LepiMarbois wrote:
> Dear All,
>
> I have build a data store with CRS (WGS84) containing points displayed on a
> DefaultMapLayer. This works fine with other layers with shapefile,
> gridcoverage of different CRS, but, if I want to change the projection for
> all the
> layers, given another CRS, the layer containing the MemoryDatastore is not
> reprojected, while this works fine for the other layers
> (shapefile,gridcoverage)
It may just be a mistake? We will have to get more specific in order to
figure out where the problem is; try a couple of things
1. check the CRS used by the memory datastore; if it is null then the
reproject code would not be able to work (we need a source and a target
crs in order set up the math transfor fo the screen)
2. check the getFeatues method and see what Query is being sent to the
Memory Datastore; is it the same as for shapefile?
3. check the output of getFeatures on memory datastore and getFeatures
on shapefile for the same query; are they both reprojecting? or is one
of them wrong ... the renderer sometimes checks the output and tries to
do reprojecting on its own..
> Is that due on how I build the FeatureType , featurecollection( I tried
> several manners , same result)?
> Does that comes from the MemoryDatyaStore( I changed in CollectionDataStore,
> same results)?
> Does that comes on from how I change the projection on the DefaultMapLayer ?
> Or anything else ? Any idea will be very appreciated.
> Many thanks,
> Pierre
>
> I work with Geotools 2.4.4
> Code to build FeatureType :
>
> public static FeatureType createFeatureType()throws SchemaException {
> final AttributeType GEOM =
> AttributeTypeFactory.newAttributeType("Location",Point.class,true,
> null,null,
>
> Projections.getCRS(Projections.WGS84) );
>
Is this the same as EPSG:4326? or DefaultGeogrpahicCRS.WGS84?
>
> code to make transformation for any layer on DefaultMapLayer
>
> FeatureSource fs = getFeatureSource();
> String storeTypeName = fs.getDataStore().getTypeNames()[0];
> FeatureType schema = fs.getSchema();
> CoordinateReferenceSystem crs =
> schema.getDefaultGeometry().getCoordinateSystem();
> if (crs == null)
> {System.out.println ("pas de CRS ");return;}
> CoordinateReferenceSystem outCRS =
> context.getCoordinateReferenceSystem() ;
> DefaultQuery q = new DefaultQuery(storeTypeName);
> q.setCoordinateSystem(crs);
> q.setCoordinateSystemReproject(outCRS);
> setQuery(q);
> }
>
That all looks okay; but please check what comes out of fs.getFeatures(
q ); we should make sure you are getting what you expect. If not please
create a bug report with a test case showing thing problem.
I am the author of MemoryDataStore and would like to help check if
anything is being done wrong.
Jody
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