07-20, 10:30–10:50 (Poland), Plenary Auditorium
In this talk, Michael will present an analysis of the current mapping of landuse in OpenStreetMap in Europe. The talk will focus on different methods to map landuse (sharing nodes with roads and sharing roads with neighbouring landuse polygons) and the usage of multipolygons. It will present findings about the age of landuse polygons, their fragmentation, coverage and overlapping landuse. The findings will be presented as maps to show the diversity in mapping styles between countries and their regions.
This talk will present the results of my analysis of landuse mapping in OpenStreetMap in Europe:
- Do mappers "clue" landuse polygons to each other (i.e. sharing nodes)?
- Do mappers "clue" landuse polygons to roads (i.e. sharing nodes) or do polygons end in the ditch along the road?
- How many landuse polygons are mapped as multipolygons? How many of them could be remodeled as closed ways without loss of information?
- How old are landuse polygons?
- Can we spot "one-tree forests", i.e. forest polygons modelling the crown of individual trees?
- What landuse classes overlap each other very often? How large is the overlap?
- Can we spot differences between countries mapped by craftmappers and countries where imports dominate?
Results will be presented on regional level (admin_level 6) to highlight regional differences within countries.
The talk will offer a hint if we as community should ban some mapping styles. It will not give any insights on the qualitative accurancy of landuse classification.
Michael has been contributing to OpenStreetMap since 2011, studied Geomatics and works as a software developer at Geofabrik.