OpenStreetMap

OpenStreetMap Node Density Visualized

Posted by tyr_asd on 27 June 2013 in English (English)

I've visualized OpenStreetMap's node density from Frederik's analysis of densely mapped locations:

(click for uncropped image - 8192x8192, ~1MB)

Every pixel stands for a single zoom-level 13 tile. The color represents the total number of nodes in that tile. Tiles with less than 1000 nodes are not displayed. A "low-res" version of this visualization is also available, which is based on zoom-level 10 tiles: (click to enlarge)

Copying: visualizations © cc-by-sa - source data © OpenStreetMap contributors, ODbL

How-To

In case anyone is wondering how these were made: I've used gnuplot to create the maps, after converting the source data with a simple sed-command. Read more about the actual steps and gnuplot-commands.

Slippy Map Version

There is also a slippy map version! Check it out. ;)

Comment from ajmas on 28 June 2013 at 13:20

Good job.

Before reading the text, the first thing that this made me think of is the "Earth Lights" image from NASA: http://visibleearth.nasa.gov/view.php?id=55167 . Comparing the two shows that the number of nodes does not necessarily correlate with the amount of light produced.

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Comment from aseerel4c26 on 1 July 2013 at 12:16

Thank you for those images! They are now featured on our wiki main page this week.

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Comment from tyr_asd on 1 July 2013 at 12:38

awesome! :)

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Comment from sabas88 on 1 July 2013 at 20:56

Awesome! Could you make a tileset (only low zooms..) like the one by MapBox on the geotagged tweets? http://www.mapbox.com/blog/visualizing-3-billion-tweets/

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Comment from aseerel4c26 on 2 July 2013 at 02:27

@tyr_asd: wow :-)

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Comment from max1e on 17 June 2014 at 13:34

hi, can you help me with: "convert to simple, gnuplot-readable text format" but from windows? sed-command works in windows console? if yes, how add way to file file.13 ? thanks

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Comment from tyr_asd on 17 June 2014 at 14:06

max1e, yes, you should be able to install and run sed also on Windows (ask google). This visualization is done only for nodes because the raw data analysis was done (by Frederik Ramm, username: woodpeck) only for nodes. If you want also ways, you'd have to repeat the analysis step, which could be a quite extensive task, I suppose…

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Comment from max1e on 17 June 2014 at 14:26

tyr_asd, can you show me screenshot or attach file (any image hosting, or file hosting) - view of tiles.13.txt inside? (Structure) because i dont understand what done function "s/([0-9]*) z=([0-9]*) x=([0-9]*) y=([0-9]*)/\3 \4 \1/'"

In windows SED - renamed file from tiles13 to files13.txt, but file inside are empty. thanks

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Comment from tyr_asd on 17 June 2014 at 14:33

max1e, sure, I'll send you a personal message!

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