Cleaning Data

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Before importing data, it is a good idea to clean them from the most obvious issues.

We have created two applications, which does this for MapInfo and ArcGIS. It performs these steps:

1.	Test for ungeocoded records and delete them

2.	Delete objects which are not LINE or PLINE (mapinfo script only)

3.	Disaggregate multi-part objects

4.	Remove duplicate and consecutive nodes

5.	Delete polylines with 0 or 1 node

6.	Split loops / circular links in two

You can adapt the scripts if you want to - full source code is included.

Find the mapbasic and arcpy script in the installation folder.