MetaCRS

Coordinate Reference System Transformations

The group of MetaCRS projects provide libraries of methods to transform between different coordinate reference systems. A geographic coordinate reference systems allows all points on the earth to be described as set of coordinates (such as latitude, longitude and elevation). Different systems are used to represent the 3 dimensional earth on a flat, 2 dimensional map.

The MetaCRS libraries are included in other projects and some are also available via a command line interface.

The sub-projects that make up MetaCRS include:

• PROJ.4 (C++) - used in MapServer, GRASS GIS, PostGIS, Mapnik, Thuban, OGDI, TopoCad, OGRCoordinateTransformation and various others.
• Proj4js (JavaScript) - used in OpenLayers.
• CS-Map (C++) - used in MapGuide.
• GeoTIFF/libgeotiff (C++).
• Proj4J (Java).
• SpatialReference.org - website to retrieve coordinate system definitions.

Core Features

• Provides point transformation from one coordinate reference system to another.
• Includes transformation between datums.
• Large number of projection classes supported.

Implemented Standards

The projects typically use coordinate system definitions as defined by the European Petroleum Survey Group (EPSG) and defined in Well Known Text (WKT) format.

PROJ.4

Website: http://trac.osgeo.org/proj/

Licence: X/MIT style Open Source license

Software Version: 4.7.0

Supported Platforms: Windows, Linux, Mac

API Interfaces: C, C++, Python, Java, Ruby

Support: http://lists.maptools.org/mailman/listinfo/proj

Proj4js

Website: http://proj4js.org

Licence: LPGL

Software Version: 1.0.1

Supported Platforms: Windows, Linux, Mac

API Interfaces: JavaScript

Support: http://lists.osgeo.org/mailman/listinfo/MetaCRS

CS-Map

Website: http://proj4js.org

Licence: custom

Software Version: 13.0

Supported Platforms: Windows, Linux, Mac

API Interfaces: C, C++

Support: http://lists.osgeo.org/mailman/listinfo/MetaCRS

GeoTIFF/libgeotiff

Website: http://trac.osgeo.org/geotiff/

Licence: X/MIT style Open Source license

Software Version: 1.3.0

Support: http://lists.maptools.org/mailman/listinfo/geotiff

Proj4J

Website: http://trac.osgeo.org/proj4j/

Licence: Apache License, Version 2.0

Software Version:

Supported Platforms: Windows, Linux, Mac

API Interfaces: Java

Support: http://lists.osgeo.org/mailman/listinfo/proj4j