https://github.com/NetTopologySuite/ProjNet4GeoAPI

.NET Spatial Reference and Projection Engine
https://github.com/NetTopologySuite/ProjNet4GeoAPI

c-sharp geoapi geospatial gis projections

Last synced: about 1 month ago
JSON representation

.NET Spatial Reference and Projection Engine

• Host: GitHub
• URL: https://github.com/NetTopologySuite/ProjNet4GeoAPI
• Owner: NetTopologySuite
• License: lgpl-2.1
• Created: 2014-08-25T12:55:07.000Z (almost 12 years ago)
• Default Branch: develop
• Last Pushed: 2025-08-18T09:49:25.000Z (10 months ago)
• Last Synced: 2026-01-25T10:27:52.255Z (5 months ago)
• Topics: c-sharp, geoapi, geospatial, gis, projections
• Language: C#
• Homepage:
• Size: 8.44 MB
• Stars: 300
• Watchers: 33
• Forks: 85
• Open Issues: 52
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-civil-engineering - ProjNet - Coordinate system and map projection transformations. (Programming Libraries / C#)

README

          
# ProjNet (for GeoAPI)

This library is an extended port of [ProjNet](http://projnet.codeplex.com)

## Important notice

The current team unfortunatly doesn't have the resources to dedicate to supporting this project at this moment.

If you see yourself in the position to help out please [reach out](https://github.com/NetTopologySuite/ProjNet4GeoAPI/issues/99).

Alternatives:

* [SharpProj](https://www.nuget.org/packages/SharpProj.NetTopologySuite/)

* [DotSpatial.Projections](https://www.nuget.org/packages/DotSpatial.Projections/)

* [DotSpatial.Projections (NetStandard)](https://www.nuget.org/packages/DotSpatial.Projections.NetStandard/)

* [GDAL/OGR](https://www.nuget.org/packages/GDAL/)

## .NET Spatial Reference and Projection Engine

Proj.NET performs point-to-point coordinate conversions between geodetic coordinate systems for use in fx. Geographic Information Systems (GIS) or GPS applications. The spatial reference model used adheres to the Simple Features specification.

* Read the [Frequently Asked Questions](https://github.com/NetTopologySuite/ProjNet4GeoAPI/wiki/Frequently-Asked-Questions) for common questions.

* Popular [Well-Known Text](https://github.com/NetTopologySuite/ProjNet4GeoAPI/wiki/Popular-Well-Known-Text-representations-of-Spatial-Reference-Systems) representations for Spatial Reference Systems

### Build status

| Branch | Status |

| --- | --- |

| develop | [![Build Status](https://travis-ci.org/NetTopologySuite/ProjNet4GeoAPI.svg?branch=develop)](https://travis-ci.org/NetTopologySuite/ProjNet4GeoAPI) |

| master | [![Build Status](https://travis-ci.org/NetTopologySuite/ProjNet4GeoAPI.svg?branch=master)](https://travis-ci.org/NetTopologySuite/ProjNet4GeoAPI) |

### Get it from NuGet

* For version 1.*

  `PM> Install-Package ProjNet4GeoAPI`  

  - More information on [NuGet](https://www.nuget.org/packages/ProjNet4GeoAPI)  

* For version 2.*  

  `PM> Install-Package ProjNet`

### Talk...

Join the [![Gitter](https://img.shields.io/gitter/room/TechnologyAdvice/Stardust.svg)](https://gitter.im/NetTopologySuite/ProjNet4GeoAPI) on ProjNet (for GeoAPI).

### Projects using ProjNet(4GeoAPI)

* [SharpMap](https://github.com/SharpMap/SharpMap)

(If your project is missing, there is an edit button up-right)

### Supports:

* Datum transformations

* Geographic, Geocentric, and Projected coordinate systems

* Compatible with Microsoft .NetStandard 2.0

* Converts coordinate systems to/from Well-Known Text (WKT) and to XML

### Projection types currently supported:

* Albers

* Cassini Soldner

* Hotine Oblique Mercator

* Krovak

* Lambert Azimuthal Equal Area

* Lambert Conformal

* Lambert Tangential Conformal Conic

* Mercator

* Mercator Auxiliary Sphere

* Oblique Mercator

* Oblique Stereographic

* Orthographic

* Polar Stereographic

* Polyconic

* Pseudo Mercator

* Transverse Mercator