Maps Update: 17th of AprilPosted by Zverik on 24 April 2018 in English (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
Brazil_South Region_Westyou 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 , 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 https://www.openstreetmap.org/changeset/57011880 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)