• Arctic SDI catalogue
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Distribution of kelp on the coast of British Columbia extracted from CHS source data: 1904 - 2004

Kelp features were taken from digitized survey source fieldsheets produced by the Canadian Hydrographic Service (CHS). The area covered by this dataset encompasses various surveyed areas along the western coast of North America in British Columbia coastal waters. CHS has an extensive collection of hydrographic survey data in the form of field sheets based on over 100 years of surveying in Canada. Data has been collected using a wide range of methods and systems, from lead-line to modern day multi-transducer and multibeam systems. Positions have been established using the different types of terrestrial systems and methods available over many years - up to the latest advanced satellite positioning systems.

Fieldsheets that had not been previously digitizted were imported into ESRI ArcMap and georeferenced directly to WGS84 using CHS georeferencing standards and principles (charts.gc.ca). In order to minimize error, a hierarchy of control points was used, ranging from high survey order control points to comparing conspicuous stable rock features apparent in satellite imagery. The georeferencing result was further validated against satellite imagery, CHS charts and fieldsheets, the CHS-Pacific High Water Line (charts.gc.ca), and adjacent and overlapping Fieldsheets. Finally, the kelp features were digitized, and corresponding chart information (category of kelp, scale, source, title, year, and comments) was added as attributes to each feature. When digitizing kelp features the points were located at the optical center of the feature being digitized. This dataset includes a point and a polygon layer. Kelp that is located on land is historically valid.

Symbolized kelp is not always an exact location but indicates that kelp is present in the area. The symbol is a proxy.

The kelp attribute field does not distinguish between different types of kelp. The field has three variables that are kelp, seaweed and Aquatic Plants. Seaweed is the general name for marine plants of the Algae class which grow in long narrow ribbons. (International Maritime Dictionary, 2nd Ed.)

Kelp is one of an order (laminariales) of usually large, blade-shaped or vine-like brown algae. (IHO Dictionary, S-32, 5th Edition, 2611)

Aquatic Plants – Aquatic plants are used as to represent vegetation in fresh water rivers and lakes.

Geographically encompasses the kelp in the Western Coastal waters of North America (mainly Canada) and Temporally overlaps/continues from data extracted from the British Admiralties.

Simple

Date ( RI_366 )
2019-12-09
Date ( RI_367 )
2020-06-02
Date ( RI_368 )
2024-10-03
RI_409
  Government of Canada; Fisheries and Oceans Canada; Canadian Hydrographic Service - Peter Wills ( Supervisor Hydrographic Data Centre )
PO Box 6000 9860 W Saanich Rd , Sidney , British Columbia , V8L4B2 , Canada
(250) 363-6669
(250) 363-6323
Presentation form
modelDigital; modèleNumérique RI_393
Purpose
This dataset is a contribution to the development of a kelp distribution vector dataset. Bull kelp (Nereocystis leutkeana) and giant kelp (Macrocystis pyrifera) are important canopy-forming kelp species found in marine nearshore habitats on the West coast of Canada. Often referred to as a foundation species, beds of kelp form structural underwater forests that offer habitat for fishes and invertebrates. Despite its far-ranging importance, kelp has experienced a decline in the west coast of North America. The losses have been in response to direct harvest, increase in herbivores through the removal of predators by fisheries or diseases, increase in water turbidity from shoreline development as well as sea temperature change, ocean acidification, and increased storm activates. Understanding these impacts and the level of resilience of different kelp populations requires spatiotemporal baselines of kelp distribution.
Credit
Tenhunen, Kim (GIS Technician, GIS analyst)
Credit
Shultis, Tammy (Multidisciplinary Hydrogapher)
Status
completed; complété RI_593
RI_419
  Department Fisheries and Oceans - Canadian Hydrographic Service - Peter Wills ( Supervisor Hydrographic Data Centre )
PO Box 6000 9860 W Saanich Rd , Sidney , British Columbia , V84B2 , Canada
(250) 363-6669
(250) 363-6323
Maintenance and update frequency
notPlanned; nonPlanifié RI_542
Government of Canada Core Subject Thesaurus Thésaurus des sujets de base du gouvernement du Canada ( RI_528 )
  • Aquatic plants
  • Aquatic ecosystems
Classification
unclassified; nonClassifié RI_484
Use limitation
Open Government Licence - Canada (http://open.canada.ca/en/open-government-licence-canada)
Access constraints
license; licence RI_606
Use constraints
license; licence RI_606
Use limitation
Not to be used for navigation
Spatial representation type
vector; vecteur RI_635
Metadata language
eng; CAN
Character set
utf8; utf8 RI_458
Topic category
  • Biota
  • Oceans
  • Geoscientific information
  • Location
Description
Geographically encompasses the kelp in the Western Coastal waters of North America (mainly Canada) and Temporally overlaps/continues from data extracted from the British Admiralties.
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Begin date
1904-12-31
End date
2004-05-13
Reference system identifier
https://epsg.io / EPSG:4326 /
Distribution format
  • SHP ( 1 )

    File decompression technique
    .zip

  • SHP ( 1 )

    File decompression technique
    .zip

Distributor

RI_409
  Government of Canada; Fisheries and Oceans Canada; Canadian Hydrographic Service - Peter Willis ( Hydrographic Data Centre Supervisor )
9860 West Saanich Road PO Box 6000 , Sidney , British Columbia , V8L 4B2 , Canada
(250) 363-6669
Fees
No
Ordering instructions
Digital Download
OnLine resource
Distribution of kelp on the coast of British Columbia extracted from CHS source data: 1904-2004 ( HTTPS )

Dataset;SHP;eng,fra

OnLine resource
Data Dictionary ( HTTPS )

Supporting Document;PDF;eng,fra

OnLine resource
Distribution of kelp on the coast of British Columbia extracted from CHS source data: 1904-2004 ( ESRI REST: Map Server )

Web Service;ESRI REST;eng

OnLine resource
Distribution of kelp on the coast of British Columbia extracted from CHS source data: 1904-2004 ( ESRI REST: Map Server )

Web Service;ESRI REST;fra

File identifier
9a6f8163-3ee5-4dd0-acf4-4c8fde4126a3 XML
Metadata language
eng; CAN
Character set
utf8; utf8 RI_458
Hierarchy level
dataset; jeuDonnées RI_622
Date stamp
2025-02-04T20:09:06.117Z
Metadata standard name
North American Profile of ISO 19115:2003 - Geographic information - Metadata
Metadata standard version
CAN/CGSB-171.100-2009
RI_409
  Government of Canada; Fisheries and Oceans Canada; Canadian Hydrographic Service - Peter Wills ( Supervisor Hydrographic Data Centre )
PO Box 6000 9860 W Saanich Rd, Sidney, BC, V8L4B2 , Sidney , British Columbia , V8L4B2 , Canada
(250) 363-6669
(250) 363-6323
 
 

Overviews

overview
chs_source_thumbnail_overview.png

Spatial extent

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Keywords


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Associated resources

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