NTDB Correction Matrices, 2003-2009
This collection is a legacy product that is no longer maintained. It may not meet current government standards. The correction matrices for the National Topographic Data Base (NTDB), also known under the acronym CORMAT, are products derived from the planimetric enhancement of NTDB data sets at the 1:50 000 scale. The correction matrix enables users to enhance the geometric accuracy of the less accurate NTDB. The matrix is a set of points arrayed on a regular 100-m grid. Each point describes the planimetric correction (DX, DY) to be applied at this location. The position of the points is given in UTM (Universal Transverse Mercator projection) coordinates based on the North American Datum of 1983 (NAD83) . Each file constitutes a rectangular area covering the entire corresponding NTDB data set. Its delimitation corresponds more or less to National Topographic System (NTS) divisions at the 1:50 000 scale. All NTDB data sets at the 1:50 000 scale whose original accuracy was less than 30 m can thus be geometrically corrected. A CORMAT data set contains a list of coordinates and the corresponding corrections to be applied in the form X Y DX DY.
Related Products:
- Publisher - Current Organization Name: Natural Resources Canada
- Licence: Open Government Licence - Canada
Data and Resources
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NTDB at 1:50 000 Correction MatricesTXTNo linguistic content; Not applicable dataset TXT
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NTDB Correction Matrices - Product SpecificationsPDFEnglish guide PDF
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NTDB Correction Matrices - Product SpecificationsPDFFrench guide PDF
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CorMat PlugIn Tool - PlugIn and User GuideJAREnglish api JAR
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CorMat PlugIn Tool - PlugIn and User GuideJARFrench api JAR