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Issue #1553 fix RenderableTileSet for round projections.

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Former-commit-id: 1e6d6ac799 [formerly 8bd997f193b4a8cc75fc6609b321b29f2524c08b]
Former-commit-id: f31215a999
This commit is contained in:
Ben Steffensmeier 2013-01-31 17:05:47 -06:00
parent 9183e40c5f
commit 8c3deb1a93
1 changed files with 28 additions and 1 deletions
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29
edexOsgi/com.raytheon.uf.common.geospatial/src/com/raytheon/uf/common/geospatial/util/EnvelopeIntersection.java
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@ -174,6 +174,10 @@ public class EnvelopeIntersection {
MathTransform latLonToTargetCRS = targetCRSToLatLon.inverse();
// If we are able to create a polygon from the lineStrings, save it in
// this variable to use later if all else fails.
Geometry correctedPolygon = null;
int numStrings = lineStrings.size();
if (numStrings == 1) {
// Check for one continuous line string that starts and ends at same
@ -182,7 +186,8 @@ public class EnvelopeIntersection {
Coordinate[] coords = ls.getCoordinates();
if (coords[0].equals(coords[coords.length - 1])) {
border = gf.createPolygon(gf.createLinearRing(coords), null);
border = JTS.transform(corrector.correct(JTS.transform(border,
border = correctedPolygon = JTS.transform(corrector.correct(JTS
.transform(border,
targetCRSToLatLon)), latLonToTargetCRS);
}
}
@ -481,6 +486,28 @@ public class EnvelopeIntersection {
}
}
if ((border == null || border.isEmpty() || border.isValid() == false)) {
if (correctedPolygon != null) {
// buffering will make an invalid polygon valid. This is known
// to be the correct action for rounded grids such as lat/lon
// source on a polar stereographic target or radial data.
border = correctedPolygon.buffer(0);
} else if (lineStrings.size() == 1) {
// There is a last resort. There are no known envelopes that hit
// this but just in case we have problems this will be slightly
// better than nothing.
border = lineStrings.get(0).getEnvelope();
} else {
// Also a last resort.
List<Geometry> envelopes = new ArrayList<Geometry>(
lineStrings.size());
for (LineString ls : lineStrings) {
envelopes.add(ls.getEnvelope());
}
gf.createGeometryCollection(envelopes.toArray(new Geometry[0]));
}
}
System.out.println("Time to create EnvelopeIntersection: "
+ (System.currentTimeMillis() - t0) + "ms");
return border;