RE: [Geotools-gt2-users] Problem with RenderedMapScale

[Virginie BERRE]

Hi Martin !   I've understand what you told me but I don't know how to initialise the Envelope. Could you help be a bit more and tell me what to write in the brackets: Envelope envelope = new Envelope( ??? );   Thanks!   Virginie   -----Message d'origine----- De : Martin Desruisseaux [mailto:[EMAIL PROTECTED] Envoyé : jeudi 15 septembre 2005 00:44 À : Virginie BERRE Cc : geotools-gt2-users@lists.sourceforge.net Objet : Re: [Geotools-gt2-users] Problem with RenderedMapScale   Virginie BERRE a écrit : > I would like to add a RenderedMapScale to a StyledMapPane but it doesn’t > display the right scale. > > StyledMapPane mapPane = new StyledMapPane(); > mapPane.setPaintingWhileAdjusting(true); > mapPane.getRenderer().addLayer(new RenderedMapScale());   There is nothing more to do in principle...     > /Envelope envelope = new Envelope(mapPane.getVisibleArea());/ > /GridCoverage rGC = new GridCoverage("WMSGC", image, GeographicCoordinateSystem.WGS84, envelope);/   We may have a problem here. The envelope given to the GridCoverage should be the envelope of the real data. It is usually know from an external source (totally independant of rendering). For example you may know that yours image cover an area from 5°W to 15°E and 20°N to 30°N.   MapPane.getVisibleArea() is absolutly not a reliable way to get the Envelope for the coverage, because the MapPane visible area is strongly dependent of factors unrelated to the "real" data, like user zoom, widget size, etc. The GridCoverage should be created in a way totally independent from MapPane or Renderer.         Martin.