Admin wrote:
Hi, I have to get maximum and minimum height from DTED file. MapServer
render it as 8bit gray image. Thats ok, but i also need some information
about height of this map. When i open my dted file in OpenEV and i go to the
layer properties (Raster Source tab) i see values for Scale Min: and Scale
Max:, that means that in dted are stored height information, but when i use
gdalinfo i don't see this information. I wrote simple additional cgi
program, which have to return me hight information (it will be using
external application such as gdalinfo, ogrinfo or something else), but i
don't know which console program from FWTools can i use to get this max and
min height. Have you got any idea how do this?
"Admin Mail Deamon",
OpenEV does not get the min/max for scaling from the image header, it samples
the image and does various computations with the resulting histogram.
To get the exact min/max with gdalinfo pass the -mm switch to compute the
min and max by scanning the whole image.
Best regards,
--
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