[OSM-dev] Generalisation
Martin Koppenhoefer
dieterdreist at gmail.com
Mon Apr 16 08:34:49 UTC 2018
AFAIK, in the osm-carto style there is no generalization on live data for
performance reasons (because of continuous data updates via minutely
diffs). There are some precomputed / extracted data files though, some of
which contain generalized (simplified) data. These are all "external"
sources:
1. world_bnd_m.shp, places.shp, world_boundaries_m.shp
<https://planet.openstreetmap.org/historical-shapefiles/world_boundaries-spherical.tgz>
2. simplified_land_polygons.shp
<http://data.openstreetmapdata.com/simplified-land-polygons-complete-3857.zip>
(updated daily)
3. ne_110m_admin_0_boundary_lines_land.shp
<http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/110m/cultural/ne_110m_admin_0_boundary_lines_land.zip>
4. land_polygons.shp
<http://data.openstreetmapdata.com/land-polygons-split-3857.zip>
(updated daily)
5. icesheet_polygons.shp
<http://data.openstreetmapdata.com/antarctica-icesheet-polygons-3857.zip>
6. icesheet_outlines.shp
<http://data.openstreetmapdata.com/antarctica-icesheet-outlines-3857.zip>
still AFAIK, 1 and 3 are currently still from natural earth data, the rest
is from OSM, 2 is a simplfied version of 4, both come from
openstreetmapdata.org (Christoph and Jochen). Of these, 1-3 are containing
generalized data.
Cheers,
Martin
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