Helen, have you had a look at http://mapserver.org/trunk/input/vector/vector_field.html (to be released in 6.2, but should be functional already)
-- thomas On Thu, Jun 14, 2012 at 3:21 PM, Helen San Segundo Navazo <[email protected]> wrote: > ok, thanks Mike. > A solution could be to transform the raster in a shape file, and to put the > different band values in different attributes of each element, and then use > the attributes values for selecting symbol and angle. > Thanks, > Helen > > El 14/06/12 15:03, Smith, Michael ERDC-RDE-CRREL-NH escribió: > >> Helen, >> >> It does not appear that you can. Based on the docs >> >> Raster classifications always take place on only one raster band. It >> defaults to the first band in the referenced file, but this can be altered >> with the BANDS PROCESSING directive. In particular this means that >> including even a single CLASS declaration in a raster layer will result in >> the raster layer being rendered using the one band classification rules >> instead of other rules that might have applied (such as 3 band RGB >> rendering). >> >> http://mapserver.org/input/raster.html >> >> >> >> You could have multiple layers and do classification on each band by >> changing the first value in the PROCESSING BANDS directive. >> >> Mike >> >> >> On 6/14/12 8:27 AM, "Helen San Segundo Navazo"<[email protected]> >> wrote: >> >>> Hi, >>> I have a raster file with different bands inside it. >>> when I create my mapfile inside the layer tag I can define the bands I >>> want to access with PROCESSING "BANDS=4,2,1" >>> When I select 1 band I can access to its data using the EXPRESSION tag: >>> CLASS >>> NAME "0 - 5" >>> EXPRESSION ([pixel]>= 0 AND [pixel]< 5) >>> STYLE >>> COLOR 80 0 0 >>> END >>> END >>> But if I select more than one band, how can I do to acces to the >>> different band values inside the same EXPRESSION tag? is it possible? >>> >>> The problem is that I have wind information in different bands, in one >>> band I have speed and in other band I have direction, and I have to draw >>> the wind symbol depending on both values. >>> Is possible to acces to the different pixel band values inside the same >>> EXPRESSION tag? >>> Thanks, >>> Helen >>> _______________________________________________ >>> mapserver-users mailing list >>> [email protected] >>> http://lists.osgeo.org/mailman/listinfo/mapserver-users >> >> > > _______________________________________________ > mapserver-users mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/mapserver-users _______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users
