Hi,
I found the answer to my own question:
CRSAuthorityFactory factory =
ReferencingFactoryFinder.getCRSAuthorityFactory("EPSG", null);
CoordinateReferenceSystem crs =
factory.createCoordinateReferenceSystem("4326");
Thanks!
Greg
On Jan 14, 2009, at 12:40 PM, Greg Ederer wrote:
> Hi,
>
> I am reading a shapefile using the following code from the User Guide:
>
> File file = new File("/Users/gregederer/servers/geoserver_data/data/
> shapefiles/gaul/Africa/g2008_1.shp");//getShapeFile(args);
>
> ShapefileDataStore shapefile = new
> ShapefileDataStore(file.toURL());
> String typeName = shapefile.getTypeNames()[0];
> FeatureSource featureSource = shapefile.getFeatureSource();
> FeatureType schema = featureSource.getSchema();
> CoordinateReferenceSystem crs =
> schema.getGeometryDescriptor().getCoordinateReferenceSystem();
>
> MapContext map = new DefaultMapContext(crs);
> Style style = createStyle(file, schema);
> map.addLayer(featureSource, style);
>
> showMap(map);
>
> in showMap():
>
> final JMapPane mapPane = new JMapPane(new StreamingRenderer(),
> map);
> mapPane.setMapArea(map.getLayerBounds());
>
> When I run this code against my shapefile, I get:
>
> Exception in thread "main" java.io.IOException: CRS of this map
> context is null. Unable to get bounds.
> at
> org
> .geotools.map.DefaultMapContext.getLayerBounds(DefaultMapContext.java:
> 544)
> at org.esv.SummaryStats.ShapeLab.showMap(ShapeLab.java:187)
> at org.esv.SummaryStats.ShapeLab.main(ShapeLab.java:75)
>
> Is it possible that this shapefile has no CRS? If so, is there a
> factory method that I can use to get the required
> CoordinateReferenceSystem reference? I happen to know that this
> particular shapefile is in ESPG:4326. What other parameters will I
> need?
>
> Thanks!
>
> Greg
>
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