p">([</span><span class="n">lake</span><span class="o">.</span><span class="n">getGeometry</span><span class="p">()</span> <span class="k">for</span> <span class="n">lake</span> <span class="ow">in</span> <span class="n">response</span><span class="p">],</span><span class="n">ccrs</span><span class="o">.</span><span class="n">PlateCarree</span><span class="p">(),</span>
|
||
<span class="n">facecolor</span><span class="o">=</span><span class="s1">'blue'</span><span class="p">,</span> <span class="n">linestyle</span><span class="o">=</span><span class="s2">"-"</span><span class="p">,</span><span class="n">edgecolor</span><span class="o">=</span><span class="s1">'#20B2AA'</span><span class="p">)</span>
|
||
<span class="n">ax</span><span class="o">.</span><span class="n">add_feature</span><span class="p">(</span><span class="n">shape_feature</span><span class="p">)</span>
|
||
<span class="n">fig</span>
|
||
</pre></div>
|
||
</div>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">Using</span> <span class="mi">208</span> <span class="n">lake</span> <span class="n">MultiPolygons</span>
|
||
</pre></div>
|
||
</div>
|
||
<img alt="../../_images/Map_Resources_and_Topography_25_1.png" src="../../_images/Map_Resources_and_Topography_25_1.png" />
|
||
<p><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html">Top</a></p>
|
||
</section>
|
||
<hr class="docutils" />
|
||
<section id="draw-major-rivers">
|
||
<h3>9 Draw Major Rivers<a class="headerlink" href="#draw-major-rivers" title="Permalink to this heading"></a></h3>
|
||
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="c1"># Define request for rivers</span>
|
||
<span class="n">request</span> <span class="o">=</span> <span class="n">DataAccessLayer</span><span class="o">.</span><span class="n">newDataRequest</span><span class="p">(</span><span class="s1">'maps'</span><span class="p">,</span> <span class="n">envelope</span><span class="o">=</span><span class="n">envelope</span><span class="p">)</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">addIdentifier</span><span class="p">(</span><span class="s1">'table'</span><span class="p">,</span> <span class="s1">'mapdata.majorrivers'</span><span class="p">)</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">addIdentifier</span><span class="p">(</span><span class="s1">'geomField'</span><span class="p">,</span> <span class="s1">'the_geom'</span><span class="p">)</span>
|
||
<span class="n">rivers</span> <span class="o">=</span> <span class="n">DataAccessLayer</span><span class="o">.</span><span class="n">getGeometryData</span><span class="p">(</span><span class="n">request</span><span class="p">)</span>
|
||
<span class="nb">print</span><span class="p">(</span><span class="s2">"Using "</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">rivers</span><span class="p">))</span> <span class="o">+</span> <span class="s2">" river MultiLineStrings"</span><span class="p">)</span>
|
||
|
||
<span class="c1"># Plot rivers</span>
|
||
<span class="n">shape_feature</span> <span class="o">=</span> <span class="n">ShapelyFeature</span><span class="p">([</span><span class="n">river</span><span class="o">.</span><span class="n">getGeometry</span><span class="p">()</span> <span class="k">for</span> <span class="n">river</span> <span class="ow">in</span> <span class="n">rivers</span><span class="p">],</span><span class="n">ccrs</span><span class="o">.</span><span class="n">PlateCarree</span><span class="p">(),</span>
|
||
<span class="n">facecolor</span><span class="o">=</span><span class="s1">'none'</span><span class="p">,</span> <span class="n">linestyle</span><span class="o">=</span><span class="s2">":"</span><span class="p">,</span><span class="n">edgecolor</span><span class="o">=</span><span class="s1">'#20B2AA'</span><span class="p">)</span>
|
||
<span class="n">ax</span><span class="o">.</span><span class="n">add_feature</span><span class="p">(</span><span class="n">shape_feature</span><span class="p">)</span>
|
||
<span class="n">fig</span>
|
||
</pre></div>
|
||
</div>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">Using</span> <span class="mi">1400</span> <span class="n">river</span> <span class="n">MultiLineStrings</span>
|
||
</pre></div>
|
||
</div>
|
||
<img alt="../../_images/Map_Resources_and_Topography_28_1.png" src="../../_images/Map_Resources_and_Topography_28_1.png" />
|
||
<p><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html">Top</a></p>
|
||
</section>
|
||
<hr class="docutils" />
|
||
<section id="draw-topography">
|
||
<h3>10 Draw Topography<a class="headerlink" href="#draw-topography" title="Permalink to this heading"></a></h3>
|
||
<p>Spatial envelopes are required for topo requests, which can become slow
|
||
to download and render for large (CONUS) maps.</p>
|
||
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="c1"># Define topography request</span>
|
||
