Hi,
I'm trying to get osm tiles (256x256px images) to display in my JMapPane.
What I do is: I download tiles from http://tile.openstreetmap.org/ (then I
cache etc.) and then:
StyleBuilder sb = new StyleBuilder();
Style style = sb.createStyle(sb.createRasterSymbolizer());
GridCoverageFactory gridFactory = new GridCoverageFactory(); GridCoverage2D
grid = gridFactory.create("GridCoverage-" + tile.getUniqueId(),
tile.getImage(), tile.getEnvelope()); MapLayer layer = new MapLayer(grid,
style); _map.getMapContext().addLayer(layer);
_map.repaint();
With _map being a JMapPane.
While this works most of the time, some tiles/layers are sometimes not
rendered. Actually every time there are some tiles/layers missing.
Interestingly when using JMapPane.moveImage in a completely unrelated part
of my code (panning) all the tiles show up. I already tried to use
moveImage(1,1) after addLayer, but that just messes everything up.
Sometimes I get this message:
09.06.2011 00:09:30
org.geotools.renderer.lite.gridcoverage2d.GridCoverageRenderer
prepareFinalImage
INFO: The destination envelope does not intersect the envelope of the source
coverage.
But that's just 10% of the time tiles/layers are missing.
Am I even on the right track for displaying these images? And why doesn't it
work? :-)
Oh and I'm using geotools 8.0-M.0 + fix from
http://jira.codehaus.org/browse/GEOT-3555
Regards,
Alex
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