Hello,
I have the need to find if a Point resides inside a MultiPolygon. Where the
MultiPolygon is from a Shapefile and the point is Primitive.
I wrote code based off of the filter query tutorial
(http://docs.geotools.org/latest/tutorials/filter/query.html) but I keep
receiving 0 (zero) results. If someone could point me in the right direction I
would appreciate it. My code follows below:
Chad Hutchins
Meteorologist
Naval Research Laboratory
Marine Meteorology Division
Monterey, CA
/**
*
* This method tells you what COCOM your point is in.
*
* @param lat (String)
* @param lon (String
* @return the COCOM Name
*/
public String getCOCOMfromLatLon(String lat, String lon) {
//Holder for COCOM once found
String command = null;
//To point
DirectPosition here = positionFactory.createDirectPosition(new
double[] { Double.parseDouble(lon), Double.parseDouble(lat) });
Point point = primitiveFactory.createPoint(here);
//System.out.println("POINT TEST::: " +
point.getRepresentativePoint().getCoordinate().toString());
FilterFactory2 ff = CommonFactoryFinder.getFilterFactory2(null);
//Schema for finding local name
SimpleFeatureType type = source.getSchema();
System.out.println("GEO DESC:: " +
type.getGeometryDescriptor().getLocalName());
Filter filter =
ff.within(ff.property(type.getGeometryDescriptor().getLocalName()),
ff.literal(point));
try {
SimpleFeatureCollection results =
source.getFeatures(filter);
//System.out.println("RESULTS SIZE::: " + results.size());
//System.out.println("SIZE CHECK::: " +
source.getFeatures().size());
//We should only find one!
if (results.size() > 1) {
throw new Exception("Too Many Results for COCOM
Search");
} else if (results.size() == 0) {
System.err.println("DID NOT FIND A COCOM");
} else {
FeatureIterator<SimpleFeature> i =
results.features();
SimpleFeature f = i.next();
command = f.getAttribute("COMMAND").toString();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return command;
}
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