Yes, I definitely see similar oddities in this scenario (UTM Zone 8 to USAK). My reprojected imagery was getting severely clipped and often times would not appear at all when zoomed in. Sounds like an issue to send to Autodesk product support or to add to Trac when the next revision of MGOS is released.
Andy -----Original Message----- From: mapguide-users-boun...@lists.osgeo.org [mailto:mapguide-users-boun...@lists.osgeo.org] On Behalf Of Plantech Sent: Monday, April 13, 2009 6:26 PM To: mapguide-users@lists.osgeo.org Subject: RE: [mapguide-users] Raster re-projection pretest Andy, Here's a link to the attachment: http://ialp.airplanonline.com/Files/MGE2010_Reprojection.jpg It would be interesting if you could try setting a blank map to Alaska Albers projection USAK (Alaska; NAD27 Albers Equal Area, 1:2,000,000 DLG Files, Meter) and bringing in your UTM Zone 8 images to see if you get the clipping. Jer I can't help much with your issue, but wanted to comment that the area I was also testing in was Southeast Alaska. I was reprojecting UTM Zone 8 images to AK-1 (NAD27). It's funny that you're working in the same relative area. By the way, your attachments did not come through to the mailing list. Try posting a link to them instead. Andy Morsell, P.E. Spatial Integrators, Inc. www.SpatialGIS.com -----Original Message----- From: mapguide-users-boun...@lists.osgeo.org [mailto:mapguide-users-boun...@lists.osgeo.org] On Behalf Of Plantech Sent: Monday, April 13, 2009 7:12 AM To: mapguide-users@lists.osgeo.org Subject: Re: [mapguide-users] Raster re-projection pretest I also have tried the raster on the fly reprojection within the MGE 2010 environment. While it works as you note I noticed a problem with perhaps certain projections. On a project in Alaska, I have my source ECW aerial files in AK83-1F, Alaska State Plane. My map coordinate system is Alaska NAD27 Albers Equal Area. From a view where the aerial is completely within the display with about 25% white space outside of the borders, the complete aerial displays properly. However, if I zoom in past the borders of the aerial, I start getting truncating of strips of the aerial along each side, leaving white space. These appear related to the rotation of the reprojection. If I use LL83 for my base coordiate system, I don't seem to have the problem. There also not as much rotation on this reprojection. I have attached screenshots of this comparison. Realizing that MGE 2010 is just out, has anybody else seen this? Would this be common with MGOS? Jer I wanted to provide some positive feedback to the group about a particular feature that I've been looking forward to. I just installed the release version of MapGuide Enterprise 2010. It includes some features not in the current release of MGOS, but those features will be in the upcoming release (2.1) which is due next week. RFC 51 (http://trac.osgeo.org/mapguide/wiki/MapGuideRfc51) provides support for raster re-projection. Meaning, you can leave rasters images in their native coordinate system and it will re-project them to the map coordinate system on the fly. I just quickly tested it with a couple of 100 MB TIF's that are in UTM while my map was in a State Plane coordinate system. It worked. It wasn't very fast, but it worked. I then converted the images to my preferred format of ECW (both about 70 MB) and it was screaming fast with the re-projection. I'm talking less than a second response time. Holy cow. And, it correctly saw the null background values and ignored them so the resulting mosaic of the two images looked great. I'm impressed. Hats off to the developers for this feature. (quick disclaimer: this test was done with the Autodesk Raster Provider. I assume it will work as well with the GDAL Raster Provider) Andy Morsell, P.E. Spatial Integrators, Inc. www.SpatialGIS.com _______________________________________________ mapguide-users mailing list mapguide-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapguide-users MGE2010_Reprojection.jpg -- View this message in context: http://n2.nabble.com/Raster-re-projection-pretest-tp2601952p2627911.html Sent from the MapGuide Users mailing list archive at Nabble.com. _______________________________________________ mapguide-users mailing list mapguide-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapguide-users _______________________________________________ mapguide-users mailing list mapguide-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapguide-users -- View this message in context: http://n2.nabble.com/Raster-re-projection-pretest-tp2601952p2630709.html Sent from the MapGuide Users mailing list archive at Nabble.com. _______________________________________________ mapguide-users mailing list mapguide-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapguide-users _______________________________________________ mapguide-users mailing list mapguide-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapguide-users
