Canada - Magnetic survey data compilation

This data set is a compilation of data acquired mostly by airborne surveys in Canada, gridded at 200 m and 1 km resolutions. The Geological Survey of Canada has flown or supervised more than 700 surveys since 1947, generally with a flight-line spacing of 800 m and an altitude of 305 m above the ground, though since 2000 the majority of surveys have been flown with a line spacing of 400 m or less. These aeromagnetic surveys have been leveled to each other to correct for arbitrary datums, slow variations of Earth's magnetic field over time, and differing survey specifications. The magnetic character of a rock depends on its ferromagnetic mineral composition, its concentration and its deformational and metamorphic history. Variations in the magnetic character of Earth's crust cause small magnetic anomalies in the earth's magnetic field. These magnetic anomalies can show geological trends and structural boundaries. The first vertical derivative of magnetic anomalies is calculated from the residual magnetic field and enhances the short wavelength component of the field. It is often used to trace contacts between magnetic domains. These data have also been published as two Geological Survey of Canada Open File maps: Magnetic Anomaly Map, Canada, (Open File 7799) and the First Vertical Derivative of the Magnetic Anomalies Map, Canada, (Open File 7878).

Date ( RI_367 ): 2017-05-23

Date ( RI_366 ): 2017-05-23

RI_415

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Central Canada - Frank Kiss ( Geophysicist )

601 Booth Street , Ottawa , Ontario , Canada

voice; 1 (613) 617-8782
http://gdr.agg.nrcan.gc.ca/gdrdap/dap/search-eng.php

RI_413

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Central Canada - Geophysics Data Center

601 Booth Street , Ottawa , Ontario , Canada

voice; 1 (613) 995-5326
http://gdr.agg.nrcan.gc.ca/gdrdap/dap/search-eng.php

RI_409

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Central Canada - Geophysics Data Center

601 Booth Street , Ottawa , Ontario , Canada

voice; 1 (613) 995-5326
http://gdr.agg.nrcan.gc.ca/gdrdap/dap/search-eng.php

RI_418

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Central Canada - Douglas Oneschuk ( Physical Scientist )

601 Booth Street , Ottawa , Ontario , Canada

voice; +1 (613) 947-3337
http://gdr.agg.nrcan.gc.ca/gdrdap/dap/search-eng.php

RI_414

Government of Canada; Natural Resources Canada; Geological Survey of Canada

Presentation form: tableDigital; tableNumérique RI_397

Name: Data

Purpose: Magnetic field measurements reflect magnetic properties of bedrock. They provide qualitative and quantitative information used in geological mapping. Understanding the geology assists in mineral exploration activities and provides useful information necessary for communities, aboriginal associations, and government to make land use decisions.

Status: completed; complété RI_593

RI_412

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Central Canada - Geophysics Data Center

601 Booth Street , Ottawa , Ontario , Canada

voice; 1 (613) 995-5326
http://gdr.agg.nrcan.gc.ca/gdrdap/dap/search-eng.php

Maintenance and update frequency: asNeeded; auBesoin RI_540

GSC Keywords Vocabulary - Thesaurus Thésaurus - vocabulaire de mots-clé de la CGC ( RI_528 )

Geophysics
Geophysics, general

NRCan - GSC - Geophysics - Keywords list Liste de mots-clés - RNCan - CGC - Géophysique ( RI_528 )

Magnetic anomalies

Government of Canada Core Subject Thesaurus Thésaurus des sujets de base du gouvernement du Canada ( RI_528 )

Earth sciences
Geophysics

Use limitation: No constraint

Use limitation: Open Government Licence - Canada (http://open.canada.ca/en/open-government-licence-canada)

Access constraints: license; licence RI_606

Use constraints: otherRestrictions; autresRestrictions RI_609

Spatial representation type: grid; grille RI_636

Distance: 200.00 http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/uom/gmxUom.xml#metre

Metadata language: eng; CAN

Metadata language: fra; CAN

Character set: utf8; utf8 RI_458

Topic category

Geoscientific information

Description: Canada

Begin date: 1946-12-31

End date: 2015-12-30

Supplemental Information: The 1 km gridded data were last updated in 2015, the 200 m gridded data were last updated in 2020 with data available until 2018

Reference system identifier: http://www.epsg-registry.org/ / EPSG: 3978 / 6.14

Spatial representation info

No information provided.

Distribution format

GRD ( not applicable )

RI_412

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Central Canada - Geophysics Data Center

601 Booth Street , Ottawa , Ontario , Canada

voice; 1 (613) 995-5326
http://gdr.agg.nrcan.gc.ca/gdrdap/dap/search-eng.php

RI_414

Government of Canada; Natural Resources Canada; Geological Survey of Canada

Transfer size: 1000

OnLine resource: First vertical derivative of magnetic anomalies, Canada (1 km grid) - French ( HTTP )
Dataset;ZIP;fra

OnLine resource: First vertical derivative of magnetic anomalies, Canada (1 km grid) - English ( HTTP )
Dataset;ZIP;eng

OnLine resource: First vertical derivative of magnetic anomalies, Canada (200 m grid) - French ( HTTP )
Dataset;ZIP;fra

OnLine resource: First vertical derivative of magnetic anomalies, Canada (200 m grid) - English ( HTTP )
Dataset;ZIP;eng

OnLine resource: Residual total magnetic field, Canada (1 km grid) - English ( HTTP )
Dataset;ZIP;eng

OnLine resource: Residual total magnetic field, Canada (1 km grid) - French ( HTTP )
Dataset;ZIP;fra

OnLine resource: Residual total magnetic field, Canada (200 m grid) - English ( HTTP )
Dataset;ZIP;eng

OnLine resource: Residual total magnetic field, Canada (200 m grid) - French ( HTTP )
Dataset;ZIP;fra

OnLine resource: First vertical derivative of magnetic anomalies map, Canada (Open File 7878) - French ( HTTPS )
Supporting Document;PDF;fra

OnLine resource: First vertical derivative of magnetic anomalies map, Canada (Open File 7878) - English ( HTTPS )
Supporting Document;PDF;eng

OnLine resource: Magnetic anomaly map, Canada (Open File 7799) - French ( HTTPS )
Supporting Document;PDF;fra

OnLine resource: Magnetic anomaly map, Canada (Open File 7799) - English ( HTTPS )
Supporting Document;PDF;eng

OnLine resource: Web map service - French ( HTTP )
Dataset;WMS;fra

OnLine resource: Web map service - English ( HTTP )
Dataset;WMS;eng

Hierarchy level: dataset; jeuDonnées RI_622

Statement: Compilation of all survey data and grid generation

Description: 1) Generate grids from point data

2) Merge the grids together

3) Any additional (new) grids are merged into the original grid as needed.

4) Convert grids to HGD files, upload them to the DAP server and register them on the DAP