We have a requirement to override the pickFeatures function in WebMapServiceImageryProvider (well, pickFeatures is actually in the UrlTemplateImageryProvider etc). We'd like to replace it with a call to a WPS process that returns values in JSON. At the moment, I've monkey-patched it to get our implementation working but I think someone must have done this before?
(We need to do this as GetFeatureInfo returns some basically useless rgb values from geotiffs - we want to access the underlying data which is in netcdf, hence the call to the WPS instead).
Cheers and thanks!