Hi
So, I have a single band geotiff with float32 values. Opening it
directly in eg. QGIS, this looks fine.
I define various styles with fixed colors for pixels with defined value
range for this looking as expected, but then I define a kind of
grayscale style looking like this in mapfile:
CLASS
NAME "orig"
GROUP "GRAYSCALE"
STYLE
RANGEITEM "pixel"
COLORRANGE 0 0 0 255 255 255
DATARANGE -31.500000 96.000000
END # STYLE
END # CLASS
however the resulting image is partly grayscale and spottet with light
blue pixels. Please see the attached image link how it looks:
https://drive.google.com/file/d/1JfyCL047JngCJh44jpa7Ei7a5wqhihOM/view?usp=share_link
So I think I do something wrong defining the grayscale style like this.
I tried to ask for the SLD for to see what mapserver makes for me, but
alas, no luck. If a do a GetStyles request I only get an empty SLD
document:
curl
'http://localhost:8000/?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetStyles&LAYERS=layer-name'
<StyledLayerDescriptor version="1.1.0"
xsi:schemaLocation="http://www.opengis.net/sld
http://schemas.opengis.net/sld/1.1.0/StyledLayerDescriptor.xsd";
xmlns="http://www.opengis.net/sld";
xmlns:ogc="http://www.opengis.net/ogc";
xmlns:se="http://www.opengis.net/se";
xmlns:xlink="http://www.w3.org/1999/xlink";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";>
</StyledLayerDescriptor>
So someone have an idea why my image looks spotty when expecting a
grayscale image and why do I get an empty SLD?
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