[talk-ph] Node density visualization

[Eugene Alvin Villar]

Hi guys,

Here's a new year update to the node density visualizations.

Here is the absolute node density as of January 1, 2013:
http://wiki.openstreetmap.org/w/images/f/f2/Philippines_node_density_2013-01-01.png

And here's the node density increase comparing January 2, 2012 and January
1, 2013:
http://wiki.openstreetmap.org/w/images/5/5b/Philippines_node_density_increase_from_2012-01-02_to_2013-01-01.png

The increase in the number of nodes last year is pretty much distributed
throughout the archipelago. The most number of increase is in the Quiapo
area and this is due to maning's project there.

Good work everyone! Let's make 2013 even better. :)




On Sun, Jul 15, 2012 at 5:59 PM, Eugene Alvin Villar <seav80 at gmail.com>wrote:

> <<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 <seav80 at 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 <seav80 at 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 <seav80 at gmail.com>
> wrote:
> >>> 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
> >
> >
> >
> > --
> > http://vaes9.codedgraphic.com
>
>
>
> --
> http://vaes9.codedgraphic.com
>
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