Visualizing OpenStreetMap history – part 2
Thanks to the hard work of Vincent we now have a database with the average version and average age of nodes per grid cell. Now we can start to get a feeling of the data. I’ve rendered both datasets for Amsterdam on a 10x10m grid. In general the idea is that red is bad and green is good. The younger a node is, the more likely it reflects the current situation in the real world. Also the higher the version number, the more people have been looking at that node and corrected it.
At least that is the theory Martijn tries to work with.
The age in days for OpenStreetMap nodes
Visualizing OpenStreetMap history
I’m working with Martijn and Vincent on a way to visualize the history of OpenStreetmap data for their analysis of the ‘crowd-quality’ of the data. I used my favorite visualization tool Processing to visualize the history of one node:
