• HELCOM Metadata catalogue
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Input of hazardous substances (HOLAS 2)

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.

Simple

Date (Publication)
2016-12-13
Unique resource identifier
https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/5e407922-40c9-4844-9c77-ca86e086d491
pointOfContact
  HELCOM Secretariat

GEMET - INSPIRE themes, version 1.0

  • Bio-geographical regions

GEMET

  • environmental impact

  • hazardous substance

Keywords
  • MADS

  • HOLAS2

Use constraints
Other restrictions
Other constraints

Use constraints: Data can be used freely given that the source is cited.

Access constraints
Other restrictions
Other constraints
Access constraints: No limitations on public access.
Spatial representation type
Grid
Metadata language
English
Topic category
  • Environment
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Begin date
2011-01-01
End date
2015-12-13
Unique resource identifier
EPSG:3035
Distribution format
  • TIFF ( )

OnLine resource
Download dataset ( WWW:LINK-1.0-http--link )
OnLine resource
Open in Map Viewer ( WWW:LINK-1.0-http--link )
Hierarchy level
Dataset

Conformance result

Date (Publication)
2010-12-08
Statement

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.

File identifier
5e407922-40c9-4844-9c77-ca86e086d491 XML
Metadata language
English
Character set
UTF8
Hierarchy level
Dataset
Date stamp
2023-03-15T14:45:17
pointOfContact
  HELCOM Secretariat
 
 

Overviews

Spatial extent

N
S
E
W
thumbnail


Keywords

GEMET
environmental impact hazardous substance
GEMET - INSPIRE themes, version 1.0
Bio-geographical regions

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