50a19d2e-bc8a-40f3-a786-9e26274778a6 English HELCOM Secretariat data@helcom.fi 2023-03-15T14:45:34 EPSG:3035 Changes to hydrological conditions (HOLAS 2) 2018-01-15 https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/50a19d2e-bc8a-40f3-a786-9e26274778a6 Pressure layer combines all human activities that cause changes to hydrological conditions. The human activities were presented as point data which were given spatial extents (given below). The pressure value was given as the proportion of the grid cell under the pressure. The following human activities were combined into the changes to hydrological conditions layer; - Hydropower dams (a 1km2 grid cell in the river estuary was selected) - Water course modification (1 km) - Wind turbines (operational, 0.3 km, linear decline) - Oil platforms (0.5 km, linear decline) The human activity datasets were first processed separately covering the whole Baltic Sea and then summed together and overlapping areas were dissolved to remove double counting. Attenuation gradients are assigned to each layer as described above. Area effected decreases when distance from avtivity increases. Layer was normalized. HELCOM Secretariat data@helcom.fi Hydrography GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme environmental impact GEMET 2018-08-16 geonetwork.thesaurus.external.theme.gemet-en MADS HOLAS2 Spatial Pressures Use constraints: Data can be used freely given that the source is cited. Access constraints: No limitations on public access. English environment 7.818737 33.903834 52.502121 66.484464 2011-01-01 2015-12-13 TIFF https://maps.helcom.fi/website/MADS/download/?id=50a19d2e-bc8a-40f3-a786-9e26274778a6 WWW:LINK-1.0-http--link Download dataset Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 Data source: See separate fact sheet on human activities listed in the description. Data quality: Gaps may occur. Attribute information: Raster values represent the area effected (km2). Spatial resolution: Original data as vectors, finally converted to 1 km x 1 km grid.