Has anyone experimented with using Geoserver as a raster overlay engine?
I can think of two ways this might work:
1. Use the SLD compositing capabiity
2. Render layers as two or multi-valued images, and then use client-side
image processing code to combine the rasters
An ability to support even the most basic binary-valued raster overlay
could be useful for simple overlay queries. Adding in tile
pyramiding/caching might allow supporting very large raster overlays.
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