This zipfile contains a pair of add-ins that allow the user to find the area and perimeter of selected polygons. One add-in, Click Measure.rsc, allows the user to click on a polygon to see its area and perimeter. The other, Selection Measure.rsc, allows the user to get the total area, perimeter, and the total length of shared boundaries for the polygons in a selection set.
Free and open source (GPLv3 license).
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.