To create a mark using a FeatureCollection:
//get the crsA from the schema
crsA = featureSource.getSchema().getCoordinateReferenceSystem();
//add a 'mark' to the feature collection
FeatureCollection<SimpleFeatureType, SimpleFeature> fc =
FeatureCollections.newCollection();
fc.add(createDot(131.0, 30.0,crsA));
//create a new map context
MapContext map = new MapDefaultMapContext(crsA);
//add a layer containing your collection of 'mark's and create a style
map.addLayer(fc,createPointStyle());
//the createPointStyle method
private static Style createPointStyle() {
Style style;
PointSymbolizer symbolizer = styleFactory.createPointSymbolizer();
symbolizer.getGraphic().setSize(filterFactory.literal(2)); //will
determine how big the 'mark' is
Rule rule = styleFactory.createRule();
rule.setSymbolizers(new Symbolizer[] { symbolizer });
FeatureTypeStyle fts = styleFactory.createFeatureTypeStyle();
fts.setRules(new Rule[] { rule });
style = styleFactory.createStyle();
style.addFeatureTypeStyle(fts);
return style;
}
now add the map to the JMapPane
Hope this helps.
sasi wrote:
>
> Suppose i have read a shape file(countries.shp) and have showed this map.
> Then how can i place a mark in the map. The location of this mark is
> longitude:131 & latitude:30(Shanghai, China).
> And how about if I wish the mark being displayed as an icon(*.ico file in
> local disk)?
> I am appriciated if a demo code will be provided.
>
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