Are there any open source tools for conflating (matching) two layers of point (node) data?
I'm particularly interested in using such a tool to sync data with OpenStreetMap, where I've created a wiki page on the subject of conflation. That page links to some university research projects on the conflation of vector datasets using open source software (OpenJUMP and Quantum GIS), however they don't share their work.
Implementation if tool doesn't exist
I know algorithmically this task shouldn't be that difficult especially compared to handling generic vectors, as it would simply use distance and similar properties along with some math, however I suppose I'm more interested in a graphical interface implemented in open source software.
I wrote up a possible workflow for conflating nodes here on the OSM wiki. I thought of trying to implement it in JOSM, however if there are others from the broader GIS community interested in this then it would make sense to implement it in something like QGIS, especially if other developers would get involved.
I think it might be useful to say what I'd be interested in using this tool for.
- Syncing Virginia interstate exit data from VDOT with OSM
- Syncing GNIS feature points with OSM
After an extension to conflate polygons (using their centroids), the tool could also be used for:
- Transferring properties (tags, attributes) between nodes representing a house along with addressing data to a polygon (area, closed way) of the actual building
I'm sure there are many other possibilities, but these are the few I'm planning to use it for.