I am also talking about some of the analysis results on my OpenStreetMap Diary page.More information
I am currently a computer science PhD student at the University of Colorado Boulder and a Research Fellow with Mapbox. My interests are in developing tools and methods to explore and better understand the production of Volunteered Geographic Information (VGI). As the largest VGI project, OpenStreetMap presents a great research platform. Here are a few FAQ style facts, if you'd like to learn more, please be in touch!
It is important to note that these historical tilesetse are snapshots of what the current map looked like at the end of each year.
As a result, the numbers reported here could be an under-representation of edits.
For example, if a contributor makes an edit to a map feature early in the year and another contributor updates that feature later in the year, only the second contributor's edit on that feature is going to be present in the tileset.