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
State of the Map
My friend and colleague New Folder is organizing the State of the Map conference this year. He asked me to design a banner for the official site. The conference is, apart from the usual OSM gathering, also focusing on businesses/governments and how they can use OSM data in their line of work. So I decided to create a banner which reflects the transistion OSM has been through. It started with a single idea and a few people collecting GPS tracks. Slowly from these tracks roads could be destinguished. Different types of roads where classified and more and more data was included and suddenly you got a map which at some points was more detailed than a ‘commercial’ map.
First draft SoftM'09 banner