topic Re: transform/georeference raster that already projects on the fly in Canadian GIS Professionals Questions https://community.esri.com/t5/canadian-gis-professionals-questions/transform-georeference-raster-that-already/m-p/705603#M2 <HTML><HEAD></HEAD><BODY><P>Normally one would reply with ... 'its a datum shift problem' ... but I doubt that applies in this case (unless it does!?!)</P><P>Alternately, is there some possibility that the extents are based on something else, like cell centers versus cell corners?&nbsp; And of course this assumes that everything is indeed in the same coordinate system.</P></BODY></HTML> Mon, 20 Jun 2016 16:04:01 GMT DanPatterson_Retired 2016-06-20T16:04:01Z transform/georeference raster that already projects on the fly https://community.esri.com/t5/canadian-gis-professionals-questions/transform-georeference-raster-that-already/m-p/705602#M1 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P>I'm working with Mars raster data; my basemaps are HiRISE and CTX raster images projected to Mars_Equirectangular (the standard used for Martian geomatics). I have a raster image imported from ENVI that already has all of its georeferencing included, so when it gets added to my map it projects on the fly. Problem is, it's a few (10s-100s) meters off from where it should be based on the HiRISE images below it. How can I transform or re-georeference it to the lower image?</P></BODY></HTML> Mon, 20 Jun 2016 14:05:53 GMT https://community.esri.com/t5/canadian-gis-professionals-questions/transform-georeference-raster-that-already/m-p/705602#M1 CatherynRyan 2016-06-20T14:05:53Z Re: transform/georeference raster that already projects on the fly https://community.esri.com/t5/canadian-gis-professionals-questions/transform-georeference-raster-that-already/m-p/705603#M2 <HTML><HEAD></HEAD><BODY><P>Normally one would reply with ... 'its a datum shift problem' ... but I doubt that applies in this case (unless it does!?!)</P><P>Alternately, is there some possibility that the extents are based on something else, like cell centers versus cell corners?&nbsp; And of course this assumes that everything is indeed in the same coordinate system.</P></BODY></HTML> Mon, 20 Jun 2016 16:04:01 GMT https://community.esri.com/t5/canadian-gis-professionals-questions/transform-georeference-raster-that-already/m-p/705603#M2 DanPatterson_Retired 2016-06-20T16:04:01Z