[talk-au] Accessing landcover/trees

Andrew Harvey andrew at alantgeo.com.au
Fri Feb 15 03:29:16 UTC 2019

You'll probably run into limits using the Overpass API to extract large
amounts of data.
I'd recommend osmium as it's very fast. Here's an example using it to
filter data by tags
So once you have an extract
http://download.openstreetmap.fr/extracts/ you'd run
osmium tags-filter australia.osm.pbf wr/natural=wood wr/landuse=forest
wr/landcover=trees -o wooded-areas.osm.pbf
"wr" means both ways and relations, which should pick up the one you
found mapped as a relation.
Then you can export to GeoJSON with osmium export
osmium export wooded-areas.osm.pbf -o wooded-areas.geojson

PS. Big fan of your weather tweets on Twitter!

On Fri, 15 Feb 2019, at 1:34 PM, Andrew Miskelly wrote:
> Hi folks,
> I'm trying to get hold of polygons for areas in Australia which are
> "wooded" using Overpass but I don't seem to be able to get
> comprehensive data. Combinations of landcover, landuse, natural etc.
> queries only return a subset of actual wooded areas.> 
> The polygons are rendered at https://www.openstreetmap.org/ but when I
> attempt to query them nothing relevant comes back (see the screen shot
> at https://anero.id/shared/20190215021156_1.jpg).> 
> Does anyone know how to retrieve these generic wooded area polygons?
> Thanks and regards,
> Andrew
> _________________________________________________
> Talk-au mailing list
> Talk-au at openstreetmap.org
> https://lists.openstreetmap.org/listinfo/talk-au

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