Programming language: C#
License: GNU General Public License v3.0 or later
Tags: GIS    
Latest version: v2.9.4.1

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CoordinateSharp is a simple .NET library that is designed to assist with geographic coordinate conversions, formatting and location based celestial calculations such as sunset, sunrise, moonset, moonrise and more.

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This library was built to help other developers. Please make the time and effort worth while by telling us what you are using it for.


.NET 4.0, .NET 5.0, .NET 6.0 or .NET Standard 2.0, 1.4, 1.3 compatible runtimes.


CoordinateSharp is available as a nuget package from nuget.org

Alternatively, you may download the library directly on our website

Licensing & Purchase

CoordinateSharp is split licensed. You may use CoordinateSharp under the AGPL3.0 or a Commercial Use License that absolves you of the AGPL3.0 requirements. Details as well as pricing may be viewed on our website

Usage Example

CoordinateSharp is simple to use. In the below example we create a Coordinate using one of the methods below.

//Seattle coordinates on 5 Jun 2018 @ 10:10 AM (UTC)
//Signed-Decimal Degree    47.6062, -122.3321
//Degrees Minutes Seconds  N 47º 36' 22.32" W 122º 19' 55.56"


//Initialize with signed degree (standard method)
Coordinate c = new Coordinate(47.6062, -122.3321, new DateTime(2018,6,5,10,10,0));


//Initialize with TryParse() Method
Coordinate.TryParse("N 47º 36' 22.32\" W 122º 19' 55.56\"", new DateTime(2018,6,5,10,10,0), out c);


//Initialize with Secondary Method
Coordinate c = new Coordinate();
c.Latitude = new CoordinatePart(47,36, 22.32, CoordinatePosition.N, c);
c.Longitude = new CoordinatePart(122, 19, 55.56, CoordinatePosition.W, c);
c.GeoDate = new DateTime(2018,6,5,10,10,0);

Once the Coordinate is created we have access to various formats and celestial data. Here are just a few examples.

Console.WriteLine(c);                              // N 47º 36' 22.32" W 122º 19' 55.56"
Console.WriteLine(c.Latitude.Seconds);             // 22.32
Console.WriteLine(c.UTM);                          // 10T 550200mE 5272748mN

Console.WriteLine(c.CelestialInfo.SunSet);         // 5-Jun-2018 4:02:00 AM
Console.WriteLine(c.CelestialInfo.MoonAltitude);   // 14.4169966277874

Extension Packages

Extension packages are being built to work in conjunction with CoordinateSharp. Currently available extension packages may be downloaded via Nuget.org. Documentation for extension packages is contained in the main documentation of the library and can be found on our website.

  • CoordinateSharp.Magnetic - Calculate location based magnetic field elements.

Performance Tips

CoordinateSharp's ease of use comes from its eager loaded architexture. This approach may come at the cost of performance at times, but luckily the eager loading of certain properties can be turned off to improve benchmarks. For example if you only need MGRS conversions, you can turn off celestial calculations and improve Coordinate initialization by 6-10ms.

It is highly recommended that developers reference our Performance Tips Page once they have become familiar with the basic usage of CoordinateSharp.


  • Lat/Long formatting: Quickly format how a coordinate is output.
  • Coordinate conversions: Convert Geodetic Latitude / Longitude to UTM, MGRS, Cartesian (Spherical and ECEF), Web Mercator (EPSG:3857) or vice versa.
  • Coordinate parsing: Initialize a Coordinate with multiple format types using TryParse().
  • Coordinate moving/shifting: Shift coordinates using a distance and bearing, or a distance and target coordinate.
  • Location based celestial information: Quickly determine sun set, moon rise, next solar eclipse or even zodiac signs at the input location.
  • Property change notification: All properties automatically adjust as the Coordinate changes. For example, changing the GeoDate will cause all celestial times to recalculate. Adjusting a Coordinate latitudinal seconds, will retrigger all coordinate conversions and celestial data so your information is always up to date.
  • Geo-Fencing: Define a perimeter and determine if your coordinate is within or near polylines.


Check out the CoordinateSharp Developer Guide for more detailed instructions on the usage and abilities of CoordinateSharp.

You may also view the Documentation for a more in depth look at CoordinateSharp's structure.

Change notes can be viewed here.


Have a technical question, but don't feel like creating an issue? Email us at [email protected]

*Note that all licence references and agreements mentioned in the CoordinateSharp README section above are relevant to that project's source code only.