Map for WPF - Use the Ray Casting Algorithm to Check if a Point is Inside a Polygon

This example shows how to use the ray casting algorithm to determine whether a point is inside a polygon.

Refer to the following pages for more information about the ray casting algorithm:

• How can I determine whether a 2D Point is within a Polygon?
• C# Point in polygon

In this example, the ShapefileDataAdapter is used to load vector polygon shapes. After a user double-clicks a shape, its name is shown in the window caption.

Files to Look At

• MainWindow.xaml (VB: MainWindow.xaml)
• MainWindow.xaml.cs (VB: MainWindow.xaml.vb)

Documentation

• Vector Items

More Examples

• How to show tooltips for map shapes
• How to colorize map contours loaded from Shapefiles using the Choropleth colorizer
• How to colorize map contours loaded from Shapefiles using the Graph colorizer
• How to customize the appearance of a map shape element

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