Hello everyone: I am trying to serve tiff images with mapserver by using mapserver v.5.6.5 with WCS implemented protocol v.1.0.0. All is fine in the sense that three-band raster are served correctly with a WCS client (RGB composite renderer with ArcMap, for instance). BUT if I want to display a single band raster with a palette color describing some (discrete) categories, for instance, a thematic raster layer (Corine -- Use and Land covers), the connection to WCS server by using WCS client is fine, but the image is served like a continuos band range instead a discrete colors as corresponding to color table. So my WCS client is not detecting inherent properties in the raster data.
So, at this point I have some doubts: *my mapfile is not well defined *the protocol does not support this and is not suited to serve discrete (unique) values *I am ignorant about how is rendered images with Mapserver Maybe third part is the correct statement. As far as I know built-in libs and GDAL is responsible for rendering raster in Mapsserver. My CGI bin is compiled with GDAL support, so raster will be managed by it; gdalinfo <filename> gives me information about raster layer (land cover) showing a color table with a single band and 255 entries (only 13 categories with different colours). Questions that throw some light for me because I have not found clear directions in docs. I dont know if I have to specify CLASS definition for pixels that indicates classification of pixels in raster (like in ref http://mapserver.org/input/raster.html#how-are-rasters-added-to-a-map-file) could be tedious and I didn´t get it. - I have defined OUTPUTFORMAT object in my mapfile like this: OUTPUTFORMAT NAME 'GEOTIFF' DRIVER "GDAL/GTiff" MIMETYPE "image/tiff" # IMAGEMODE 'INT16' # IMAGEMODE 'PC256' IMAGEMODE 'BYTE' EXTENSION 'tif' END #end BANDS but by using IMAGEMODE 'BYTE' it is rendered like a single-band image with a greyscale (continuous but not discrete). In docs (http://mapserver.org/ogc/wcs_format.html) I have read that IMAGEMODE 'PC256' is needed to serve images with a color table and one single band. - I ignore PROCESSING directive. I dont know if a I should to indicate that how to partitioning band like this PROCESSING "SCALE=0,255" PROCESSING "SCALE_BUCKETS=XXX" to obtain a color table as raster definition. - 'wcs_band_count' '1' 'wcs_nativeformat' '8-bit GeoTIF' Does anyone know how to indicate mapserver to serve raster as 'raw data' ? Some trends how to do it and getting out with this are wellcome. Jorge -- View this message in context: http://osgeo-org.1560.n6.nabble.com/mapserver-palette-color-tp4520887p4520887.html Sent from the Mapserver - User mailing list archive at Nabble.com. _______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users
