id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc,external_id 2550,RFC 140 Errata,jng,jng,"According to the original RFC 140, I wrote the following about the XYZ tile provider {{{ The ""XYZ"" provider implements tile rendering and access using the XYZ tiling scheme. Coordinate System is always LL84 ... }}} In further tests, this is proved to be incorrect. The actual Cooordinate System should actually always be WGS84.PseudoMercator Having a LL84 coordinate system for XYZ tile sets produces tiles with noticeable visual distortion, whereas tiles from XYZ tile sets with a WGS84.PseudoMercator coordinate system have more crisp visual fidelity. Attached is: * A visual comparison of two different XYZ tile sets in both LL84 and WGS84.PseudoMercator coordinate systems * A patch to set the correct coordinate system to WGS84.PseudoMercator instead of LL84 From a client tooling perspective, tile sets should be working against the WGS84.PseudoMercator coordinate system instead of LL84 in terms of tile set extents being set and/or transformed.",defect,closed,low,3.0,Tile Service,,trivial,fixed,,,