Geo Tutorials & Articles
-
Spatial data in SQL Server 2008
by Jason FollasJason takes you back to those high school geometry lessons and demonstrates how to take advantage of the new geospatial and geometric data types in SQL Server 2008.
-
GPS- Deriving British Ordnance Survey Grid Reference from NMEA data
by Alex EtchellsThe NMEA data exported by GPS units gives latitude and longitude and geometric distance above the WGS84 (GRS80) reference ellipsoid. The Ordnance Survey maps for Great Britain use grid references based on the Airy Spheroid (OSGB36) reference ellipsoid. The following article discusses a C# class to convert GPS derived NMEA data to the British Ordnance Survey Grid.
-
Writing Your Own GPS Applications: Part 2
by Jon PersonIn part two of the series, the author of "GPS.NET" teaches developers how to write GPS applications suitable for the real world by mastering GPS precision concepts. Source code includes a working NMEA interpreter and sample high-precision application in C# and VB.NET.
-
Writing GPS Applications in .NET: Part 1
by Jon PersonAn introduction to writing GPS applications in .NET good enough for use in a commerical environment such as in-car navigation.