Line Cleaner
Overview
Line Cleaner is a tool that can be used to perform 'light-conflation' on line data. It was developed for the BC Ministry of Forests and Range (MOFR) to clean up road data-sets that contained close but not exact feature replication.
Line Cleaner prepares features by simplifying complex, cyclical, short and zero-length geometries, and removing pseudo-nodes and insignificant vertices. During data preparation, node projection and co-location ensure that feature matches can be considered atomically, not as part of a full network.
Each of the processing stages operates on a GeoTools FeatureStore. The stages are:
| Processor |
Description |
| Cycles |
Search for and eliminate cycles in the data, provided they are under a set length. |
| DouglasPeucker |
Perform Douglas Peucker simplification on each line. |
| End Nodes |
Snap the ends of nearby lines together. |
| Minimum Length |
Eliminate lines that have a length that is shorter than the provided parameter. |
| Node Insertion |
Insert nodes at the closest point on all features. Do this before the End Nodes processor to strategically collapse features. |
| Pseudo-Nodes |
Removes "pseudo-nodes" by joining line features that share the same end points. |
| Similar Lines |
Cleans out duplicate and similar features. |
Installation
Line Cleaner is a uDig plug-in, and can be installed using the Update Manager. Please see Finding new Plug-ins.
It is invoked by right clicking a layer and choosing Operations->Line Cleaning
