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Land contour data for Ontario includes contour lines, approximate lines, auxiliary or interpolated lines, and depression lines. The Government of Ontario collected the data on an irregular basis, with a last update recorded in March 2026. Contour intervals vary by region: 5 meters in southern Ontario, 10 meters in the near north, and variable intervals in the Far North.
Data is available in multiple formats including ESRI REST, PDF, DOCX, HTML, and ZIP, which may require specific GIS software for full utilization. License is OGL-CA-2.0.