Re: [mapserver-users] accessing different band values in the same layer
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 hsansegu...@meteo.cat 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 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
Re: [mapserver-users] accessing different band values in the same layer
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 Navazohsansegu...@meteo.cat 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 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
Re: [mapserver-users] accessing different band values in the same layer
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 hsansegu...@meteo.cat 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 Navazohsansegu...@meteo.cat 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 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 ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
