[QGIS-trac] [Quantum GIS] #1816: NDVI colors not shown correctly

[Quantum GIS]

#1816: NDVI colors not shown correctly
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   Reporter:  pcav                              |              Owner:  rugginoso    
       Type:  bug                               |             Status:  new          
   Priority:  major: does not work as expected  |          Milestone:  Version 1.2.0
  Component:  GRASS                             |            Version:  HEAD         
   Keywords:                                    |   Platform_version:               
   Platform:  All                               |           Must_fix:  No           
Status_info:  0                                 |  
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 I'm following:
 http://trac.osgeo.org/grass/wiki/HowToTestGrass6
 All fine, but for the fact that the calculated ndvi map appears on grey
 scale, and applying the ndvi color table does not change it.
 /usr/lib/grass64/etc/colors/ndvi seems ok:

 -1.000   5  24  82
 -0.300   5  24  82
 -0.180 255 255 255
  0.000 255 255 255
  0.025 206 197 180
  0.075 191 163 124
  0.125 179 174  96
  0.150 163 181  80
  0.175 144 170  60
  0.233 166 195  29
  0.266 135 183   3
  0.333 121 175   1
  0.366 101 163   0
  0.433  78 151   0
  0.466  43 132   4
  0.550   0 114   0
  0.650   0  90   1
  0.750   0  73   0
  0.850   0  56   0
  0.950   0  31   0
  1.000   0   0   0

 And in fact in GRASS the same layer is shown correctly.
 This has been tested by at least three people, in different Linux distros.

 I get these warnings:
 Warning: QPainter::setPen: Painter not active
 Warning: QPainter::setFont: Painter not active
 Warning: QPainter::end: Painter not active, aborted
 Warning: QPixmap::scaled: Pixmap is a null pixmap
 Warning: Object::connect: No such signal
 QgsRasterLayer::editingStarted() in
 /storage/build/qgis_unstable/src/app/legend/qgslegend.cpp:548
 Warning: Object::connect: No such signal
 QgsRasterLayer::editingStopped() in
 /storage/build/qgis_unstable/src/app/legend/qgslegend.cpp:549

 But I do not know if they are relevant.

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Ticket URL: <https://trac.osgeo.org/qgis/ticket/1816>
Quantum GIS <http://qgis.org>
Quantum GIS is an Open Source GIS viewer/editor supporting OGR, PostGIS, and GRASS formats