Re: [mapserver-users] Mapfile classifying using two separate raster files?
You might be able to virtually combine those two rasters into one using GDAL's VRT format (http://www.gdal.org/gdal_vrttut.html). HTH -Ursprüngliche Nachricht- Von: mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users- boun...@lists.osgeo.org] Im Auftrag von Matt McClelland Gesendet: Donnerstag, 23. Juli 2015 08:54 An: mapserver-users@lists.osgeo.org Betreff: [mapserver-users] Mapfile classifying using two separate raster files? Hi I have two raster files one for vegetation and one for population density. The two rasters (tif's) are at different scales I am using value based classification to paint the map green where vegetation values are high. Is there a way I can classify based on values from the two separate files in the same layer I can't see how this will work as you can only have one data item per layer?? (but worth asking) I am wanting to be able to do something like EXPRESSION ([veg] = 50 and [population] 500) The only option I can think of is to make the two files into a single multiband tiff? This seems wasteful as one is much lower resolution then the other. thoughts?? thanks Matt :) http://www.wildwalks.com/office/newsletters/ ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
[mapserver-users] Mapfile classifying using two separate raster files?
Hi I have two raster files one for vegetation and one for population density. The two rasters (tif's) are at different scales I am using value based classification to paint the map green where vegetation values are high. Is there a way I can classify based on values from the two separate files in the same layer I can't see how this will work as you can only have one data item per layer?? (but worth asking) I am wanting to be able to do something like EXPRESSION ([veg] = 50 and [population] 500) The only option I can think of is to make the two files into a single multiband tiff? This seems wasteful as one is much lower resolution then the other. thoughts?? thanks Matt :) http://www.wildwalks.com/office/newsletters/ ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] Mapfile classifying using two separate raster files?
I would try to do a VRT file that describes both raster files and work with that. I don't have an good example but maybe this could get You started together with the GDAL docs. http://www.paolocorti.net/2012/03/08/gdal_virtual_formats/ /Lars S. Matt McClelland skrev den 2015-07-23 08:54: Hi I have two raster files one for vegetation and one for population density. The two rasters (tif's) are at different scales I am using value based classification to paint the map green where vegetation values are high. Is there a way I can classify based on values from the two separate files in the same layer I can't see how this will work as you can only have one data item per layer?? (but worth asking) I am wanting to be able to do something like EXPRESSION ([veg] = 50 and [population] 500) The only option I can think of is to make the two files into a single multiband tiff? This seems wasteful as one is much lower resolution then the other. thoughts?? thanks Matt :) ___ 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
