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I would like to import some forest and farmland polygons from the Corine Land Cover. I have downloaded the Corine Land Cover shapefiles. I have also viewed them in QGIS and extracted the areas I want to work with to a smaller set.

What is an easy way to import these polygons to OSM? Both for a smaller set and also if I import a larger set of polygons? Is it possible to do so that the polygons get the correct tags, so I don't need to use another tool to edit them after upload to OSM?

I have read WikiProject Corine Land Cover/Corine Data Import but that process seem to be complicated since it require a local PostGIS database, many tools and also download of OSM data.

UPDATE I have now tried with what Frederik Ramm suggested, by importing shapefiles in Potlatch. But I can't get it working. See How to use a Shapefile in Potlatch?

I have also tried to open the shapefile with polygons in QGIS, then transform the polygons to linestrings and export the linestrings to a GPX file. But when I import the GPX file to OpenStreetMap, it fails because the GPX files doesn't have a any timestamps.

Is there any other way I can import a few polygons from Corine Land Cover shapefiles to OpenStreetMaps?

asked 07 Oct '11, 10:57

Jonas_'s gravatar image

Jonas_
662152133
accept rate: 0%

edited 20 Oct '11, 18:36


When importing data, it is very important to discuss the issue with other local mappers before you do. Even if the data source is legally suitable, there might be many other reasons against an import.

As the importer, you have the responsibility of doing things right - technically and socially. There might be people who dislike the import, especially if it interferes with data that already exists. There is a reason why the documented process is complex: It is easy to break things, or import them in a way that is technically wrong. For example, if you simply convert shape files to OSM then you will likely create duplicate nodes where two land cover areas meet - when the correct way would be at least re-using the nodes, but in some cases also using multipolygons and re-using the boundary line between the two.

If you find that the documented process is too complicated. then I suggest that you do not import anything at all. It is easy to harm OSM with a badly executed import - the map might have more colours afterwards, but you could upset the community and create data that is hard to edit.

Potlatch has a vector background layer where you can load a shape file and copy selected shapes from it, manually. Maybe that is an alternative for you. Adding data for areas you know personally is more rewarding, and more sustainable, than plastering the whole country with land cover data.

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answered 07 Oct '11, 11:14

Frederik%20Ramm's gravatar image

Frederik Ramm ♦
70.0k806341097
accept rate: 24%

I have now tried to use a shapefile in Potlatch, but I got an error: http://help.openstreetmap.org/questions/8428/how-to-use-a-shapefile-in-potlatch

(13 Oct '11, 09:52) Jonas_
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question asked: 07 Oct '11, 10:57

question was seen: 4,760 times

last updated: 20 Oct '11, 18:36

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