OpenStreetMap

tyr_asd has commented on the following diary entries

Post When Comment
Visualizing OSM.org's Map Views 6 days ago

PS: For those interested in the technical implementation details: Recently I've switched out Vladimir Agafonkin's rbush library with his kdbush implementation, which offers even faster indexing, resulting shaving off another few seconds of startup times. Awesome stuff!

OSM Node Density – 2016 Update 11 days ago

Jennings, I think I just run the commands as explained here (I'm not sure why it reads zoom=16 here – this should also be 15 or lower). That generates a 1 gigapixel (32768x32768) density map, which cut into tiles corresponds to max zoom level 7 on the slippy map: http://tyrasd.github.io/osm-node-density/#7/-7.961/-248.373/latest,places

I tried to use my tms tile source https://s3-eu-west-1.amazonaws.com/osm-node-density/2016/{z}/{x}/{y}.png with mapboxgl as well, and see similarly blurry results. Not sure what's going on. Maybe it's related to https://github.com/mapbox/mapbox-gl-js/issues/4552?

Preparing accurate history and caching changesets 11 days ago

Hey. Great work and thanks for providing this as a service!

PS: are the cached (raw) augmented diffs also publicly available?

Lets have changeset mentions 19 days ago

Biggest problem is probably finding unambigous syntax for all the sorts of mentions (node/way/relation/changeset/user) that people want.

What about just using URIs as identifiers? Github shortens typed URLs to other tickets: http://github.com/project/issues/123 becomes #123. That should work for us as well (e.g. http://www.openstreetmap.org/<type>/<id> becomes type/id or something similar). For user mentions the @username pattern is already a well established.

Surfacing Wikidata objects with coordinates to match them with OSM about 2 months 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 2 months 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 2 months ago

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

Finding dragged nodes 2 months ago

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

OSM Node Density – 2016 Update 2 months 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 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 2 months ago

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

Validation feedback can provide important social affirmation 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 3 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 4 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 4 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 6 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 7 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. :)