Canadian National Marine Seismic Data Repository

The Geological Survey of Canada (Atlantic and Pacific) has collected marine survey field records on marine expeditions for over 50 years. This release makes available the results of an ongoing effort to scan and convert our inventory of analog marine survey field records (seismic, sidescan and sounder) to digital format. These records were scanned at 300 dpi and converted into JPEG2000 format. Typically, each of these files was between 1 to 2 gbyte in size before compression and compressed by a factor of 10:1. Empirical tests with a number of data sets suggest that there is minimal visual distortion of the scanned data at this level of compression. In this KML file, scanned data are available in a reduced-scale thumbnail format and a compressed full-resolution JPEG2000 format.

Data and Resources

Additional Info

Field	Value
Last Updated	April 17, 2026, 21:35 (UTC)
Created	April 17, 2026, 21:35 (UTC)
contact_email	nrcan.gsc-geosciencedata-donneesgeoscience-cgc.rncan@canada.ca
contact_person	{"fr": "Gouvernement du Canada; Ressources naturelles Canada; Commission géologique du Canada - CGC Atlantique,Gouvernement du Canada; Ressources naturelles Canada; Commission géologique du Canada,sheila.hynes@canada.ca,nrcan.gsc-geosciencedata-donneesgeoscience-cgc.rncan@canada.ca", "en": "Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Atlantic,Government of Canada; Natural Resources Canada; Geological Survey of Canada,voice; 1 (902) 4268355,sheila.hynes@canada.ca,nrcan.gsc-geosciencedata-donneesgeoscience-cgc.rncan@canada.ca"}
criticality_level	[]
data_dictionary	EPSG:4326,http://www.epsg-registry.org/,6.14
geographic_scope	[]
open_canada_collection	fgp
open_canada_date_published	2020-07-07 00:00:00
open_canada_keywords	{"fr": ["géophysique", "géologie", "marin", "sciences de la terre", "sismique", "sonar latéral", "haute résolution", "système d'information géographique", "sonde de fond", "Géologie", "Géophysique", "Fond marin", "Sismologie"], "en": ["geophysics", "geology", "marine", "earth sciences", "seismic", "sidescan sonar", "high resolution", "geographic information system", "sub-bottom sounder", "Geology", "Geophysics", "Ocean floor", "Seismology"]}
open_canada_subject	["form_descriptors", "nature_and_environment", "science_and_technology"]
sensitivity_level	unrestricted
title_fr	Répertoire de données sismiques maritimes nationales
update_frequency	irregular