CHS Low Water Mark Lines

The Canadian Hydrographic Service (CHS) Low Water Mark Lines provide alongshore and across-shore geomorphological and biological attributes of the low water mark shoreline. The lines are used in the CHS nautical charts to represent the level reached by sea water at low tide.

Data and Resources

Additional Info

Field Value
Last Updated April 17, 2026, 17:37 (UTC)
Created April 17, 2026, 17:37 (UTC)
contact_email GeoBCInfo@gov.bc.ca
contact_person {"en": "Government of British Columbia; Government of British Columbia; GeoBC Inquiries", "fr": "Gouvernement de la Colombie-Britannique; Gouvernement de la Colombie-Britannique; GeoBC Inquiries"}
criticality_level []
data_dictionary EPSG:3005,EPSG,unknown
geographic_scope []
open_canada_collection fgp
open_canada_date_published 2013-04-15 00:00:00
open_canada_keywords {"en": ["LWM", "coastal", "low water mark", "Government information"], "fr-t-en": ["LWM", "côtier", "point d'eau bas", "Information gouvernementale"]}
open_canada_subject ["nature_and_environment"]
sensitivity_level unrestricted
title_fr
update_frequency irregular