Object geocoding (by street or IP address), reverse geocoding (coordinates to street address), distance queries for ActiveRecord and Mongoid, result caching, and more. Designed for Rails but works with Sinatra and other Rack frameworks too.

Geokit provides geocoding and distance calculation in an easy-to-use API

Enables easy Google map + overlays creation.

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.

Official Geokit plugin for Rails/ActiveRecord. Provides location-based goodness for your Rails app. Requires the Geokit gem.

ActiveRecord connection adapter for PostGIS. It is based on the stock PostgreSQL adapter, and adds built-in support for the spatial extensions provided by PostGIS. It uses the RGeo library to represent spatial data in Ruby.

GeoRuby provides geometric data types from the OGC 'Simple Features' specification.

This gem provides the leaflet.js map display library for your Rails 4+ application.

Graticule is a geocoding API that provides a common interface to all the popular services, including Google, Yahoo, Geocoder.us, and MetaCarta.

Simple geocoding for Active Record models. See the README for more details.

GeoRuby is intended as a holder for data returned from PostGIS and MySQL Spatial queries. The data model roughly follows the OGC "Simple Features for SQL" specification (see www.opengis.org/docs/99-049.pdf), although without any kind of advanced functionalities (such as geometric operators or reprojections)

GeoRuby provides geometric data types from the OGC 'Simple Features' specification.

GeoRuby provides geometric data types from the OGC 'Simple Features' specification.

A port of the YM4R-GM plugin for rails, to github

Zero-effort creation of Location-aware Rails application based on W3C Geolocaton API.

Mongoid Extension that simplifies MongoDB casting and operations on spatial Ruby objects.

Execute PostGIS functions on Active Record

GDAL/OGR bindings for ruby

A tiny Ruby library to quickly standardize a postal address

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

library dedicated to generate OSM javascript

A wrapper to MaxMind's GeoIP services, that can work with both free and paid versions. Also provides geo-location methods to Active Record and Sequel Models. This product includes GeoLite data created by MaxMind, available from http://www.maxmind.com/.

creates (W)ell(K)nown(T)ext bounding boxes from points