Tyler, NAD27 and ATS77 don't seem to share the same ellipsoid. spatialreference.org lists ATS77 as +proj=sterea +lat_0=47.25 +lon_0=-63 +k=0.999912 +x_0=700000 +y_0=400000 +a=6378135 +b=6356750.304921594 +units=m +no_defs
It's missing a +towgs84= or +nadgrids= BUT Notice the ellipsoid a and b parameters do not match the NAD27 clarke66 ellipsoid. So a nadgrids shift file for NAD27, will not work for ATS77. Steve -- Sent from: http://osgeo-org.1560.x6.nabble.com/QGIS-User-f4125267.html _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user