[talk-ph] Node density visualization

Eugene Alvin Villar seav80 at gmail.com
Sat Feb 25 12:38:11 GMT 2012

Correction, that should be 0.01°, not 0.1°. :-)

On 2/25/12, Eugene Alvin Villar <seav80 at 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


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