Map for WPF - How to Implement Custom Map Projection This example describes how to implement custom map projection (the Hammer-Aitoff projection). To create a custom projection, inherit the ProjectionBase class and override the following methods of the base class: GeoPointToMapUnit MapUnitToGeoPoint GeoToKilometersSize KilometersToGeoSize Files to Review HammerAitoffProjection.cs (VB: HammerAitoffProjection.vb) MainWindow.xaml (VB: MainWindow.xaml) Documentation Geographical Projections