Efficient, polymorphic Map Algebra. This library is an implementation of Map Algebra as described in the book GIS and Cartographic Modeling by Dana Tomlin. The fundamental type, the Raster, is typesafe. Rasters of different size and projection are considered different types, and so cannot be combined mistakenly in any way. Also featured are op fusion (i.e. "lazy Rasters"), extremely fast Focal Operations, and typesafe NoData handling. Please see the main module for a more detailed introduction.