Corine Land Cover 2006 Poland

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This page can be used for documenting and coordinating the potential Corine Land Cover 2006 + GMES Urban Atlas import process in Poland. The import is in the planning phase, no data has been imported to this point. The France CLC2006 model has set a very good example and this import aims to be executed just as well.

It is hoped that the forest polygons from these two free sources will replace forest and other polygons imported earlier in Poland from UMP which appear to come from a very precise but unknown source and have spurred licensing concerns. They also have no deciduous/coniferous distinction. The idea is for the UMP polygons to be automatically removed where they overlap with a new imported polygon, provided that they have no other tags than "landuse=forest" / "natural=wood" and "source=UMP...". Some of those forests have had names or other attributes added which need to be preserved.

Imported polygons need to be checked for overlapping with pre-existing polygons with at least the following tags:

Conflicting polygons (with at least 3% of surface area overlap?) will be left out for manual uploading and checking.

An import status webpage would be useful for both the automatic and the manual stages, wiki page can be used.

CLC and UA processing

Corine Land Cover and GMES Urban Atlas are both datasets of polygons describing the landuse/landcover of every point of the covered area. Corine Land Cover covers all of European Union countries and GMES Urban Atlas only the biggest cities. It aims to contain data for all EU cities over 100000 inhabitants, but currently (2010) has data for only 190 of the about 250 such cities. About 20 cities in Poland are already available and about 5 more are still planned to be added.

So in places where data in both sources is available (in the cities) the more precise of the sources needs to be chosen. Based on inspection of the data, and on the metadata attached to CLC and UA it is quite clear that UA, where available, is more accurate spatially, although the classification is different. The charts below contain the tags that can be used for each class in the source datasets.

Currently the idea is to mix the two datasets in a postgis table with UA polygons used where they are available and the Corine Land Cover everywhere else. The Corine Land Cover polygons have been skipped where they lie entirely inside a Urban Atlas-covered area, and have been clipped where they only partially overlap with UA data. This table can then be used as a single dataset for further tasks. The postgres queries and python programs used to produce the table will be added here later for reference. Polygons of the same class from CLC and UA on the borders probably can be merged.

The WikiProject_Poland/Urban_Atlas page in Polish contains information about a WMS server set up earlier to allow tracing from Urban Atlas in OSM editors.

An initial version of a visualisation showing the joined datasets (still contains some overlaps due to PostGIS errors, being worked on) can be accesed from JOSM using the url [1] with wmsplugin, it can also be loaded in any other WMS client like QGIS. CLC2006 polygons have a thin black outline and black labels (if zoomed in enough) while the Urban Atlas polygons have white labels and no outlines.

Corine Land Cover classes

1-Artificial surfaces

CLC code CLC description OSM tags Notes
1.1 Urban fabric
1.1.1 Continuous urban fabric landuse=residential
1.1.2 Discontinuous urban fabric landuse=residential
1.2 Industrial, commercial and transport units
1.2.1 Industrial or commercial units landuse=industrial;retail + note=*
1.2.2 Road and rail networks and associated land value "road" is not in use and the road polygons may be of little value, but railway seems useful
1.2.3 Port areas landuse=harbour can be replaced by leisure=marina after survey
1.2.4 Airports aeroway=aerodrome
1.3 Mine, dump and construction sites
1.3.1 Mineral extraction sites landuse=quarry
1.3.2 Dump sites landuse=landfill
1.3.3 Construction sites landuse=construction
1.4 Artificial, non-agricultural vegetated areas
1.4.1 Green urban areas leisure=common Skipped in France, imported as "park" in Romania
1.4.2 Sport and leisure facilities leisure=sport Skipped in France

2-Agricultural areas

CLC code CLC description OSM tags Notes
2.1 Arable land landuse=*
2.1.1 Non-irrigated arable land landuse=farm
2.1.2 Permanently irrigated land landuse=farm
2.1.3 Rice fields landuse=farm + crop=rice
2.2 Permanent crops
2.2.1 Vineyards landuse=vineyard
2.2.2 Fruit trees and berry plantations landuse=orchard
2.2.3 Olive groves landuse=orchard + trees=olive_tree
2.3 Pastures
2.3.1 Pastures landuse=meadow
2.4 Heterogeneous agricultural areas
2.4.1 Annual crops associated with permanent crops landuse=farm Skipped in France
2.4.2 Complex cultivation patterns landuse=farm Skipped in France
2.4.3 Land principally occupied by agriculture, with significant areas of natural vegetation landuse=farm;scrub Skipped in France
2.4.4 Agro-forestry areas landuse=farm;forest Skipped in France

