import com.vividsolutions.jts.index.strtree.STRtree; STRtree index = new STRtree(); index.insert(envelope, spatialObject); Envelope searchEnvelope = new Envelope(x1, x2, y1, y2); List result = index.query(searchEnvelope); import com.vividsolutions.jts.index.strtree.STRtree; public class SpatialIndexDemo { public static void main(String[] args) { STRtree index = new STRtree(); Envelope envelope = new Envelope(x, y, width, height); SpatialObject spatialObject = new SpatialObject(geometry); index.insert(envelope, spatialObject); Envelope searchEnvelope = new Envelope(x1, x2, y1, y2); List result = index.query(searchEnvelope); for (Object obj : result) { SpatialObject spatialResult = (SpatialObject) obj; } } }