[Gwt-openlayers-users] How to display features that are stored in PostGIS

[www.gwtorm.com <jim...@gm...>]

I have data stored in POSTGIS. I can access them through GWT-RPC. What is
best way to retrieve them from POSTGIS and display them on a map in
performance.
1. as double[][]
2. KML
3. GML
4. GeoJSON.
...

I tested KML as in the following code. It doesn't display anything on a map.

                    KML kml = new KML();
                    VectorFeature[] features = kml.read(json);
                    System.out.println(features.length);
//                  VectorFeature vectorFeature = new VectorFeature();
//
                    VectorOptions vectorOptions = new VectorOptions();
                    vectorOptions.setVisibility(true);

                    vector = new Vector("GeoJSON", vectorOptions);
                    vector.addFeatures(features);

                   map.addLayer(vector);

json is a KML string returned from GWT-RPC. I tested the same KML on
http://kml-samples.googlecode.com/svn/trunk/interactive/index.html#./Multi-Geometries/Multi-Geometries.Simple.kml.
It works perfectly.


Thanks,

Jim