Armin, I am using such application stack: netcdf > vrt and pixel functions > GDAL > MapServer
We have a tiled layer inside PostGIS and we juste configure the layer like all other tiled datasource: LAYER STATUS ON NAME "layer_idx" TYPE POLYGON CONNECTION "dbname=mydb host=localhost user=myUser password=mypassword" CONNECTIONTYPE postgis DATA "the_geom FROM myLayer USING srid=4326" PROJECTION "init=epsg:4326" END METADATA "wms_srs" "EPSG:4326" "wms_timeextent" "2010-12-20/2010-12-26" "wms_timeitem" "datetime" #column in postgis table of type timestamp "wms_timedefault" "2010-12-24T00:00:00Z" "wms_enable_request" "*" END END If you want to use the vrt file directly it is also possible as easily as: DATA "vrt/myLayer.vrt" About register the plugin, in Apache config you have to use SetEnv this way: SetEnv GDAL_DRIVER_PATH directory/mapserver/misc SetEnv MS_MAPFILE directory/mapserver/mymapfile.map SetEnv MS_MAPFILE_PATTERN "^directory/mapserver/mymapfile.map" Hth, Y. Le Mercredi 15 Février 2012 19:52:21 Armin Burger a écrit : > Dear all > > I would be interested in using VRT images with "derived bands" as > described on the VRT image documentation page. This requires the > definition of a pixel function and the registration of this function in > the used application via "GDALAddDerivedBandPixelFunc". > > The provided sample function is already towards what I'm looking for. I > would just need to adapt it accordingly (calculating band 1 as > combination of source band 1 and 3). > > Since my main interest is to use such image definition in the context of > Mapserver, my question is if there could be a way to use this also from > Mapserver as application? If yes, where would I need to register the > function and how would I best make the function available to Mapserver > (maybe via an .o file that is created when compiling)? Maybe somewhere > inside mapgdal.c ? > > Would such a pixel function be used also in case when not the full > resolution image (i.e. TIFF file referenced in the VRT file) is read but > one of the overviews from the .ovr file associated to the Tiff file? > > Thanks in advance for any hints > > Armin > _______________________________________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/gdal-dev -- Yves Jacolin http://yjacolin.gloobe.org _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
