OpenStreetMap

tyr_asd has commented on the following diary entries

Post When Comment
Surfacing Wikidata objects with coordinates to match them with OSM 25 days ago

Wikipedia editors created a lot of stubs from Geonames which went to generate new Wikidata items having only the label in the sh iso code

oh… that sounds like a lot of fun to clean up after this import.

In fact, I already found quite a lot of duplicate wikidata entry pairs where one stems from a "real" wikipedia article and one from a geonames-imported stub article. (e.g. Q1526768 and Q18473363.) Fortunately, one can quite easily fix them by merging the items with this wikidata tool: https://www.wikidata.org/wiki/Special:MergeItems. (@sabas: I've signed those points on your tool as "non mappabile" because the respective item is now a redirect, is that the correct way to do it?).

Describing Wikidata items with OpenStreetMap tags about 1 month ago

You can also see which OSM tags are already linked from wikidata on the following (daily updated) list on taginfo: https://taginfo.openstreetmap.org/projects/wikidata_org#tags. Strangely, it only reports 872 items.

Micromapping gone wrong about 1 month ago

Here's a similar example: http://www.openstreetmap.org/way/397462262#map=19/39.92535/32.83750&layers=D 🙈

Finding dragged nodes about 1 month ago

Tools like keepright often indirectly show such cases by detecting the non-intersecting overlapping highways.

OSM Node Density – 2016 Update about 1 month ago

@joost: nope. here you go: https://gist.github.com/tyrasd/80b2cbd9a3991e9b295124c1a6165bc2. Code and freshly processed raw data is included. osmnodes-eu.geostatgrid.csv uses keys that are compatible with the grid ids from the pop dataset, but note that their "reference grid" doesn't include cells with 0 population.

OSM Node Density 2014 about 2 months ago

@goclem: In this visualization (as well as the updated one) from 2016, there is no minimum number of nodes in a pixel. The maximum depends very much on the zoom level you're looking at. Frederic's analysis from 2013 may give you some more insight into what absolute numbers one might have to expect.

Validation feedback can provide important social affirmation about 2 months ago

@dekstop: Thanks for the additional explanation! It's much clearer now.

Validation feedback can provide important social affirmation about 2 months ago

reduction of the hazard rate to 80%

Can you please explain (to a non-statistician) what that means exactly? For example: Does it mean mappers who received feedback, were ~20% more likely to continue mapping compared to those who weren't messaged?

Evolving roads 2 months ago

Very nice! Did you use osm-history-renderer to extract the geometries from the history dump, or something else?

[demo] Emojis in overpass turbo!! 😍😈😃 3 months ago

Nice!

Here's the query usefully combined with some mapcss: http://overpass-turbo.eu/s/laC 😎😎😎

History of all Tags 3 months ago

Sorry, currently, there's no updates! :( I've been looking into doing updates via Overpass' augmented diff, but I've run into some issues which need to be resolved upstream before it can work (see links in https://github.com/tyrasd/taghistory/issues/10). The alternative of reprocessing the history dump every week or month is currently also not really an option because of my limited computing resources.

overpass turbo now with MapCSS support 3 months ago

@Robot8A: Unfortunately, that's also one more thing on my to-to list.

History of all Tags 5 months ago

@Joost, probably not too hard. There's already a ticket on github for that, where any progress will be documented: https://github.com/tyrasd/taghistory/issues/6

The number of the month: 74.9 percent 5 months ago

30'000 different IP adresses per each day of the weekend [accessed] Overpass API

yep, that's in line with what I'm seeing in overpass turbo's recent access logs (see the chart below; the pre-event base level is around ~500 visits per day ^_^). The bulk of new users seems to come from the US, though.

100€ for a subscription to diary comments 6 months ago

Nice job everyone!

History of all Tags 6 months ago

@Jojo4u: You're free to do everything you want with the generated charts as long as you comply with ODbL's minimal requirement for produced works, i.e. citing OSM as the data source. A link back to this blog article and/or the website taghistory.raifer.tech is very much appreciated, though. :)

History of all Tags 6 months ago

Funny idea, that could indeed partially improve the issue with split ways. Still, a proper solution would have to track the actual length and/or area of the respective objects.

Visualizing OSM.org's Map Views 7 months ago

Oh, I wasn't aware of trolleway's implementation. Thanks for pointing it out!

Visualizing OSM.org's Map Views 7 months ago

Now, you can click on the map to get the actual values and a preview of the respective tile:

History of all Tags 7 months ago

Math1985 has more interesting examples on his osm diary page: http://www.openstreetmap.org/user/Math1985/diary/39404