<span class="n">request</span> <span class="o">=</span> <span class="n">DataAccessLayer</span><span class="o">.</span><span class="n">newDataRequest</span><span class="p">(</span><span class="s2">"topo"</span><span class="p">,</span> <span class="n">envelope</span><span class="o">=</span><span class="n">envelope</span><span class="p">)</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">addIdentifier</span><span class="p">(</span><span class="s2">"group"</span><span class="p">,</span> <span class="s2">"/"</span><span class="p">)</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">addIdentifier</span><span class="p">(</span><span class="s2">"dataset"</span><span class="p">,</span> <span class="s2">"full"</span><span class="p">)</span>
|
||
<span class="n">gridData</span> <span class="o">=</span> <span class="n">DataAccessLayer</span><span class="o">.</span><span class="n">getGridData</span><span class="p">(</span><span class="n">request</span><span class="p">)</span>
|
||
<span class="nb">print</span><span class="p">(</span><span class="n">gridData</span><span class="p">)</span>
|
||
<span class="nb">print</span><span class="p">(</span><span class="s2">"Number of grid records: "</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">gridData</span><span class="p">)))</span>
|
||
<span class="nb">print</span><span class="p">(</span><span class="s2">"Sample grid data shape:</span><span class="se">\n</span><span class="s2">"</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="n">gridData</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">getRawData</span><span class="p">()</span><span class="o">.</span><span class="n">shape</span><span class="p">)</span> <span class="o">+</span> <span class="s2">"</span><span class="se">\n</span><span class="s2">"</span><span class="p">)</span>
|
||
<span class="nb">print</span><span class="p">(</span><span class="s2">"Sample grid data:</span><span class="se">\n</span><span class="s2">"</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="n">gridData</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">getRawData</span><span class="p">())</span> <span class="o">+</span> <span class="s2">"</span><span class="se">\n</span><span class="s2">"</span><span class="p">)</span>
|
||
</pre></div>
|
||
</div>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="p">[</span><span class="o"><</span><span class="n">awips</span><span class="o">.</span><span class="n">dataaccess</span><span class="o">.</span><span class="n">PyGridData</span><span class="o">.</span><span class="n">PyGridData</span> <span class="nb">object</span> <span class="n">at</span> <span class="mh">0x115a20370</span><span class="o">></span><span class="p">]</span>
|
||
<span class="n">Number</span> <span class="n">of</span> <span class="n">grid</span> <span class="n">records</span><span class="p">:</span> <span class="mi">1</span>
|
||
<span class="n">Sample</span> <span class="n">grid</span> <span class="n">data</span> <span class="n">shape</span><span class="p">:</span>
|
||
<span class="p">(</span><span class="mi">778</span><span class="p">,</span> <span class="mi">1058</span><span class="p">)</span>
|
||
|
||
<span class="n">Sample</span> <span class="n">grid</span> <span class="n">data</span><span class="p">:</span>
|
||
<span class="p">[[</span><span class="mf">1694.</span> <span class="mf">1693.</span> <span class="mf">1688.</span> <span class="o">...</span> <span class="mf">757.</span> <span class="mf">761.</span> <span class="mf">762.</span><span class="p">]</span>
|
||
<span class="p">[</span><span class="mf">1701.</span> <span class="mf">1701.</span> <span class="mf">1701.</span> <span class="o">...</span> <span class="mf">758.</span> <span class="mf">760.</span> <span class="mf">762.</span><span class="p">]</span>
|
||
<span class="p">[</span><span class="mf">1703.</span> <span class="mf">1703.</span> <span class="mf">1703.</span> <span class="o">...</span> <span class="mf">760.</span> <span class="mf">761.</span> <span class="mf">762.</span><span class="p">]</span>
|
||
<span class="o">...</span>
|
||
<span class="p">[</span><span class="mf">1767.</span> <span class="mf">1741.</span> <span class="mf">1706.</span> <span class="o">...</span> <span class="mf">769.</span> <span class="mf">762.</span> <span class="mf">768.</span><span class="p">]</span>
|
||
<span class="p">[</span><span class="mf">1767.</span> <span class="mf">1746.</span> <span class="mf">1716.</span> <span class="o">...</span> <span class="mf">775.</span> <span class="mf">765.</span> <span class="mf">761.</span><span class="p">]</span>
|
||
<span class="p">[</span><span class="mf">1781.</span> <span class="mf">1753.</span> <span class="mf">1730.</span> <span class="o">...</span> <span class="mf">766.</span> <span class="mf">762.</span> <span class="mf">759.</span><span class="p">]]</span>
|
||
</pre></div>
|
||
</div>
|
||
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">grid</span><span class="o">=</span><span class="n">gridData</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
|
||
<span class="n">topo</span><span class="o">=</span><span class="n">ma</span><span class="o">.</span><span class="n">masked_invalid</span><span class="p">(</span><span class="n">grid</span><span class="o">.</span><span class="n">getRawData</span><span class="p">())</span>
|
||
<span class="n">lons</span><span class="p">,</span> <span class="n">lats</span> <span class="o">=</span> <span class="n">grid</span><span class="o">.</span><span class="n">getLatLonCoords</span><span class="p">()</span>
