Proj4Net.Core

This project is a port of Proj4.Net for .NET Standard for use in .NET Core applications. origin: http://proj4net.codeplex.com/ (not available anymore!)

Project Description

Proj4Net.Core is a C#/.Net library to transform point coordinates from one geographic coordinate system to another, including datum transformation. The core of this library is a port of the Proj4J library.

Proj4Net targets

.NET Core
.NET Framework 4.x

Home of Proj4J/Proj4

Proj4J: https://trac.osgeo.org/proj4j/

Description of projections and parameters: https://proj.org/index.html

Online implementation: https://mygeodata.cloud/cs2cs/

Still to do

Check CoordianteReferenceSystem resource files (epsg/esri/nad/world) for actuality (with proj4)

I made some improvements, now all tests run successful

Modification to the original project

Usage of the library

Install nuget package: https://www.nuget.org/packages/Proj4Net.Core/

Install-Package Proj4Net.Core

There is an implementation for a simple console application cs2cs.core in the project solution.

   
   CoordinateReferenceSystemFactory crsFactory = new CoordinateReferenceSystemFactory();
   CoordinateTransformFactory ctFactory = new CoordinateTransformFactory();

   var sourceCRS = crsFactory.CreateFromParameters("Anon", "+proj=longlat +datum=WGS84 +no_defs");
   var targetCRS = crsFactory.CreateFromName("EPSG:31256");

   var transform = ctFactory.CreateTransform(sourceCRS, targetCRS);

   var sourceCoord = new ProjCoordinate(15, 47);
   var targetCoord = new ProjCoordinate();

   transform.Transform(sourceCoord, targetCoord);

   Console.WriteLine(targetCoord);  // => ProjCoordinate[-101323.59 207623.96 NaN]

Other libraries

Proj4Net is neither the only open source projection library for .Net available nor the one with the most active community. You may want to take a look at

DotSpatial.Projections
Proj.Net
C# Wrapper for native proj4