As I've mentioned on this list, I'm interested in support in JOSM for the ArcGIS REST API [1], as my location (Virginia, USA [2]) has very good quality (1ft resolution, off-leaf), public domain imagery, but is only available via that API.
Ian Dees suggested I extend AbstractOsmTileSource and convert the requested tile x/y/zoom to coordinates, and then use the export interface of Arc GIS REST [3] to request the tile. I've implemented this, and I'm happy to see that the imagery lines up correctly, however there are gaps between vertical tiles, which you can see in this image [4]. You can view the code here [5]. Why might this be happening? I'm guessing it has something to do with projection differences, but I don't really know. The Virginia ArcGIS REST server uses the Virginia LCC projection, so I first convert the tile x/y/zoom to WGS84 lat/lon corners, convert those to Virginia LCC using the Proj4J plugin [6], then submit the URL to the server. I know this should be a temporary solution anyways, as I should be using the tile cache provided by the server, however it seems more difficult to implement considering the tiling scheme is completely different than the mercator system used by TMS, so I'd need to do more than just create a TileSource, but rather assumptions about resolution and zoom levels must be changed in other JOSM code. Any thoughts would be appreciated, thanks! -Josh [1]: http://resources.esri.com/help/9.3/arcgisserver/apis/rest/index.html [2]: http://wiki.openstreetmap.org/wiki/Virginia#2006.2F2007_VBMP_Orthoimagery [3]: http://resources.esri.com/help/9.3/arcgisserver/apis/rest/export.html [4]: http://postimage.org/image/7g16nd6s/ [5]: http://java.pastecode.com/2183 [6]: http://wiki.openstreetmap.org/wiki/JOSM/Plugins/Proj4J _______________________________________________ josm-dev mailing list josm-...@openstreetmap.org http://lists.openstreetmap.org/listinfo/josm-dev
