Finnish Corine Land Cover 2018-project produce a satellite image mosaic, both raster and vector land cover databases and land cover changes databases. Databases will represent the land cover of the year 2018, and the changes databases comparing 2018 land cover with 2012 land cover. Corine Land Cover is part of Copernicus Land program.
Background and objectives
European wide CORINE projects have been executed three times before, in the beginning of the 1990's and in 2000, 2006 and 2012. Finland did not participate in the first project, but it has been involved since 2000. In most of the European countries updating has been done by visual interpretation of the satellite images.
In Finland the primary objective of the project is to create an up-to-date raster land cover database and produce raster land cover changes database covering years from 2012 to 2018. Vector databases that meet EEA requirements will be produced in both land cover and land cover changes. Finnish CLC2018 land cover data will be produced by integrating automatically interpreted satellite images and spatial datasets. The changes between 2012 and 2018 will be created by comparing CLC2012 and CLC2018 land cover datasets.
Pan-European high resolution layers of artificial surfaces, forest areas, grasslands, wetlands and small water bodies will be produced as a part of the project. The layers cover the whole Europe and are produced by service providers for EEA. Verification and enhancement of these layers in Finland will be carried out as collaboration between SYKE and Natural Resources Institute Finland.
Data and Methods
In SYKE the method for producing Corine Land Cover 2018 relies on data integration. Automatic satellite image interpretation is used to find for example forest changes and gravel pits. Some classes are digitized by hand with the help of satellite images. Most of the classes are composed from existing geographic data, like Building and dwelling register, Topographic database, National Forest Inventory and Land parcel information system. From all of the input data a raster database with pixel size 20 by 20 meters will be produced. The vector database for European use will be generalized from that raster database.
Results
The outputs of the project are a national satellite image mosaic (IMAGE2012), raster land cover database with 20 m pixel size, raster land cover changes database with minimum mapping unit of 0.5 hectares, vector land cover database with minimum mapping unit of 25 hectares and vector land cover changes database with minimum mapping unit of 5 hectares. The latter two are for European use.
The Vector databases and satellite images are combined in EEA to form European wide digital land cover, land cover change and satellite imagery databases.
High Resolution Layers and Local Components
The High Resolution Layers are raster datasets with 20 m pixel and they are produced with automatic satellite image interpretation. Production will be centralized and the layers cover the whole Europe. Both validation and enhancement for the product 2015 will be done nationally.
Local Component data 2012 in Finland including Urban Atlas 2012, Riparian Zones and Natura 2000 Grasslands has also been validated and their usability estimated in the project..
Funding and co-operation partners
European Union funds the project and supervises the results. SYKE is responsible for the data production in Finland. Along with SYKE, Natural Resources Institute Finland is taking part in the verification and enhancement of the high resolution layers. National Land Survey, the Ministry of Agriculture and Forestry and Population Register Center provide the data that will be used in the CLC2018 production.
Further information
Finnish Environment Institute SYKE
Data and Information Centre, Geoinformatics Services and Geoinfotmatics Research groups
Latokartanonkaari 11, 00790 Helsinki
Pekka Härmä, puh. +358 400 148 738 firstname.lastname @ymparisto.fi [pekka harma]
Riitta Teiniranta, puh. +358 40 739 9081 firstname.lastname@ymparisto.fi [riitta teiniranta]
Markus Törmä, puh. +358 400 148 755 firstname.lastname@ymparisto.fi [markus torma]
Minna Kallio, puh. +358 400 148 741 firstname.lastname@ymparisto.fi [minna kallio]
Suvi Hatunen, puh. +358 40 740 8033 firstname.lastname @ymparisto.fi [suvi hatunen]
Iida Autio, puh. +358 50 339 1084 firstname.lastname @ymparisto.fi [iida autio]