rasdaman: fast raster calc

[bbest]

http://www.rasdaman.org: world's most flexible and scalable Array Engine

rasdaman integrates smoothly with R, OpenLayers, Leaflet, NASA WorldWind, GDAL, MapServer, ESRI ArcGIS, and many more

• http://www.earthserver.eu/

[bbest]

Alternative:

• GreenInfo-Network/L.TileLayer.PixelFilter: Leaflet TileLayer extension which can filter out pixels to provide a mask or color-swapping