|
||
<span class="nb">print</span><span class="p">(</span><span class="n">topo</span><span class="o">.</span><span class="n">min</span><span class="p">())</span> <span class="c1"># minimum elevation in our domain (meters)</span>
|
||
<span class="nb">print</span><span class="p">(</span><span class="n">topo</span><span class="o">.</span><span class="n">max</span><span class="p">())</span> <span class="c1"># maximum elevation in our domain (meters)</span>
|
||
|
||
<span class="c1"># Plot topography</span>
|
||
<span class="n">cs</span> <span class="o">=</span> <span class="n">ax</span><span class="o">.</span><span class="n">contourf</span><span class="p">(</span><span class="n">lons</span><span class="p">,</span> <span class="n">lats</span><span class="p">,</span> <span class="n">topo</span><span class="p">,</span> <span class="mi">80</span><span class="p">,</span> <span class="n">cmap</span><span class="o">=</span><span class="n">plt</span><span class="o">.</span><span class="n">get_cmap</span><span class="p">(</span><span class="s1">'terrain'</span><span class="p">),</span><span class="n">alpha</span><span class="o">=</span><span class="mf">0.1</span><span class="p">,</span> <span class="n">extend</span><span class="o">=</span><span class="s1">'both'</span><span class="p">)</span>
|
||
<span class="n">cbar</span> <span class="o">=</span> <span class="n">fig</span><span class="o">.</span><span class="n">colorbar</span><span class="p">(</span><span class="n">cs</span><span class="p">,</span> <span class="n">shrink</span><span class="o">=</span><span class="mf">0.5</span><span class="p">,</span> <span class="n">orientation</span><span class="o">=</span><span class="s1">'horizontal'</span><span class="p">)</span>
|
||
<span class="n">cbar</span><span class="o">.</span><span class="n">set_label</span><span class="p">(</span><span class="s2">"topography height in meters"</span><span class="p">)</span>
|
||
|
||
<span class="n">fig</span>
|
||
</pre></div>
|
||
</div>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="mf">623.0</span>
|
||
<span class="mf">4328.0</span>
|
||
</pre></div>
|
||
</div>
|
||
<img alt="../../_images/Map_Resources_and_Topography_32_1.png" src="../../_images/Map_Resources_and_Topography_32_1.png" />
|
||
<p><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html">Top</a></p>
|
||
</section>
|
||
<hr class="docutils" />
|
||
<section id="see-also">
|
||
<h3>11 See Also<a class="headerlink" href="#see-also" title="Permalink to this heading"></a></h3>
|
||
<section id="additional-documentation">
|
||
<h4>11.1 Additional Documentation<a class="headerlink" href="#additional-documentation" title="Permalink to this heading"></a></h4>
|
||
<ul>
|
||
<li><p>This notebook requires: <strong>python-awips, numpy, matplotplib, cartopy,
|
||
shapely</strong></p></li>
|
||
<li><p>Use datatype <strong>maps</strong> and <strong>addIdentifier(‘table’, <postgres maps
|
||
schema>)</strong> to define the map table:
|
||
DataAccessLayer.changeEDEXHost(“edex-cloud.unidata.ucar.edu”) request
|
||
= DataAccessLayer.newDataRequest(‘maps’)
|
||
request.addIdentifier(‘table’, ‘mapdata.county’)</p></li>
|
||
<li><p>Use <strong>request.setLocationNames()</strong> and <strong>request.addIdentifier()</strong> to
|
||
spatially filter a map resource. In the example below, WFO ID <strong>BOU</strong>
|
||
(Boulder, Colorado) is used to query counties within the BOU county
|
||
watch area (CWA)</p>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">request</span><span class="o">.</span><span class="n">addIdentifier</span><span class="p">(</span><span class="s1">'geomField'</span><span class="p">,</span> <span class="s1">'the_geom'</span><span class="p">)</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">addIdentifier</span><span class="p">(</span><span class="s1">'inLocation'</span><span class="p">,</span> <span class="s1">'true'</span><span class="p">)</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">addIdentifier</span><span class="p">(</span><span class="s1">'locationField'</span><span class="p">,</span> <span class="s1">'cwa'</span><span class="p">)</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">setLocationNames</span><span class="p">(</span><span class="s1">'BOU'</span><span class="p">)</span>
|
||
<span class="n">request</span><span class="o">.</span><span class="n">addIdentifier</span><span class="p">(</span><span class="s1">'cwa'</span><span class="p">,</span> <span class="s1">'BOU'</span><span class="p">)</span>
|
||
</pre></div>
|
||
</div>
|
||
</li>
|
||
</ul>
|
||
<p>See the <a class="reference external" href="http://unidata.github.io/awips2/python/maps-database/#mapdatacw">Maps Database Reference
|
||
Page</a>
|
||
for available database tables, column names, and types.</p>
|
||
<p><a class="reference external" href="https://unidata.github.io/python-awips/examples/generated/Map_Resources_and_Topography.html">Top</a></p>
|
||
<hr class="docutils" />
|
||
</section>
|
||
</section>
|
||
</section>
|
||
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|
||
|
||
|
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|
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