RGeo is a geospatial data library for Ruby. It provides an implementation of the Open Geospatial Consortium's Simple Features Specification, used by most standard spatial/geographic data storage systems such as PostGIS. A number of add-on modules are also available to help with writing location-based applications using Ruby-based frameworks such as Ruby On Rails.

RGeo is a geospatial data library for Ruby. RGeo::ActiveRecord is an optional RGeo module providing some spatial extensions to ActiveRecord, as well as common tools used by RGeo-based spatial adapters.

Proj4 extension for rgeo.

GeoJSON Diff takes two GeoJSON files representing the same geometry (or geometries) at two points in time, and generates three GeoJSON files represented the added, removed, and unchanged geometries.

Use together GeoRuby, Rgeo, Geokit, Proj4j (and others)

Extensions for the GEOS library.

Component for manage geo files, like shapefiles, in a participatory space.

Extensions to the GeoIP library.

Ruby translators to transform various metadata feeds into solr documents and a command-line utility to access/utilize the gem's translators to harvest metadata into a working solr instance.