Hi Franz, check out OpenLayers.Tile.Image.
Best regards, Bart > Hi Bart, > > thanks for the fast and helpful response! > > One question though: which class actually invokes the methods > OpenLayers.Layer.ArcIMS.getUrl and OpenLayers.Layer.getUrlAsync? > > They seem to be overriden methods, but i couldn't find them in > OpenLayers.Layer.Grid or OpenLayers.Layer.HTTPRequest. > > kind regards, > > Franz > > 2010/8/3 Bart van den Eijnden (OSGIS) <[email protected]> > >> Hi, >> >> I would advise you to look at OpenLayers.Layer.ArcIMS which uses a >> similar >> approach. >> >> Best regards, >> Bart >> >> > Hi, >> > >> > I'm a frontend developer and was programming a web viewer for a >> > proprietary, >> > WMS-like map service. >> > I discovered Openlayers one month ago and I'm really fascinated by its >> > awesome capabilities, so I decided to integrate our map service in >> > OpenLayers. >> > >> > Here is a short description how the map service works: >> > >> > The client sends an AJAX request containing the current map bounds, >> the >> > map >> > id and the pixel size of the map. >> > >> map=22&px=1720&py=833&left=2504400&right=2544000&top=5699500&bottom=5669500&type=0 >> > >> > The server responds with the generated map image (url) and the >> corrected >> > bounds: >> > <MapProperties> >> > <mapLeft>2493227.6110444176</mapLeft> >> > <mapTop>5699500</mapTop> >> > <mapRight>2555172.3889555824</mapRight> >> > <mapBottom>5669500</mapBottom> >> > <mapType>0</mapType> >> > <overviewMap>22</overviewMap> >> > <url> >> http://localhost/cgmCache/41600065-c3d2-4934-9feb-78a32f6668c8.png >> > </url> >> > </MapProperties> >> > >> > The maps are always single-tiled. >> > >> > My first approach was to write a ProprietaryMapLayer, that executes >> the >> > map >> > request and creates an ImageLayer with the result url and its bounds. >> > When the ImageLayer is moved, a new request is performed, the current >> > ImageLayer is destroyed and a new one generated. The disadvantage: >> there >> > are >> > now 2 layers representing one map, which leads to confusion in the >> layer >> > switcher control. >> > >> > I read over the code of Layer.WMS, which inherits from Layer.Grid and >> also >> > makes use of Tile.Image, but it's difficult to derive a solution from >> it, >> > since all the request/response handling is already integrated into the >> > layer. Furthermore, WMS simply responds with tile images, whereas I >> have >> > to >> > deal with an xml response. >> > >> > Any ideas how I could implement my layer? >> > >> > kind regards, >> > >> > Franz >> > _______________________________________________ >> > Users mailing list >> > [email protected] >> > http://openlayers.org/mailman/listinfo/users >> > >> >> >> -- >> Looking for flexible support on OpenLayers or GeoExt? Please check out >> http://www.osgis.nl/support.html >> >> Bart van den Eijnden >> OSGIS >> [email protected] >> >> > -- Looking for flexible support on OpenLayers or GeoExt? Please check out http://www.osgis.nl/support.html Bart van den Eijnden OSGIS [email protected] _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
