COD Tutorial: How to correct topological errors

Step by step guide 

This tutorial was developed using common errors with  COD-AB. The techniques to used to inspect and correct data can be applied to other datasets with their own elements in mind.  

The following topics are discussed:

  • Inspecting data for topological errors
  • Creating an error report
  • Fixing topology errors (gaps, overlaps) 
  • Creating higher admin levels from the lowest level available