To enable the rapid dissemination of information, this map data is unedited. Discrepancies or inaccuracies may occur for which the Ontario Ministry of Northern Development and Mines does not assume liability. Users should verify critical information. This product is intended for use at scales of 1:250 000 and smaller. Use of this product at larger, detailed scales will result in use for which this product was never intended.
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Geology Data Compiled from various sources.
Ontario Geological Survey, Ministry of Northern Development and Mines: OGS and Various Geological Survey Publications: This geological map of Ontario was compiled at a scale of 1:1,000,000 mainly from maps and reports of the Ontario Geological Survey, the Geological Survey of Canada, and the Geological Surveys of Manitoba, Quebec, New York, Minnesota and Michigan. In addition, the compilation incorporated unpublished maps and reports on file with the Ontario Geological Survey, university theses, papers in professional journals, aeromagnetic maps, gamma ray spectrometric and gravity maps, aerial photographs and satellite images. Data collected from 01/01/1900 to 31/12/1988.
Ontario Geological Survey/Data Services Section/Ministry of Northern Development and Mines: 1'=4 mile ERLIS Bedrock Geology: The995 ERLIS : 250 000 Bedrock compilation project digitized the original Geology of Ontario inch = 4 mile manuscript maps. These maps were digitized but features such as map edge discontinuities were not resolved. Data collected from 01/01/1995 to 31/12/1995. The original 1:1 000 000 Bedrock Geology of Ontario was originally compiled at scales approximating 1:250 000 (1:253 440). These manuscript maps were further generalized in the creation of the final cartographic products. The original manuscript maps contain more data and information than the final maps. They became the source compilation base for the province. Additional data such as the 1:100 000 Abitibi Compilation product were integrated into the 1:250 000 Bedrock Geology product.
Ontario Geological Survey: Geological Compilation of the Timmins Area, MRD 36.: The Abitibi GIS Compilation Project. The Ontario Geological Survey compiled the geology of the Abitibi subprovince at a scale of: 100 000. MRD 36: Geological Compilation of the of the Timmins Area, Abitibi Greentone Belt (accompanies Pmap P.3379)
Ontario Geological Survey: Geological Compilation of the Lake Abitibi Area: The Abitibi GIS Compilation Project. The Ontario Geological Survey compiled the geology of the Abitibi subprovince at a scale of:100 000. MRD 46 Geological Compilation of the Lake Abitibi Area, Abitibi Greentsone Belt (accompanies P.3398).
Ontario Geological Survey: Geological Compilation of the Kirkland Lake Area: The Abitibi GIS Compilation Project. The Ontario Geological Survey compiled the geology of the Abitibi subprovince at a scale of: 100 000. MRD 58 Geological Compilation of the Kirkland Lake Area, Abitibi Greenstone Belt (accompanies P.3425).
Ministry of Northern Development and Mines: The Ontario Drill Hole Database ERLIS Data Set 13 (ODHDB): The Ontario Drill Hole Database re-released November999. Data from this set have been simplified for easy integration as a theme into compilations. The Ontario Drill Hole Database was created through the Earth Resources Land Information System initiative in 1995. This original data set contained 105,000 drill holes. The database was updated in 1999 bringing the total number of holes to 112903.
Ministry of Northern Development and Mines: ERLIS Data Set 6: Bedrock Geology: Seamless Coverage (GoO): Ontario Bedrock Geology: Seamless Coverage (1:1 000 000). The digital version of the Precambrian Geology of Ontario in a province wide seamless compilation. Precambrian geology for the Province of Ontario at 1:1 000 000.
Natural Resources Canada/Geomatics Canada: National Topographic Database at 1:250 000 (NTDB): NTDB:250K, the federal government (Geomatics Canada) released a topographic digital base covering the Province of Ontario in entirety.
Ministry of Northern Development and Mines: Data Sets 1035 and 1036 - Ontario Bouger Gravity and Aeromagnetic Data: Compiled geophysical data. The Ministry of Northern Development and Mines is released, in digital form, the Ontario Single Master Bouguer gravity and Aeromagnetic data for the Province of Ontario. The Single Master Aeromagnetic data was released earlier in digital form labeled ERLIS Dataset 1. The Bouguer Gravity Field of Ontario was compiled from approximately 55,639 gravity stations retrieved from the files of the Ontario Geological Survey (OGS) and the National Gravity Data Base of Geomatics Canada. The XYZ file of Bouguer Gravity data was used to create a 1000m by 1000m cell-size Bouguer gravity grid of Ontario. A 1000m by 1000m cell-size vertical gravity gradient grid of Ontario was also computed. The Bouguer Gravity XYZ values are provided in Microsoft(RegTM) EXCEL, ACCESS and ASCII text formats. In 1988-89, the OGS reprocessed and re-leveled forty one aeromagnetic surveys (thirty two, 0.5 mile flight line spacing digitized surveys and nine digitally acquired surveys, 1000 m flight line spacing), acquired between 1947 and 1987, flown by the OGS and the Geological Survey of Canada. Single Master 200 m by 200 m cell-size grids of the total field and its vertical gradient were computed and their colour images were released by the OGS, in the form of 1:1,000,000 colour maps. A CD-ROM containing magnetic XYZ and grid data was also released accompanied by a DOS(RegTM) based data viewing and manipulation software (ERLIS Dataset 1, March 1993). The magnetic data, contained on CD-ROM ERLIS Dataset 1 have been currently reformatted to take advantage of current operating systems.
Ministry of Northern Development and Mines: Data Set 1037 - Ontario Magnetic Super Grids: The Ministry of Northern Development and Mines released magnetic supergrids for six regions in Ontario. These supergrids are part of the Aeromagnetic-Electromagnetic (AMEM) project where thirty-two magnetic and electromagnetic surveys were reprocessed and individual total magnetic field and magnetic second vertical derivative grids were computed.