GeoRuby

GeoRuby provides data types intended to hold data returned from PostGIS and the Spatial Extensions of MySql. The data model roughly follows the OGC Simple Features for SQL specification, although without any kind of advanced functionalities (such as geometric operators or reprojections). The library inputs and outputs EWKB, HexEWKB and EWKT. A recent version also includes input and output of GeoRSS and KML. The latest version has added support for reading ESRI shapefiles