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• 02:06, 10 November 2023 Rob talk contribs created page Tile Server (Created page with "= Mapnik = = mod_tile = = renderd = = Coordinate Reference Systems and Projections = The data stored in the database and in raster form is very precisely referenced using Canada's official coordinate reference system, NAD83(CSRS) and vertical datum, CGVD2013. Some elevations are measured with respect to the local chart datum, and are calculated using a shift grid from CGVD2013 heights. Due to isostatic rebound and plate tectonics, all positions move with respect to...")