Hi,
Thanks for your reply. That’s actually what I’m going for. I have a Cache that holds some thousand tiles in ram and a cache that uses the hard drive. Using a simple HashMap respectively file names for that. I have a Listener, maybe a MapPaneListener, that will download tiles in a separate thread and render them as required. Back to the missing tiles: I was able to eliminate the problem in 2 ways: map.setRepaint(false); add all layers map.setRepaint(true); map.drawBaseImage(false); // I made this public map.repaint(); But since adding all layers may take several seconds that isn’t really acceptable. Interesting enough I found another solution: After adding each layer as described before I add a sleep: map.getMapContext().addLayer(layer); Thread.sleep(25); Then I can see how tile by tile is drawn - and it flickers a LOT :D But at least the final result is perfect. It’s just not advisable to look at it during rendering… I can only guess the Problem is something like addLayer triggering drawBaseImage or something multiple times before the last run was even completed. “We did back port the tile code in GeoTools 2.5.x” can u please point me to where that is? I downloaded 2.5.8-src but can’t find it there. “I expect you are running into trouble with images being loaded gradually” – during testing I have all the BufferedImages in ram. Regards, Alex P.S. sry code in last mail lost all line breaks, no idea why that happened. Von: Jody Garnett [mailto:[email protected]] Gesendet: Donnerstag, 9. Juni 2011 02:04 An: [email protected] Cc: [email protected] Betreff: Re: [Geotools-gt2-users] osm tiles: GridCoverage2D layers We do something similar to display tiles from a range of services (google maps, osm, wmts, etc...) in uDig. We gather up the tiles into a collection of grid coverages for display. We do however load the tiles in a background thread and refresh the screen as they come in (with the option of loading them into a memory or disk based cache). I expect you are running into trouble with images being loaded gradually; and your mapMove gives you a chance to redraw the same image now that it has content. You may wish to try and force the content to load (and listen to the image so you can tell when it is done); or save the content to disk and render from that ... We did back port the tile code in GeoTools 2.5.x but there was not enough enough collaboration to complete the effort. Since that time a google summer of code project has made the uDig tile rendering / fetching system much more capable. If anyone is interested in porting the work into an unsupported module is welcome to, the uDig code base would happily track the change to prevent duplication of future effort. -- Jody Garnett On Thursday, 9 June 2011 at 9:10 AM, Alexander Lanin wrote: 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 ------------------------------------------------------------------------------ EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev _______________________________________________ Geotools-gt2-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users ------------------------------------------------------------------------------ EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev _______________________________________________ Geotools-gt2-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
