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  • A collection of five crustal scale seismic refraction programs performed in Canada by the Geological Survey of Canada.

  • Electromagnetic anomalies represent anomalies from aerial geophysical surveys. **This third party metadata element was translated using an automated translation tool (Amazon Translate).**

  • High resolution 2D/3D seismic surveys performed for the Geological Survey of Canada to advance the use of seismic methods in hard rock environments.

  • Vertical seismic profiling (VSP) surveys done by the Geological Survey of Canada for research into downhole seismic imaging techniques for mineral exploration.

  • The term “geotechnical investigation site” is used hereafter to refer to the location where geotechnical (surveys and instrumentations) and geophysical data are available. The geotechnical and geophysical data included in the Open Data Portal presented in this document take the form of: Geotechnical Investigation Sites (site_inv_geotech_p) These are surveys produced by or for the department from the 1990s from the active DGG database. Data will be added as they are validated and ready for publication. Geotechnical Investigation Sites BDG (Site_INV_Geotech_BDG_P) These are drilling and surveys from an “inactive” database entrusted to DGG by the Ministry of Energy and Natural Resources (MERN). The results of these drilling and surveys were compiled by MERN in the 1970s and 1980s for their “forecasting” or “geotechnical soil suitability” mapping campaign. These data have been entrusted to DGG, which has been in custody since the mid-1980s following the MERN abandonment of its geotechnical division. This geotechnical database was acronym BDG. **This third party metadata element was translated using an automated translation tool (Amazon Translate).**

  • 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.