[gdal-dev] [GRASS-user] r.out.gdal export with color table for
floating-point values
Otto Dassau
dassau at gbd-consult.de
Mon Aug 1 09:40:56 EDT 2011
Hi,
fowarded from grass list, because it is probably better here with some
additional notes:
I used Float32 as data type for the export to ERDAS Img, so the data a
floating point and there is a color table but the colortable does not reflect
the floating point data.
Color Table (RGB with 174 entries)
0: 0,191,191,255
1: 58,151,105,255
2: 59,152,105,255
3: 60,153,105,255
4: 61,154,105,255
5: 62,155,104,255
6: 64,156,104,255
Is it possible somehow to adjust the colortable after the GRASS export to get
a color table that distinguishes floating point values as it does in GRASS?
thanks a lot
Otto
Am Fri, 22 Jul 2011 09:18:53 +0200
schrieb Otto Dassau <dassau at gbd-consult.de>:
> Hi,
>
> I have an elevation map in GRASS with a color table that distinguishes
> decimal values based on the srtm color table, see below. I only want to
> have the value 0 in aqua, and all values <> 0 shall reflect land below or
> above sea level.
>
> -10 57 151 105
> -0.000001 57 151 105
> 0 aqua
> 0.000001 57 151 105
> 50 117 194 93
> 100 230 230 128
> 200 202 158 75
>
> When I export the raster with r.out.gdal (nor now I used GeoTiff and ERDAS
> Img) the color table seems to be changed to reflect "only" integer values.
> so all 0 floating point values are displayed as aqua.
>
> Is there a solution for this?
>
> Thanks a lot
> Otto
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