Comparing performance of GDAL and Proj.NET

There are two major free/open source projection libraries available for use under .NET: GDAL and Proj.NET. GDAL has a long history, and is written in C++, so it’s compiled to machine code. The C# bindings are generated by a tool. Calling C++ from C# uses a process called “pinvoke” (Platform Invoke), and a certain amount […]

Installing an MVC Application in a subdirectory of WordPress

For several reasons I have WordPress installed in the root directory of my hosted web space. I’ve been experimenting with the new ASP.NET MVC framework, Entity Framework 4, SQL Server Compact Edition 4 and other new technologies, and I wanted to do a test deployment. I was quite surprised when, after deploying to a subdirectory […]


Introduction A QuadTree is a spatial partitioning strategy used to make queries on relationships between 2D spatial data such as coordinates in a Geographic Information System (GIS), or the location of objects in a video game. For instance, you may need to know all the objects within a region on a map, test whether objects are visible by […]