Hi guys, I made a follow-up to the node density visualization I shared back in March. This time, the map shows the node increase compared to the data of the original map. Similar to before, brighter pixels represent areas with higher node count increases. Gray pixels show the original data as a baseline.
You can view it here: http://wiki.openstreetmap.org/w/images/5/56/Philippines_node_density_increase_from_2012-01-02_to_2012-06-03.png For comparison here's the original map: http://wiki.openstreetmap.org/w/images/8/81/Philippines_node_density_2012-01-02.png Take note that this is not a map of editing activity! It only merely shows node density increases. (So if someone deleted a node in an area and another one created a node, there will be no change in the node counts.) But this visualization does somewhat indicate where new data is being added. It's nice to see that most parts of the Philippines have seen an increase in data. You can see the obvious effect of the new Bing imagery that was released back in February as bright rectangular areas. Nice work everyone! Let's keep it up! :-) Eugene On Sat, Feb 25, 2012 at 8:38 PM, Eugene Alvin Villar <sea...@gmail.com> wrote: > Correction, that should be 0.01°, not 0.1°. :-) > > On 2/25/12, Eugene Alvin Villar <sea...@gmail.com> wrote: >> Hi guys, >> >> I created a visualization showing the node density of OSM data in the >> Philippines taken from the 2012-01-02 Geofabrik extract. Each pixel >> represents a 0.1°×0.1° degree square or approximately 1 square >> kilometer. Brighter pixels represent areas with higher node counts. >> >> View it here: >> http://wiki.openstreetmap.org/w/images/8/81/Philippines_node_density_2012-01-02.png >> >> The edges of available satellite imagery at that time is quite visible >> in some areas like Pangasinan, Cebu, Bukidnon, and Davao del Sur. As >> expected, brighter areas are places where there is a large amount of >> editing and with a large population. >> >> By the way, can you guess which place has the densest concentration of >> nodes (the only purely white pixel in the image)? It's in Naga City >> and this is due to the Naga City import. The second densest location >> is in Marikina, and this is thanks to maning's efforts in mapping all >> of the buildings in his adopted city. :-) >> >> Eugene _______________________________________________ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
