Testing Spatial Relationships

Abstract

When analyzing spatial information, we frequently want to understand the relationship between two or more features on the earth-for example, how far is it from a to b? Does the route between x and y pass through z? Does p share a common border with q? In this chapter, I’ll introduce the methods that you can use to answer these questions, by comparing different aspects of the relationship between two items of spatial data. The general syntax of all of these methods is that the instance to which a comparison is being made is provided as a parameter to a method acting upon the first instance; for example: Instance1.Method(Instance2)