[QGIS-trac] [Quantum GIS] #3049: GdalTools: merging images with different colormaps

[Quantum GIS]

#3049: GdalTools: merging images with different colormaps
------------------------------------------------+---------------------------
   Reporter:  brushtyler                        |              Owner:  brushtyler   
       Type:  bug                               |             Status:  new          
   Priority:  major: does not work as expected  |          Milestone:  Version 1.6.0
  Component:  Python plugins and bindings       |            Version:               
   Keywords:  gdaltools, merge, colormaps       |   Platform_version:               
   Platform:  All                               |           Must_fix:  No           
Status_info:  0                                 |  
------------------------------------------------+---------------------------
 To mosaic colormapped images with different colormaps, you need to first
 convert the images to 24bit RGB format (with pct2rgb.py).

 So, in the gdal tools merge tool would be nice to

 add and advice

 or

 add a test to see if the problem occurs and then throw a warning

 Note that a similar problem occurs also with gdalbuildvrt: the resulting
 colormap is the one of the first input raster. The result is a raster with
 a wrong colormap in at least 50% of its extensions.

-- 
Ticket URL: <https://trac.osgeo.org/qgis/ticket/3049>
Quantum GIS <http://qgis.org>
Quantum GIS is an Open Source GIS viewer/editor supporting OGR, PostGIS, and GRASS formats