<<Oops. Fixed a link>> Hi guys,
Here's a mid-year follow-up to the node density visualization. Here's the density increase from the last time (June 3) to July 1: http://wiki.openstreetmap.org/w/images/5/52/Philippines_node_density_increase_from_2012-06-03_to_2012-07-01.png The new Bing imagery in June has resulted in increased data in Catanduanes, Metro Naga, Antique, Dumaguete, Butuan, and Tagbilaran. The new Orbview-3 imagery on the other hand resulted in increased data in Palawan, Romblon, and Antique. Here's the density increase from the start of the year to July 1: http://wiki.openstreetmap.org/w/images/3/36/Philippines_node_density_increase_from_2012-01-02_to_2012-07-01.png And here's the node density map itself as of July 1: http://wiki.openstreetmap.org/w/images/8/80/Philippines_node_density_2012-07-01.png Compare to the one from the start of the year: http://wiki.openstreetmap.org/w/images/8/81/Philippines_node_density_2012-01-02.png Eugene On Sun, Jul 15, 2012 at 5:56 PM, Eugene Alvin Villar <sea...@gmail.com> wrote: > Hi guys, > > Here's a mid-year follow-up to the node density visualization. > > Here's the density increase from the last time (June 3) to July 1: > http://wiki.openstreetmap.org/w/images/5/52/Philippines_node_density_increase_from_2012-06-03_to_2012-07-01.png > > The new Bing imagery in June has resulted in increased data in > Catanduanes, Metro Naga, Antique, Dumaguete, Butuan, and Tagbilaran. > The new Orbview-3 imagery on the other hand resulted in increased data > in Palawan, Romblon, and Antique. > > > Here's the density increase from the start of the year to July 1: > http://wiki.openstreetmap.org/w/images/5/56/Philippines_node_density_increase_from_2012-01-02_to_2012-07-01.png > > And here's the node density map itself as of July 1: > http://wiki.openstreetmap.org/w/images/8/80/Philippines_node_density_2012-07-01.png > > Compare to the one from the start of the year: > http://wiki.openstreetmap.org/w/images/8/81/Philippines_node_density_2012-01-02.png > > Eugene > > > On Sun, Jun 3, 2012 at 4:43 PM, Eugene Alvin Villar <sea...@gmail.com> wrote: >> 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 > > > > -- > http://vaes9.codedgraphic.com -- http://vaes9.codedgraphic.com _______________________________________________ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