3-Forest and seminatural areas

CLC code CLC description OSM tags Notes
3.1 Forests
3.1.1 Broad-leaved forest landuse=forest + wood=deciduous
3.1.2 Coniferous forest landuse=forest + wood=coniferous
3.1.3 Mixed forest landuse=forest + wood=mixed
3.2 Scrub and/or herbaceous vegetation associations
3.2.1 Natural grasslands natural=grassland
3.2.2 Moors and heathland natural=heath
3.2.3 Sclerophyllous vegetation natural=scrub
3.2.4 Transitional woodland-shrub natural=wood + wood=mixed
3.3 Open spaces with little or no vegetation
3.3.1 Beaches, dunes, sands natural=beach
3.3.2 Bare rocks natural=rock
3.3.3 Sparsely vegetated areas natural=scrub
3.3.4 Burnt areas natural=rock Skipped in France, "rock" used in Romania
3.3.5 Glaciers and perpetual snow natural=glacier


CLC code CLC description OSM tags Notes
4.1 Inland wetlands
4.1.1 Inland marshes natural=wetland + wetland=marsh
4.1.2 Peat bogs natural=wetland + wetland=bog
4.2 Maritime wetlands
4.2.1 Salt marshes natural=wetland + wetland=saltmarsh
4.2.2 Salines landuse=salt_pond
4.2.3 Intertidal flats water=tidal

(See Proposed_features/Water_cover)

5-Water bodies

CLC code CLC description OSM tags Notes
5.1 Inland waters
5.1.1 Water courses waterway=riverbank
5.1.2 Water bodies natural=water
5.2 Marine waters
5.2.1 Coastal lagoons natural=water
5.2.2 Estuaries natural=coastline Skipped in France
5.2.3 Sea and ocean natural=coastline Skipped in France

Urban Atlas classes

The Urban Atlas metadata says Thematic classes based on CORINE LC nomenclature and GUS Legend., but some of the individual UA classes include a whole range of CLC classes or OpenStreetMap tags so it's difficult to find a single way of tagging corresponding polygons. For some classes the opposite is true.

UA code UA description OSM tags Polygons # Notes
1 Artificial surfaces
1.1 Urban fabric
1.1.1 Continuous urban fabric (S.L. > 80%) landuse=residential 70528
1.1.2 Discontinuous urban fabric (S.L. 10% - 80%) Discontinuous Dense Urban Fabric (S.L. 50% - 80%) landuse=residential 116209 Discontinuous Medium Urban Fabric (S.L. 30% - 50%) landuse=residential 26398 Discontinuous Low Urban Fabric (S.L. 10% - 30%) landuse=residential 2670 Discontinuous Very Low Urban Fabric (S.L. < 10%) landuse=residential 223
1.1.3 Isolated structures skip? 93919
1.2 Industrial, commercial, public, military, private and transport units
1.2.1 Industrial, commercial, public, military and private units landuse=industrial;retail;commercial;military + note=* 52800
1.2.2 Road and rail networks and associated land The polygon counts are low because the polygons can be pretty big and cover big parts of a city each one, with holes in them for the residential and other areas. It seems they even had to be split by GMES because they were difficult to process. Fast transit roads and associated land 132 Other roads and associated land 1068 Railways and associated land landuse=railway 1795
1.2.3 Port areas landuse=harbour 44 can be replaced by leisure=marina after survey
1.2.4 Airports aeroway=aerodrome 63
1.3 Mine, dump and construction sites
1.3.1 Mineral extraction and dump sites landuse=quarry;landfill + note=* 2456 Combines CLC 1.3.1 and 1.3.2
1.3.3 Construction sites landuse=construction 6018
1.3.4 Land without current use landuse=greenfield 4710
1.4 Artificial, non-agricultural vegetated areas
1.4.1 Green urban areas 9104 Skipped in France, imported as "park" in Romania
1.4.2 Sport and leisure facilities leisure=sport 6079 Skipped in France
Non-artificial surfaces
2 Agricultural areas, semi-natural areas and wetlands landuse=farm + note=*? 79817 Unfortunately this combines wetlands (CLC class 4) and other stuff, may need to be combined with CLC polygons?
3 Forests landuse=forest? 54153 Should this be combined with CLC data for the type of foliage?
5 Water 6069