I have a reasonably large grey-scale geotiff file with elevation data
(float32). I would like to
display a colorized version of this map. The colors need to be computed
dynamically because
the data range varies considerably with the zoom factor. I am using
mapserevr 5.6.3 but am
willing to upgrade if this would solve my problems.
So far I tried the following:
IMAGETYPE png
SIZE 740 550
LAYER
DATA "xxx.tif"
NAME xxx
OFFSITE 255 255 255
STATUS ON
TYPE RASTER
PROCESSING "SCALE=AUTO"
END
This works (no color of course) but seems to scale always several 256x256
pixel regions independently
Adding
CLASS
STYLE
COLORRANGE 255 0 0 0 0 255
DATARANGE 0 1000
END
END
works but not dynamically. Adding
PROCESSING "SCALE=0,1000"
also does not help. I had hoped that the data would be scaled before colors
were added but
it seems the colorization always acts on the original data values.
For now something like
DATARANGE auto
would be enough, having mapserver compute min and max value of the selected
area and then
adding colors accordingly.
All suggestions are welcome. (Especially those which do not require writing
patches.)
Thanks in advance
- Till
_______________________________________________
mapserver-users mailing list
mapserver-users@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/mapserver-users
