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.