[mapserver-users] Mapserver + WMS
Carl Godkin
cgodkin at gmail.com
Thu Oct 7 16:12:31 PDT 2021
Hi,
I'm new to mapserver but fairly experienced with GDAL. I hope that someone
can explain where I've gone wrong with setting up WMS.
I followed the instructions here [
https://worldwind.earth/elevation-server.html] almost exactly to set up a
WMS server and it sort of works. (I am using MS4W actually, so I didn't
install Apache & Mapserver as that page described and of course I made a
few other adaptations for Windows.)
I downloaded the GEBCO tiles from here [
https://www.gebco.net/data_and_products/gridded_bathymetry_data/] without
any problems.
What I don't understand is that while the GEBCO GeoTIFF files that I am
using have one band that gdalinfo describes as
Band 1 Block=512x512 Type=Int16, ColorInterp=Gray
when I look at the WMS bands using gdalinfo, I see three byte-sized bands:
Band 1 Block=1024x1024 Type=Byte, ColorInterp=Red
Band 2 Block=1024x1024 Type=Byte, ColorInterp=Green
Band 3 Block=1024x1024 Type=Byte, ColorInterp=Blue
I'd really like to get 16-bit integer elevations from my WMS server but I
don't know why this didn't just happen or how I mis-configured things to
make it not happen.
I know these are not complete details, but rather than write a novel for my
first post here, I'm hoping someone can suggest where the problem might be
or suggest some further documentation to read.
Thanks very much,
carl
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