Hi, if you want to use SphericalMercator with Google Maps, then you can only use the resolutions of Google Maps. They deliver their maps only in this resolutions. Mit freundlichen Grüssen
Arnd Wippermann http://gis.ibbeck.de/ginfo/ _____ Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Linda Rawson Gesendet: Freitag, 16. November 2007 15:18 An: [email protected] Betreff: [OpenLayers-Users] Changing Resolution in Spherical Mercator I am using the following to define my map: options = { projection: "EPSG:900913", units: "m", maxResolution: 156543.0339, numZoomLevels: 18, maxExtent: new OpenLayers.Bounds(-20037508, -20037508, 20037508, 20037508.34) }; map = new OpenLayers.Map('map',options); Then my layer: var sat = new OpenLayers.Layer.Google( "Google", {'sphericalMercator': true} ); What the sphericalMercator true does is run the initMercatorParameters: function() { // set up properties for Mercator - assume EPSG:900913 this.RESOLUTIONS = []; var maxResolution = 156543.0339; for(var zoom=0; zoom<= this.MAX_ZOOM_LEVEL; ++zoom) { this.RESOLUTIONS[zoom] = maxResolution / Math.pow(2, zoom); } this.units = "m"; this.projection = "EPSG:900913"; }, The maxResolution of 156543.0339 is based on (20037508.34 + 20037508) / 256. I need a different Resolution but I still want the forward and inverse mercator functions to work. Where are all the different places to change the resolution? I need it based on a tile that is not 256 in size. I have tried changing this in initMercatorParameters, the map, but It still does not seem to play nice. Thanks, Linda Rawson
_______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
