We are seeking an open source solution for dynamic (on the fly) IDW or Kriging points interpolation.

Basically we are looking for something similar to ArcGIS Spatial Analysis Service.

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Interpolation can be performed in the browser or on the server side.


How about using GDAL_Grid? Just pass the arguments over to GDAL and return the raster file or render it in the web browser.

It does IDW, Nearest neighbor, and averaging and has a robust set of input parameters.

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You could set up a Web Processing Service (WPS) with Zoo-project.org and GRASS GIS. For pointers, see http://grasswiki.osgeo.org/wiki/Interpolation - "Reinterpolation of 'sparse' (scattered points or lines) maps" and also http://grasswiki.osgeo.org/wiki/WPS. QGIS offers a WPS client which you can then run to use your WPS interpolation service.

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