Hi, Use the -dstnodata parameter with gdalwarp http://gdal.org/gdalwarp.html Then use the same value in LAYER OFFSITE http://mapserver.org/mapfile/layer.html Note that this works perfectly only if the warped images are in some lossless format. In jpeg, ecw etc. the nodata gets also slightly different RGB values and some pixels are then not transparent in Mapserver.
I have never tried alpha channels for masking the nodata area and I can't say it works with Mapserver. -Jukka Rahkonen- ________________________________________ aphunter wrote: > Hi there. I used gdalwarp to warp one of the zones into the spatial reference > system of the other, and everything lined up. The only issue now is that > each image seems tilted, and so there is a lot of black space on the warped >pyramid. > Is there any way to prevent this from happening? > http://osgeo-org.1803224.n2.nabble.com/file/n6825717/out.jpg > http://osgeo-org.1803224.n2.nabble.com/file/n6825717/noalpha_m_3211401_ne_11_1_20090525_1_1.jpg -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Image-Pyramid-with-gdal-retile-and-two-UTM-zones-tp6812832p6825717.html Sent from the Mapserver - User mailing list archive at Nabble.com. _______________________________________________ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users _______________________________________________ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
