[OSGeo Africa] (no subject)

[Gavin Fleming]

Hi Zibusiso

> On 11 Sep 2017, at 10:24, Zibusiso Ncube <ncubezedm at gmail.com> wrote:
> 
> Map algebra for raster is easy on desktop packages and through hardcoding through Python or R. I want to implement an online solution that takes base data (created on desktop) and does some raster algebra on  it in a web GIS server environment such as GeoServer or MapServer. 

You can do it through GeoServer’s WPS (http://docs.geoserver.org/latest/en/user/services/wps/operations.html), or various other WPS implementations such as PyWPS (http://pywps.org/) where you have all of GRASS raster algebra available, or even QGIS WPS (https://github.com/3liz/qgis-wps4server)

Or try https://geotrellis.io/ 

Gavin


> 
> 
> Basically what I want to achieve is to do simple things like dividing two images and generate a third, ratio image to be displayed in the webpage.
> 
> Is this feasible? If yes... how can this be done and where can I get help or examples. (Preferred server choice is geoserver, if anyone has knowledge about this)
> 
> You assistance/direction  will be greatly appreciated.
> 
> Regards,
> Zibusiso 
> 
> 
> -- 
> Regards
> 
> Zibusiso M Ncube
> 
> 
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