MetaCRS

Coordinate Reference System Transformations

The group of MetaCRS projects provide libraries of methods to transform between difference 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.

Kernfunktionen

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

Implementierte 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

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

Lizenz: X/MIT style Open Source license

Software Version: 4.7.0

Unterstützte Plattformen: Windows, Linux, Mac

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

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

Proj4js

Webseite: http://proj4js.org

Lizenz: LPGL

Software Version: 1.0.1

Unterstützte Plattformen: Windows, Linux, Mac

API Schnittstellen: JavaScript

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

CS-Map

Webseite: http://proj4js.org

Lizenz: custom

Software Version: 13.0

Unterstützte Plattformen: Windows, Linux, Mac

API Schnittstellen: C, C++

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

GeoTIFF/libgeotiff

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

Lizenz: X/MIT style Open Source license

Software Version: 1.3.0

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

Proj4J

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

Lizenz: Apache License, Version 2.0

Software Version:

Unterstützte Plattformen: Windows, Linux, Mac

API Schnittstellen: Java

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