I'm thinking of writing simple application for Windows Mobile devices, where user could simply enter destination coordinates, and the app would calculate distance and show direction to the destination.
But I haven't found any Free, preferably Open Source library with simple API to work with GPS.
I recently used open source SharpGPS. It's supposed to support more devices than the example in the SDK, but both solutions work on all my hardware.
SharpGPS did make it easier to access more structured information, such as satellites in view and where they are, and has a brilliant example app. But most of this will go unused in apps that need GPS info.
There are a set of GPS classes in the OpenNETCF serial library.
There's a sample GPS app in the Windows Mobile 5.0 SDK, but you'll need a fix for it.
GPS.NET is now available free on CodePlex.
I would not say this one as an Open Source tool but ”GPS data as a Software” is the best service I have come through to analyze my GPS data.
If you are a web or mobile application developer, this very helpful and time-saving tool.
Please, find this article for more Information.
来源：https://stackoverflow.com/questions/715031/gps-library-for-net-compact-framework