Watercourse modification (HOLAS 2)
Short description
Location of water course modifications (trenching, culverting, canalisation). The data was made available by HELCOM Contracting Parties in response to data request. The data was received from Estonia, Finland and Poland. Data reported by Finland and Poland as water course modification were interpreted as pipelines and were included in HELCOM HOLAS 2 Pipelines dataset. The activity was declared as not relevant in Germany and Lithuania. From Latvia, Russia and Sweden no data was reported.
Point of contact
HELCOM Secretariat
data@helcom.fi
Spatial extent
['21.9589', '24.296296', '58.040197', '58.587517']
Type
dataset
Metadata information
Identifier
Keywords
Hydrography ; GEMET - INSPIRE themes, version 1.0 ;

built environment ; GEMET ;

MADS ; HOLAS2 ;

Resource provider(s)
HELCOM Secretariat
data@helcom.fi

Lineage
The Estonian dataset has been collected from environmental permissions of the special use of available water via Republic of Estonia Environmental Board environmental services webpage (https://eteenus.keskkonnaamet.ee/ ?page=avalik_stat_koond&act=avalik_info&u=20160316143654) Data reported by Finland and Poland as water course modification were interpreted as pipelines and were combined with HELCOM HOLAS 2 Pipelines dataset. The Finnish dataset about underwater pipelines were extracted from the Finnish Transport Agency’s View & Download service (nautical charts). The data is based on information received from regional operators. The data quality is based on their individual quality specifications. The data set is created 7.4.2010, and in the original data year of construction is unknown. The boundaries of the objects in the Polish dataset come from permissions given by Maritime Office Gdynia. Modification structure types were checked from the internet by their permission identification number. The dataset was approved by all HELCOM Contracting Parties in the HOLAS II Human activities data review process during first quarter of 2017. constructi: Year of construction (year/ under construction) permission: Year of granted environmental permission for watercourse modification (year) document_i: Permission id Length: Length of modification structure (m) Modificati: Modification structure type (trenching, canalisation/pipeline) Estimated: Estimation of completion if constructi= under construction (date) Lat_Start: x-coordinate point of line start Long_Start: y-coordinate point of line start Long_End: y-coordinate point of line end Lat_End: x-coordinate point of line end Lat_Mid: x-coordinate point of line midpoint Long_Mid: y-coordinate point of line midpoint Country: Country