Topologic analysis and correction tool. This detects double node, spikes, colinearity, bowtie, complex bowtie, retracing, overlay, gap detection ...etc on points, lines, rectangles, polylines and regions.
A gathering of the European OpenStreetMap communit, State of the Map Europe, took place in Karlsruhe, Germany in June. Hundreds of attendees met to discuss various aspect of the project. Ed Freyfogle details how OpenStreetMap (OSM) has come a long way.