Spatial Relationships In GIS - An Introduction

Landon Blake


This article provides the reader with an introduction
to spatial relationships in Geographic Information
Systems (GIS). It presents a simple definition of spatial
relationships and explains why spatial relationships
are important in a GIS. This article is intended
for a reader with a basic knowledge of GIS, and does
not cover advanced concepts. To get the most benefit
out of this article the reader should [1] understand
what a "feature" is in the context of a GIS, [2] understand
how features are commonly represented by
vector geometry types like points, lines, and polygons,
and [3] have a basic knowledge of geometry
and coordinate systems.

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