Andy, It looks like you have data in at least two or three different projections. If you want to display them in the same map using MapServer, you need:
- a projection block at the MAP level. This defines your output projection. The map UNITS and EXTENT need tobe consistent with this projection. - a projection block for each layer. This is used to tell MapServer what projection the data for that layer is currently in. MapServer then uses this info to warp all of the layers into the same output projection. Does this help? Are these all publicly available datasets? David. -----Original Message----- From: mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Andy Colson Sent: Monday, February 08, 2010 10:11 AM To: mapserver-users Subject: [mapserver-users] many raster projections Ok, I'm confused. Most of the problem is probably because I'm a programmer, not a mapper. I have arial imagery of Minnesota, multiple sets, each seeming to be in a different projection. At the top of my mapfile I have this: MAP EXTENT 1285920 1377857 1426390 1506589 PROJECTION "+proj=tmerc +lat_0=35.83333333333334 +lon_0=-92.5 +k=0.999933333 +x_0=500000 +y_0=0 +ellps=GRS80 +units=m +no_defs" END There are no other PROJECTION settings. Most of the images seem to work. I got the projtext above from loading one of the shapefiles into qgis and looking at its properties. I just kinda hoped they'd all be the same. I did try adding a PROJECTION to the raster layer, but it didnt seem to work. So I thought I'd "just" re-project the imagery. Three sets of imagery seem to work (I didnt touch them, they always worked), they have (again copied from qgis) proj text's of: +proj=tmerc +lat_0=35.83333333333334 +lon_0=-92.5 +k=0.999933333 +x_0=500000.0000000001 +y_0=0 +ellps=GRS80 +datum=NAD83 +to_meter=0.3048006096012192 +no_defs +proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs and +proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs One set is displayed way off the map, way far away from where its supposed to be. Its projtext is: +proj=utm +zone=15 +ellps=GRS80 +datum=NAD83 +units=m +no_defs I attempted to use gdal_translate and gdal_warp. gdal_translate made a new image, with projtext: +proj=tmerc +lat_0=35.83333333333334 +lon_0=-92.5 +k=0.999933333 +x_0=500000 +y_0=0 +ellps=GRS80 +units=m +no_defs but its in the exact same spot, it didnt re-position to where images are supposed to be. A gdalwarp moved it, but not to the right place. So I'm confused, and not sure what I'm doing. Hopefully there is some info in here someone can use to set me on the right path. Any help would be appreciated. -Andy _______________________________________________ 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