Spatial Relationships in GIS - Geospatial Topology Basics

Landon Blake


This article provides the reader with an introduction
to geospatial topology. It is a continuation of the article
in the last issue of the OSGeo Journal, which provided
the reader with an introduction to spatial relationships
in 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
â??featureâ?? 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

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