The OCaml Journal just published an article about parsing binary data:
"Detailed vector descriptions of worldwide geographical data are freely available in the Shapefile format. This article describes how polygonal data can be parsed from the binary Shapefile format and visualized using OpenGL and GLU easily and efficiently with OCaml. The result is a simple program that can be used as the basis for a wide variety of Geographic Information System (GIS) applications from cartography to climatology..."
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