5e407922-40c9-4844-9c77-ca86e086d491 English HELCOM Secretariat data@helcom.fi 2023-03-15T14:45:17 EPSG:3035 Input of hazardous substances (HOLAS 2) 2016-12-13 https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/5e407922-40c9-4844-9c77-ca86e086d491 Input of hazardous substances pressure layer is interpolated from CHASE Assessment tool concentration component. The contamination ratio values were calculated with CHASE Assessment tool for hazardous substances monitored in water, sediment and biota. Classified mean contamination ratio was used in the interpolation. Classification is based on the http://stateofthebalticsea.helcom.fi/about-helcom-and-the-assessment/downloads-and-data/. The points were interpolated to cover the entire Baltic Sea with Spline with barriers interpolation method. Please see "lineage" section below for further details on attributes, data source, data processing, etc. HELCOM Secretariat data@helcom.fi Bio-geographical regions GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme environmental impact hazardous substance GEMET 2018-08-16 geonetwork.thesaurus.external.theme.gemet-en MADS HOLAS2 Use constraints: Data can be used freely given that the source is cited. Access constraints: No limitations on public access. English environment 7.82333 33.858228 52.502121 66.430213 2011-01-01 2015-12-13 TIFF https://maps.helcom.fi/website/MADS/download/?id=5e407922-40c9-4844-9c77-ca86e086d491 WWW:LINK-1.0-http--link Download dataset https://maps.helcom.fi/website/mapservice/?datasetID=5e407922-40c9-4844-9c77-ca86e086d491 WWW:LINK-1.0-http--link Open in Map Viewer 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: HELCOM HOLAS II assessment of hazardous substances Data processing: Contamination ratio is calculated for each monitoring point and the "worst" ratio value of sediment, water or biota was chosen. Ratio is the result of measured concentration value divided by a threshold. Contamination ratios are grouped based on an agreed classification as follows: Original Concentration score; contamination status; classified pressure value =0.5; Low contamination; 0 0.5 < CS =1.0: Low contamination; 0 1.0 < CS =5.0; High contamination score; 0,25 5.0 < CS =10.0; High contamination score; 0,5 >10.0; High contamination score; 0,75 Classified values were aggregated to 1 x 1 km grid, by calculating the mean value. Points were interpolated with spline with barriers tool. Results were lightly generalised and after that normalised. Data quality: Good (some data gaps may still occur) Attribute information: pressure value, originating from classified CHASE values Spatial coverage: Whole Baltic Sea, some data gaps may occur in original point data. Spatial resolution: Original data as points, interpolated to 1 km x 1 km grid.