Geospatial data library for Ruby

README.md

RGeo

Gem Version Build Status

RGeo is a geospatial data library for Ruby.

Summary

RGeo is a key component for writing location-aware applications in the Ruby programming language. At its core is an implementation of the industry standard OGC Simple Features Specification, which provides data representations of geometric objects such as points, lines, and polygons, along with a set of geometric analysis operations. This makes it ideal for modeling geolocation data. It also supports a suite of optional add-on modules that provide various geolocation-related services.

Use the core rgeo gem to:

  • Represent spatial and geolocation data objects such as points, lines, and polygons in your Ruby application.
  • Perform standard spatial analysis operations such as finding intersections, creating buffers, and computing lengths and areas.
  • Correctly handle spherical geometry, and compute geographic projections for map display and data analysis.
  • Read and write location data in the WKT and WKB representations used by spatial databases.

Dependencies

RGeo works with the following Ruby implementations:

  • MRI Ruby 2.3.0 or later.
  • Partial support for JRuby 9.0 or later. The FFI implementation of GEOS is available (ffi-geos gem required) but CAPI is not.
  • See earlier versions for support for older ruby versions.

Some features also require the following:

  • GEOS 3.2 or later is highly recommended. (3.3.3 or later preferred.) Some functions will not be available without it. This C/C++ library may be available via your operating system's package manager (sudo aptitude install libgeos-dev for debian based Linux distributions, yum install geos geos-devel for redhat based Linux distributions), or you can download it from http://trac.osgeo.org/geos
  • On some platforms, you should install the ffi-geos gem (version 1.2.0 or later recommended.) JRuby requires this gem to link properly with Geos, and Windows builds probably do as well.

Installation

Install the RGeo gem:

gem install rgeo

or include it in your Gemfile:

gem "rgeo"

If you are using proj.4 extensions, include
rgeo-proj4:

gem "rgeo-proj4"

Extensions

The RGeo organization provides several gems that extend RGeo:

rgeo-proj4

Proj4 extensions

rgeo-geojson

Read and write GeoJSON

rgeo-shapefile

Read ESRI shapefiles

activerecord-postgis-adapter

ActiveRecord connection adapter for PostGIS, based on postgresql (pg gem)

activerecord-mysql2spatial-adapter

ActiveRecord connection adapter for MySQL Spatial Extensions, based on mysql2

activerecord-spatialite-adapter

ActiveRecord connection adapter for SpatiaLite, based on sqlite3 (*not maintained)

Development and support

RDoc Documentation is available at https://www.rubydoc.info/gems/rgeo

Contributions are welcome. Please read the Contributing guidelines.

Support may be available on the rgeo-users google group or on Stack Overflow.

Acknowledgments

RGeo was created by Daniel Azuma. Tee Parham is the current maintainer.

Thanks to Pirq and Neighborland for development support.

Continuous integration service provided by Travis-CI.

RGeo calls the GEOS library to handle most Cartesian geometric calculations, and the Proj4 library to handle projections and coordinate transformations. These libraries are maintained by the Open Source Geospatial Foundation; more information is available on OSGeo's web site.

JRuby support is made possible by the ffi-geos (and upcoming ffi-proj4) gems, by J Smith.

License

Copyright (c) Daniel Azuma, Tee Parham

License