Abandon Coord class in favor of shapely.Point

lib/nexrad/afos.py

@@ -204,3 +204,9 @@ class AFOSMessage(DatabaseTable):
                     event.forecaster = line
 
         return event
+
+    def is_watch(self):
+        return self.sig is not None and self.sig == 'A'
+
+    def is_warning(self):
+        return self.sig is not None and self.sig == 'W'

lib/nexrad/coord.py

@@ -1,22 +1 @@
-import shapely
-
 COORD_SYSTEM = 4326
-
-class Coord():
-    __slots__ = 'lon', 'lat',
-
-    def __init__(self, lon: float, lat: float):
-        self.lon: float = lon
-        self.lat: float = lat
-
-    def __str__(self):
-        return '%f, %f' % (self.lon, self.lat)
-
-    @staticmethod
-    def from_wkt(wkt: str):
-        try:
-            point = shapely.from_wkt(wkt)
-
-            return Coord(point.x, point.y)
-        except:
-            return None

lib/nexrad/radar.py

@@ -1,8 +1,9 @@
 import csv
 import re
+import shapely
 
 from nexrad.db    import DatabaseTable
-from nexrad.coord import Coord, COORD_SYSTEM
+from nexrad.coord import COORD_SYSTEM
 
 """
 Implements a parser and wrapper class for the WSR-88D radar list
@@ -37,7 +38,7 @@ def parse(text: str):
     lon = parse_int(match[3])
     lat = parse_int(match[1])
 
-    return Coord(sign_lon * lon, sign_lat * lat)
+    return shapely.Point(sign_lon * lon, sign_lat * lat)
 
 RADAR_RANGE = 230000
 
@@ -58,7 +59,7 @@ class Radar(DatabaseTable):
     }
 
     __values_read__ = {
-        'coord': Coord.from_wkt
+        'coord': shapely.from_wkt
     }
 
     __columns_write__ = {
@@ -66,13 +67,13 @@ class Radar(DatabaseTable):
     }
 
     __values_write__ = {
-        'coord': lambda v: {'coord_lon': v.lon, 'coord_lat': v.lat}
+        'coord': lambda v: {'coord_lon': v.x, 'coord_lat': v.y}
     }
 
     call:           str
     wban:           int
     name:           str
-    coord:          Coord
+    coord:          shapely.Point
     site_elevation: float
     tower_height:   float
 

lib/nexrad/storm.py

@@ -2,9 +2,10 @@ import re
 import gzip
 import csv
 import datetime
+import shapely
 
 from nexrad.db    import DatabaseTable
-from nexrad.coord import Coord, COORD_SYSTEM
+from nexrad.coord import COORD_SYSTEM
 from nexrad.radar import RADAR_RANGE
 
 def time_from_str(time: str):
@@ -78,7 +79,7 @@ def coord_from_str(text_lon: str, text_lat: str):
     if text_lon == '' or text_lat == '':
         return
 
-    return Coord(float(text_lon), float(text_lat))
+    return shapely.Point(float(text_lon), float(text_lat))
 
 class StormEvent(DatabaseTable):
     __slots__ = (
@@ -104,8 +105,8 @@ class StormEvent(DatabaseTable):
     __values_read__ = {
         'timestamp_start': datetime.datetime.fromisoformat,
         'timestamp_end':   datetime.datetime.fromisoformat,
-        'coord_start':     Coord.from_wkt,
+        'coord_start':     shapely.from_wkt,
-        'coord_end':       Coord.from_wkt
+        'coord_end':       shapely.from_wkt
     }
 
     __columns_write__ = {
@@ -114,8 +115,8 @@ class StormEvent(DatabaseTable):
     }
 
     __values_write__ = {
-        'coord_start': lambda v: {'coord_start_lon': v.lon, 'coord_start_lat': v.lat},
+        'coord_start': lambda v: {'coord_start_lon': v.x, 'coord_start_lat': v.y},
-        'coord_end':   lambda v: {'coord_end_lon':   v.lon, 'coord_end_lat':   v.lat}
+        'coord_end':   lambda v: {'coord_end_lon':   v.x, 'coord_end_lat':   v.y}
     }
 
     id:               int
@@ -128,8 +129,8 @@ class StormEvent(DatabaseTable):
     locale_start:     str
     locale_end:       str
     tornado_f_rating: str
-    coord_start:      Coord
+    coord_start:      shapely.Point
-    coord_end:        Coord
+    coord_end:        shapely.Point
 
     @staticmethod
     def from_csv_row(row: dict):
@@ -173,7 +174,7 @@ class StormEvent(DatabaseTable):
 
     @staticmethod
     def each_matching(db,
-                      coord:     Coord=None,
+                      coord:     shapely.Point=None,
                       radius:    float=RADAR_RANGE,
                       timestamp: datetime.datetime=None):
         columns = StormEvent.__format_columns_select__(StormEvent)
@@ -192,8 +193,8 @@ class StormEvent(DatabaseTable):
             ])
 
             values.update({
-                'lon':    coord.lon,
+                'lon':    coord.x,
-                'lat':    coord.lat,
+                'lat':    coord.y,
                 'crs':    COORD_SYSTEM,
                 'radius': radius
             })
@@ -271,8 +272,8 @@ class StormEvent(DatabaseTable):
         radars = list()
 
         st = db.execute(sql, (
-            self.coord_start.lon, self.coord_start.lat,
+            self.coord_start.x, self.coord_start.y,
-            self.coord_end.lon,   self.coord_end.lat,
+            self.coord_end.x,   self.coord_end.y,
             RADAR_RANGE))
 
         while True: