[Talk-GB] Polygon Coverage of Cornwall

Rosenfeld, Emma E.Rosenfeld at exeter.ac.uk
Wed Jul 3 08:37:56 UTC 2019

Hi Jerry,

Thanks very much for your reply. I will look into your suggestions.

I have been drawing polygons around my areas of interest (residential, industrial, commercial etc) in a GIS and I will look into adding these to OSM in time


From: SK53 <sk53.osm at gmail.com>
Sent: 01 July 2019 16:49
To: Rosenfeld, Emma
Cc: talk-gb at openstreetmap.org
Subject: Re: [Talk-GB] Polygon Coverage of Cornwall

Hi Emma,

A quick look suggests lots of landuse//landcover has not been mapped in Cornwall, which is fairly typical of OpenStreetMap in general.

Given that you are using OpenMapTiles adding additional features to OSM is probably the quickest way to get things which you are interested in available in the tiles. This may not be too arduous if you are able to assume that blank areas default to farmland.

If you use OSM data direct (e.g., from Geofabrik and loaded it into PostGIS with osm2pgsql) or via geojson output from Overpass-Turbo and pull it into a GIS package you could infill the gaps with something like CORINE data. Obviously this is a long way from usable vector tiles, but probably gives you decent complete coverage more quickly. There are some helpful tabulations of how CORINE <https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwiki.openstreetmap.org%2Fwiki%2FCorine_Land_Cover%23Tagging&data=02%7C01%7CE.Rosenfeld%40exeter.ac.uk%7C22d747689b37454178d908d6fe3bc815%7C912a5d77fb984eeeaf321334d8f04a53%7C0%7C0%7C636975930046162048&sdata=kqf5PPlaQugHXWWkj%2FAFxUtnfN8tokxkIat6N0%2Bzboc%3D&reserved=0> and Urban Atlas<https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwiki.openstreetmap.org%2Fwiki%2FUser%3ASK53%2FUrban_Atlas&data=02%7C01%7CE.Rosenfeld%40exeter.ac.uk%7C22d747689b37454178d908d6fe3bc815%7C912a5d77fb984eeeaf321334d8f04a53%7C0%7C0%7C636975930046162048&sdata=%2FyO4EiO0KVFQRPqbnk9T%2FyXaAxLBBJ14jAVY1jAT%2Fq4%3D&reserved=0> data codes correspond to OSM tags on the wiki. I may also have additional residential/urban area polygons calculated from OSM which cover areas where there are no landuse=residential polygons.



On Mon, 1 Jul 2019 at 16:02, Rosenfeld, Emma <E.Rosenfeld at exeter.ac.uk<mailto:E.Rosenfeld at exeter.ac.uk>> wrote:
Hello all

I'm using OpenMapTiles for some mapping work in Cornwall and the information that they are providing is really great. I have downloaded the landuse and land cover layers but there are gaps in coverage. Does this mean that the polygons need creating or are there polygons in existence somewhere that need classifying?

Many thanks


Dr Emma Rosenfeld
Research Technician
Environment & Sustainability Institute
University of Exeter, Penryn Campus, Penryn, Cornwall, TR10 9FE, UK<https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fowa.exeter.ac.uk%2Fowa%2Fredir.aspx%3FC%3DbwYy5azoSU-eQhKkyRMRDqr3AVhZb88IFKNMOvWalNK2leAArrLF4-Oz9XZO3E7sLhLs2dfwmtU.%26URL%3Dhttp%253a%252f%252fwww.exeter.ac.uk%252fesi%252f&data=02%7C01%7CE.Rosenfeld%40exeter.ac.uk%7C22d747689b37454178d908d6fe3bc815%7C912a5d77fb984eeeaf321334d8f04a53%7C0%7C0%7C636975930046172046&sdata=p5zFNTRqnEQ8hdn%2Bga8WCtu2ZWs1uRnwtmyPbkbogFU%3D&reserved=0>

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