I am having a problem with a WMS layer lining up on top of a Google map. It appears to be about 15mi south of were it needs to be. I am assuming this is because of the fact that spherical mercator ignores the fact the earth is an ellipse. Anyway, I have included my openlayers code and my mapfile as after spending hours search seems to be helpful.
I get the same results using either a shapfile or postgis data each with a different projection. I am using what I believe to be the best method. If I use "reproject:true" the map does line up, but that causes other known problems and is deprecated. Any help would be greatly appreciated. --------MAPFILE---------- MAP NAME "Test Map" SIZE 256 256 MAXSIZE 40096 UNITS feet DEBUG ON DEBUG 5 CONFIG "PROJ_LIB" "/usr/local/share/proj" CONFIG "MS_ERRORFILE" "/tmp/mapserver.log" EXTENT -10899765.713460 3586328.494261 -10787636.706166 3654203.662907 PROJECTION "init=epsg:900913" END IMAGECOLOR 255 255 255 IMAGEQUALITY 85 IMAGETYPE AGGA OUTPUTFORMAT NAME AGGA DRIVER 'AGG/PNG' MIMETYPE 'image/png' IMAGEMODE RGBA EXTENSION 'png' #FORMATOPTION "QUANTIZE_FORCE=on" #FORMATOPTION "QUANTIZE_COLORS=256" FORMATOPTION "QUANTIZE_NEW=on" END LAYER NAME 'cities' TYPE POLYGON DUMP true PROCESSING "CLOSE_CONNECTION=DEFER" CONNECTIONTYPE postgis CONNECTION "dbname='regnumvisum' host=localhost port=5432 user='ecweb' password='tklM3E1m0' sslmode=disable" DATA 'limits FROM "maps_city" USING UNIQUE id USING srid=4326' METADATA 'ows_title' 'parcels' 'wms_srs' 'EPSG:900913 EPSG:3785' 'wms_format' 'image/png' END STATUS ON TRANSPARENCY 50 PROJECTION "init=epsg:4326" END CLASSITEM 'id' CLASS NAME 'default' STYLE SYMBOL 0 SIZE 7.0 OUTLINECOLOR 255 255 255 COLOR [color] ANTIALIAS TRUE END END END LAYER NAME 'cities-shp' TYPE POLYGON DUMP true DATA /Users/bheathr/EdenicConfluence/sample_files/Unified METADATA 'ows_title' 'parcels' 'wms_srs' 'EPSG:900913 EPSG:3785' 'wms_format' 'image/png' END STATUS ON TRANSPARENCY 50 PROJECTION "init=epsg:2277" END CLASSITEM 'OBJECTID' CLASS NAME 'default' STYLE SYMBOL 0 SIZE 7.0 OUTLINECOLOR 255 255 255 COLOR 0 0 0 ANTIALIAS TRUE END END END END ---------MAPFILE------------- ---------Open Layers--------- function init(){ var options = { projection: "EPSG:900913", units: "ft", maxResolution: 156543.0339, maxExtent: new OpenLayers.Bounds(-20037508, -20037508, 20037508, 20037508) }; map = new OpenLayers.Map('map', options); var gmap = new OpenLayers.Layer.Google( "Google Streets", {'sphericalMercator': true} ); cities = new OpenLayers.Layer.WMS("Bell Cities", "http://localhost/cgi-bin/mapserv ", {'map': '/Users/bheathr/EdenicConfluence/regnumvisum/etc/test.map', 'layers': 'cities-shp', 'format':'png'}, {'reproject': false, 'opacity': 0.4, 'isBaseLayer': false, 'wrapDateLine': true}); // create a vector layer for drawing vector = new OpenLayers.Layer.Vector("Editable Vectors"); map.addLayers([gmap, cities]); map.addControl(new OpenLayers.Control.LayerSwitcher()); centerMap(-97.67112,30.974599,-97.18326,31.18982); } function centerMap(top,left,bottom,right) { var proj = new OpenLayers.Projection("EPSG:4326"); var bounds = new OpenLayers.Bounds(top,left,bottom,right); bounds.transform(proj, map.getProjectionObject()); if (!map.getCenter()) map.zoomToExtent(bounds); } ---------Open Layers---------
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