Dears.
I want to add some points (read from memory or files) onto an existing layer
(read from a shapefile).
Firstly, the app will open a shapefile (as tutorial does) and a layer of lines
shows up. Then,
the code for adding a new layer:
final SimpleFeatureType NODETYPE = DataUtilities.createType("Location",
"the_geom:Point:srid=4326," + // <- the geometry attribute:
Point type
"id:String," + // <- a String attribute
"number:Integer" // a number attribute
);
Style style = createNodeStyle();
List<SimpleFeature> nodeFeatures = new ArrayList<SimpleFeature>();
GeometryFactory geometryFactory = JTSFactoryFinder.getGeometryFactory();
SimpleFeatureBuilder featureBuilder = new SimpleFeatureBuilder(NODETYPE);
Iterator nodeIte = graph.nodes.entrySet().iterator();
while (nodeIte.hasNext()) {
Map.Entry entry = (Map.Entry) nodeIte.next();
String id = (String) entry.getKey();
Node node = (Node) entry.getValue();
com.vividsolutions.jts.geom.Point point = geometryFactory
.createPoint(node.coordinate);
featureBuilder.add(point);
featureBuilder.add(id);
featureBuilder.add(0);
SimpleFeature feature = featureBuilder.buildFeature(null);
nodeFeatures.add(feature);
}
SimpleFeatureCollection featureCollection = new ListFeatureCollection(NODETYPE,
nodeFeatures);
MapContent map = mapFrame.getMapContent();
map.layers().add(new FeatureLayer(featureCollection, style));
-------------------------------------------------------------------------------------------------
mapFrame is the main frame which has opened the shapefile
After above operation, I can see a new layer is added to the MaplayerTable, but
the nodes can not show up.
Plus, the coordinates of the nodes are correct, because if I add those nodes to
a new JMapFrame, they can show up successfully.
Can anyone help me?------------------------------------------------------------------------------
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