[QGIS-trac] Re: [Quantum GIS] #1929: transparency of 0 value do not apply to GDAL virtual rasters (vrt)

Quantum GIS qgis at qgis.org
Tue Sep 15 16:18:40 EDT 2009


#1929: transparency of 0 value do not apply to GDAL virtual rasters (vrt)
-----------------------------------------------------+----------------------
        Reporter:  pcav                              |         Owner:  ersts        
            Type:  bug                               |        Status:  assigned     
        Priority:  major: does not work as expected  |     Milestone:  Version 1.4.0
       Component:  Rasters                           |       Version:  HEAD         
      Resolution:                                    |      Keywords:               
Platform_version:                                    |      Platform:  All          
        Must_fix:  No                                |   Status_info:  1            
-----------------------------------------------------+----------------------
Changes (by ersts):

  * owner:  nobody => ersts
  * status:  new => assigned
  * status_info:  0 => 1

Comment:

 Paolo,

 I just fired up your vrt dataset on a linux box (Ubuntu 9.04 - stock GDAL)
 running QGIS trunk r11665.

 In the color table, 0 = white (255,255,255) and 1 = black(0,0,0). When I
 added [0, 100%] to the transparency table all of the white was removed. As
 I only had your virtual raster loaded I had to change the background of
 the map canvas to another color, but the transparency seem to work as
 expected.

 Are you running on windows or linux? version 1.3.0?

-- 
Ticket URL: <https://trac.osgeo.org/qgis/ticket/1929#comment:1>
Quantum GIS <http://qgis.org>
Quantum GIS is an Open Source GIS viewer/editor supporting OGR, PostGIS, and GRASS formats


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