Hi all I have a couple of questions. First off, I am looking at loading OSM as a baselayer, and also offer one or two homebrew ArcGIS server 10.1 WMS baselayers as reference backdrops for digitising polygons. I have EPSG:900913 as the map projection and EPSG:4326 as the display projection (and for all my point/polygon work).
What SRS should I be configuring my new ArcGIS WMSs with (one containing WGS84 data and another containing OSGB data)? To date I have had issues with pink squares etc - which I am sure is me using incorrect projections/transformation combinations. What are the correct EPSG codes to use to get such data showing correctly in OpenLayers with least amount of transformation overhead? Secondly I was going to clip my polygons in SQL Server 2008 post save, having said that can OpenLayers clip a digitised polygon based on any overlap with another layer client-side - e.g. coastline? Many thanks in advance Chris
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