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Maps Update: 17th of April

Posted by Zverik on 24 April 2018 in English.

Once or twice a month I build data for MAPS.ME application. After the process of downloading OSM data, building coastlines, extracting objects, generating indexes and packaging mwms is done, the final stage is testing. With that, I get notified when a file size changed dramatically, or many objects of a same type were added or removed in a region. I think you might be interested in some of these changes.

So, what happened between 16th March and 17th April?

  • Indonesia_Central: file size increased from 67 to 107 MB
  • Portugal_South: decreased from 56 down to 53 MB
  • Tanzania: 183 up to 212 MB (and it was just 87 MB a year ago!)

And in objects of specific types:

  • In Argentina somebody changed many road classes, mostly up (res→tertiary, primary→trunk).
  • And number of place=town objects fell threefold.
  • In Australia, somebody added surface=aspalt tag on a hundred thousand ways.
  • Austria_Salzburg: 17 thousand more address points (24k → 41k).
  • Bangladesh: office=ngo went from 76 to 121 objects.
  • Bolivia_South: 123% increase in buildings (39k → 87k).
  • Brazil around Minas Gerais: +30k power=tower and +300 substations.
  • Brazil_South Region_West and Cape Verde: lost all highway=trunks (~50 ways each).
  • Burundi: waterways increased by 100%, e.g. streams 6k → 12k objects.
  • Canada_Ontario_Kingston: no more railway=tram.
  • Czech_Stredni Cechy_East: post boxes: 450 → 1332.
  • Germany_North Rhine-Westphalia_Regierungsbezirk Detmold: 64% of railway=light_rail converted to railway=tram.
  • India_Andhra Pradesh: imported 8000 place=village/hamlet.
  • India_Assam: mapped 6600 buildings (+108%).
  • Indonesia_Central: mapped A LOT of roads (~40k tracks and unclassifieds) and 1.6 mln buildings (+180%).
  • Italy_Marche: imported 3200 address points (+120%).
  • Kenya: mapped 6k power=tower (+130%).
  • Libya: mapped 9500 intermittent streams (up from 113).
  • New Zealand North: imported 305k address points (+172%).
  • Norway: imported many thousands of amenity=recycling all over the country, ~500% increase.
  • Peru_Lima: shop=electronics count increased from 341 to 1447.
  • Peru_South: mapped 43k buildings (+52%).
  • Portugal_South: lost around half of natural=wood, =scrub, =grassland, landuse=farmland (36k to 20k), building:part (2500 to 800), railway=station (291 to 176).
  • Russia_Saint Petersburg: leisure=stadium count went down from 172 to just 36. Yes, it’s one of FC 2018 cities.
  • Rwanda and Sudan_West: lost all of highway=living_street.
  • South Africa_Western Cape: added ~7k obscure amenity=* values.
  • In Spain somebody retagged most amenity=doctors as amenity=clinic.
  • Tanzania: building:part count went up from 1081 to 2655.
  • In some regions of the United States, hundreds thousand highway=service ways appeared.


Comment from PierZen on 24 April 2018 at 21:47

Zverik, this is an interesting way to monitor big changes, if there was a way to inform the various communities to look at the modifications.

Comment from naoliv on 25 April 2018 at 01:41

By Brazil_South Region_West you mean which region/area exactly, please?

Comment from user3646 on 25 April 2018 at 06:35

Thank you for these information, and also for your more detailed view of the object changes.

By the way, a little bit OT. I assume one of the main use case of MAPS.ME is routing and navigation. I found interesting behavior if there are barrier=bollard on highway=*. So I also found ongoing open issue at github [1], could you check this, what is the status of finding a solution?


Comment from Warin61 on 25 April 2018 at 07:09

Hi, There is a render that publishes an ‘error’ file for each country/region… I have used that from time to time to see how things are. I have used it from time to time to do any corrections I can.

But a world view of significant changes is nice.

Comment from Nakaner on 25 April 2018 at 18:33

The shrinkage of Portugal was caused by my revert of a large undiscussed import. See the dicusssion of and the thread on the Talk-pt mailing list linked from there.

Comment from PlaneMad on 4 May 2018 at 13:35

Its crazy to know what happens in just a day on OSM. More frequent bulletins please?

Comment from trial on 5 May 2018 at 19:51

@PlaneMad between16th March and 17th April it’s a month and a day, not just one day. Nevertheless amazing.

Comment from Severak on 15 May 2018 at 08:24

There is manual import of post boxes ongoing in Czech republic. We have dataset from the post itself.

(manual import = we have source dataset from Czech Post, but each post box is manually verified and compared to existing data)

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