On 06/02/13 19:54, Andrea Aime wrote:
> On Tue, Feb 5, 2013 at 9:34 PM, lysgaard <[email protected]
> <mailto:[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_%28aviation%29>
> <http://en.wikipedia.org/wiki/MORA_(aviation)
> <http://en.wikipedia.org/wiki/MORA_%28aviation%29>>
> 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.
I see. but would this allow to generate the maximum value for each 1x1
degree grid somehow?
basically the task is to 'reduce' the SRTM elevation grid into 'one
value per 1x1 degree area' where that value is the max value of all
pixels for that area.
Akos
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