Coastline fetch estimates for Pacific Canada

Coastline fetch estimates for Pacific Canada Fetch is a useful proxy for exposure (an important driver of nearshore species distributions) in the absence of a wind-wave model. We derived the first-ever coast-wide estimates of fetch for Pacific Canadian waters. Fetch was calculated for over 41,720 km of the British Columbia coastline, at 50 m intervals, yielding 811,727 nearshore fetch points. Fetch was calculated for five regions in Pacific Canada: Haida Gwaii (HG), Queen Charlotte Strait (QCS), Strait of Georgia (SOG), West Coast Vancouver Island (WCVI), and the North Central Coast (NCC; Prince Rupert to Cape Caution). For all regions, a bearing interval of 5 degrees was used to generate fetch lines for each point along the shoreline, resulting in 72 fetch lines per point. A maximum fetch distance of 200 km was used to ensure the barrier effect of Haida Gwaii was captured. Supplementary information provided includes the fetch geometry calculator script and user guide (Gregr 2014) and a report on the fetch processing objectives, process, and results (Gregr 2015). 2023-07-11 Fisheries and Oceans Canada Joanne.Lessard@dfo-mpo.gc.ca Nature and EnvironmentFetchWavesExposureCoastal zoneHabitatsOcean energyCoastsWind Coastline Fetch Estimates for Pacific Canada - GeodatabaseFGDB/GDB https://pacgis01.dfo-mpo.gc.ca/FGPPublic/Coastline_Fetch_Estimates_Pacific_Canada/Fetch_all_BC.gdb.zip ReferencesPDF https://pacgis01.dfo-mpo.gc.ca/FGPPublic/Coastline_Fetch_Estimates_Pacific_Canada/References_EN_FR_CFEforPC.pdf Data DictionaryCSV https://pacgis01.dfo-mpo.gc.ca/FGPPublic/Coastline_Fetch_Estimates_Pacific_Canada/Data_dictionary_EN_CFEforPC.csv Data DictionaryCSV https://pacgis01.dfo-mpo.gc.ca/FGPPublic/Coastline_Fetch_Estimates_Pacific_Canada/Dictionnaire_de_donnees_FR_CFEforPC.csv Coastline Fetch Estimates for Pacific Canada - GIS Hub metadataPDF https://pacgis01.dfo-mpo.gc.ca/FGPPublic/Coastline_Fetch_Estimates_Pacific_Canada/GISHub_metadata_EN_CFEforPC.pdf Coastline Fetch Estimates for Pacific Canada - GIS Hub metadataPDF https://pacgis01.dfo-mpo.gc.ca/FGPPublic/Coastline_Fetch_Estimates_Pacific_Canada/GISHub_metadata_FR_CFEforPC.pdf Coastline Fetch Estimates for Pacific CanadaESRI REST https://gisp.dfo-mpo.gc.ca/arcgis/rest/services/FGP/Coastline_Fetch_Estimates_Pacific_Canada/MapServer Coastline Fetch Estimates for Pacific CanadaESRI REST https://gisp.dfo-mpo.gc.ca/arcgis/rest/services/FGP/Coastline_Fetch_Estimates_Pacific_Canada/MapServer

Fetch is a useful proxy for exposure (an important driver of nearshore species distributions) in the absence of a wind-wave model. We derived the first-ever coast-wide estimates of fetch for Pacific Canadian waters. Fetch was calculated for over 41,720 km of the British Columbia coastline, at 50 m intervals, yielding 811,727 nearshore fetch points. Fetch was calculated for five regions in Pacific Canada: Haida Gwaii (HG), Queen Charlotte Strait (QCS), Strait of Georgia (SOG), West Coast Vancouver Island (WCVI), and the North Central Coast (NCC; Prince Rupert to Cape Caution). For all regions, a bearing interval of 5 degrees was used to generate fetch lines for each point along the shoreline, resulting in 72 fetch lines per point. A maximum fetch distance of 200 km was used to ensure the barrier effect of Haida Gwaii was captured.

Supplementary information provided includes the fetch geometry calculator script and user guide (Gregr 2014) and a report on the fetch processing objectives, process, and results (Gregr 2015).

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Contact Information

Delivery Point: Pacific Biological Station 3190 Hammond Bay Road

City: Nanaimo

Administrative Area: British Columbia

Postal Code: V9T 6N7

Country: Canada

Electronic Mail Address: Joanne.Lessard@dfo-mpo.gc.ca

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