Hi,<br><br>I am using Openlayers with Mapserver to show a shapefile of roads in MN that are in epsg:26915 and allowing users to toggle between that and Google Maps (spherical Mercator projection per <a href="http://spatialreference.org/ref/user/google-projection/">http://spatialreference.org/ref/user/google-projection/</a>). I use mapserv.exe and a .map file to reproject the MN roads into the Google projection, and when I toggle between them, the extents *almost* match up. It appears that the MN roads extent covers a slightly larger area than the Google Maps extent.<br>
<br>I don't know if this is an OpenLayers or Mapserver question, but I'm thinking it is a Mapserver one. Can anyone tell me why the extents *almost* match up? I would think that they would either match up almost exactly (or at least in a tolerance that I cannot tell by the naked eye), or I would have messed up my transformations, and it would be completely out of sync. Is it a function of disparities in the data that I cannot fix, or are there fine tunings that I can adjust to compensate?<br>
<br>Thanks,<br>Matt<br clear="all"><br>-- <br>It is from the wellspring of our despair and the places that we are broken that we come to repair the world.<br>-- Murray Waas