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Topology is a data structure often used in GIS. Topology is the stored relationships between map features. When topology has been created (such as in an ARC/INFO coverage), the file would “know” its position, “know” what is around it, “understand” its environment by virtue of recognizing its surroundings, and “know” how to get from A to B. Topological relationships are stored in a series of relational databases. Each database stores information about a feature.

Example of Topology

A database would store the following information about each individual arc:

  • Number of the arc
  • Beginning node number
  • Ending node number
  • Polygon to its left
  • Polygon to its right

 In this way, each node, line, and polygon could be defined by its neighbors and what it is connected to.

About Mustafa

My name is Mustafa Awais, I am basically from Pakistan & Currently living in Saudia Arabia, I am Civil Engineer as well as Web Master.

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