it is a example for iterate file shapefile, it convert the multipolygon to
linestring:
FeatureCollection featureCollection = (FeatureCollection) figuras
.get(key);
Iterator it =
featureCollection.iterator();
while (it.hasNext()) {
Feature feaNext = (Feature) it.next();
Object geometry = feaNext.getDefaultGeometryValue();
Geometry geom = (Geometry) geometry;
MultiPolygon multiPolygon = (MultiPolygon) geom;
for (int j = 0; j < multiPolygon.getNumGeometries(); j++) {
Geometry geomMulti = multiPolygon.getGeometryN(j);
CoordinateList coordinateList = new CoordinateList();
Vector<Geometry> vectorGeometry = new Vector<Geometry>();
for (int i = 0; i < geomMulti.getCoordinates().length; i++) {
if (coordinateList.size() > 0
&&
coordinateList.contains(geomMulti.getCoordinates()[i])) {
coordinateList.add(geomMulti.getCoordinates()[i], true);
vectorGeometry.add(gf.createLineString(coordinateList.toCoordinateArray()));
coordinateList = new CoordinateList();
} else {
coordinateList.add(geomMulti
.getCoordinates()[i], true);
}
}
//here, you have all geometry contains the multipolygon.
}
}
Sorry for my english.
yellowbkpk wrote:
>
> I'd like to iterate through all of the features of a Shapefile (and
> convert them to OpenStreetMap format, but I can do that part once I read
> them).
>
> I've succesfully followed the tutorial on the webpage to read the
> shapefile, but the problem is that once I read it in, I can't break apart
> any of the multi* geometry types.
>
> If I have a MultiPolygon or MultiLineString (for example), how do I fetch
> the pieces of the geometry using the JTS API?
>
> It looks like I could continuously break it down with getGeometryN() and
> getNumGeometries(), but then I would lose the ability to group the points
> into the lines and polygons.
>
> Thanks,
> Ian
>
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