Keywords:
DRILL HOLE, DRILL METHODS, DRILLS, DRILLING, DIAMOND DRILL HOLE, OVERBURDEN DRILL HOLE, PERCUSSION DRILL HOLE, REVERSE CIRCULATION, UNDERGROUND DRILLING, WEDGED DIAMOND DRILL HOLE, PERCUSSIVE, GEOLOGY, MINERALS, MINES, MINING, Drillhole, open data
GEOLOGY, MINERAL CONTENT, MINING
Drilling, Forage, Geology, Géologie, Mining industry, Industrie minière, Minerals, Minerai
Place Keywords:
Continent > North America > Canada > Ontario
Purpose:
The Ontario Drill Hole Database is a digital geoscience database providing information about exploration drill holes within the province of Ontario. The database will assist exploration companies in their efforts to locate new deposits and allow research within the Province of Ontario through effective access to drill hole records in Ontario. The objective of this product is to collect and disseminate geoscience information for Ontario.
Supplemental Information:
The Ontario Drill Hole Database resides on ORACLE® relational database management system; the drill hole locations are handled by ESRI® ArcGIS® geographic information system software. Geospatial data are provided in North American Datum 1983 (NAD83) geographic co-ordinate system using Geodetic Reference System 1980 (GRS80). Horizontal Position Accuracy of Features: Drill hole collars are not typically surveyed for precise location; therefore, the degree of accuracy as to the location of a drill hole is dependent upon the source document that was submitted to the MNDM. Each original source has a perceived level of accuracy and this is registered as a field within the Database. The levels of accuracy are as follows: holes are centred on a mining claim as this is the only information available; hole location derived from sketch map of mining claim; location derived from digitizing from a 1:50,000 scale plot of the 1:250,000 scale Energy, Mines and Resources (EMR) maps; location derived from a detailed company map or the location information for the drill hole is from the submitted Report of Work. No numeric value has been defined for locational error. Vertical Position Accuracy of Features: Not Applicable.