Many thanks for the response Christopher. I am sorry, since I am unable to share the map service as it is outside the public network.
I am able to get the max extents easily, however, I am unable to find out which resolution value to take. As an example , say I have 3 layers which are cached. The images are 512 by 512 pixels. max Extents are (-180, -90, 180, 90). Layer 1 - Resolution 1058.33 Layer 2 - Resolution 529.16 Layer 3 - Resolution 132.29 I had read in the news group the max resolution should be something like (Max (Xmax - Xmin), (Ymax - Ymin))/512, is this correct? - Thanks in Advance, Rajeev Christopher Schmidt-2 wrote: > > On Thu, Aug 13, 2009 at 05:05:18AM -0500, RajeevSharma wrote: >> >> Hello, >> I am using Open Layers for the first time, and would like to display maps >> from multiple services. >> >> 1. A Tiled map service which forms the background. >> 2. One or more Dynamic map services which will be used to overlay on top >> of >> the first service. >> >> I am using the XYZ and ArcGIS93Rest respectively to do the same. The maps >> do >> display but their images arent synchronised. Meaning, the tiled layer >> image >> comes up on the top left part of the screen, and the export map from the >> Rest service comes up in the centre and larger than the tiled map. >> >> I tried tweaking around with the resolution param which didnt help much. >> The >> maps moved a bit closer until 4000 then they started moving apart. >> Setting >> this to "auto" didnt help either. The SRS is the same for both services. >> As >> are the map initial and final extents. >> >> Can any one please let me know if I am doing something wrong out here? > > the XYZ layer requires you to have correct maxExtent and maxResolution > properties matchingthe grid set up in the tile cache creation > configuration. > Without this information, they will not line up. Your Tile Cache metadata > may provide this information, or you may need to consult some othr > resource > to find it. Sharing a link to the tiles you are trying to use, as well as > the code you are using to try to use thm, may be helpful. > > Best Regards, > -- > Christopher Schmidt > MetaCarta > _______________________________________________ > Users mailing list > [email protected] > http://openlayers.org/mailman/listinfo/users > > -- View this message in context: http://n2.nabble.com/Using-Openlayers-with-Tile-and-Export-Image-doesnt-%22overlap%22-tp3436851p3457473.html Sent from the OpenLayers Users mailing list archive at Nabble.com. _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
