On Tue, Feb 5, 2013 at 9:34 PM, lysgaard <[email protected]> wrote:
> Hi, I'm working for the OAM project to create an open aviation map.
> One feature that is qute special for aviation maps is MORA grid heights.
> http://en.wikipedia.org/wiki/MORA_(aviation)
> <http://en.wikipedia.org/wiki/MORA_(aviation)>
> To calculate these I need to extract the biggest elevation within a lat lon
> square.
> Right now I've got the elevation data from the NASA SRTM set in Geoserver.
> Anyone
> know how to extract the largest height in a square from this using
> Geoserver?
>
You'll have to write a WPS process, probably one wrapping the
Extrema operation, which should give you min and max,
and then chain it with the existing CropCoverage operation that will
allow you to restrict the operation to the desired area.
The CropCoverage process is probably a good template for that:
https://github.com/geotools/geotools/blob/master/modules/unsupported/process-raster/src/main/java/org/geotools/process/raster/CropCoverage.java
Cheers
Andrea
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