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What is topology checker in QGIS?
With the Topology Checker plugin, you can look over your vector files and check the topology with several topology rules. QGIS has a built-in topological editing feature, which is great for creating new features without errors. But existing data errors and user-induced errors are hard to find.
How do I add a topology checker in QGIS?
To install a plugin, click menu Plugins >> Manage and install plugins.. Then plugins window will appear as in figure 3. Type topology in search menu and topology checker plugin will be shown. Check the topology checker plugin and then push Install Plugin button.
How to check topology error in QGIS plugin?
In the previous tutorial, had been discussed how to check topology error in QGIS with Topology Checker plugin. Some topology errors such as dangle (overshoot, undershoot), overlap and gaps are successfully detected using the topology checker plugin with defining rules in the topology rule settings.
How do you identify geometry errors in QGIS?
The first step is to identify where the errors are using Topology. Simply put “topology” is the term used to describe how points, lines and polygons relate to each other. In QGIS these relationships can be identified by assigning a set of rules using the “Topology Checker”.
How to check for gaps in QGIS 3.0.3?
The answer maybe late, but for QGIS 3.4.1, which I expect it was available in QGIS 3.0.3, you can define topological rule to check for gaps using the following steps: Select the layer you want to check its topology -> Under Rule select Must not have gaps -> Click on Add Rule -> Click OK:
What can you do with topology checker plugin?
The Topology Checker Plugin Topology describes the relationships between points, lines and polygons that represent the features of a geographic region. With the Topology Checker plugin, you can look over your vector files and check the topology with several topology rules.