Bob,
As Jeff indicates, you need an EXPRESSION in your CLASS, something like:
EXPRESSION ([pixel] > 100)
The EXPRESSION has a look at each of the image's pixel values (and
that's why it's slow)
Best Regards,
Brent Fraser
On 3/5/2013 1:18 PM, Bistrais, Bob wrote:
Yes, I had looked at that webpage and thought I was doing it
correctly. My TIFF is a single band, 8-bit, with no colormap. Still
don't see why it won't display in color.
*From:*Brent Fraser [mailto:[email protected]]
*Sent:* Tuesday, March 05, 2013 3:13 PM
*To:* Bistrais, Bob
*Cc:* [email protected]
*Subject:* Re: [mapserver-users] Trouble coloring a raster
Bob,
I'd recommend just re-rendering the raster off-line for
performance reasons, but if data management makes that difficult have
a look at the "Classifying Rasters" section of
http://www.mapserver.org/input/raster.html#how-are-rasters-added-to-a-map-file.
And Mapserver can only classify a single 8-bit band (grey or
paletted), even if your image is say 3 band RGB.
Best Regards,
Brent Fraser
On 3/5/2013 12:53 PM, Bistrais, Bob wrote:
I have a geotiff raster which represents forested lands. I'd like
it to display in green. I put in a Style section and specified a
color, but try as I might, it always displays in grayscale. It is
an 8-bit unsigned TIFF file.
Below is the layer specification:
LAYER
NAME "ForestLands"
GROUP "ForestLands"
TYPE RASTER
STATUS on
DATA "/mapserver_data/StreamBarriers/forestland06.tif"
METADATA
"wms_srs" "EPSG:4326 EPSG:26919 EPSG:26983 EPSG:26984 EPSG:102113"
"wms_name" "ForestLands"
"wms_server_version" "1.1.1"
"wms_format" "image/png"
END
CLASS
NAME "Forest"
STYLE
COLOR 0 250 0
END
END
END
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