Ontario 3D Mass Points And Breaklines From Aerial Photography

3D mass points and breakline features interpreted using photogrammetry from aerial photography. The Government of Ontario provides this data for geospatial specialists. It was last updated in March 2026.

Use Cases

• Generate digital elevation models from mass point and breakline data for terrain analysis.
• Create 3D surface models using breakline features for floodplain mapping and hydrological studies.
• Extract elevation contours from mass point data for land development and engineering design.
• Analyze terrain changes over time by comparing photogrammetrically derived breaklines from different years.

Strengths

• Data is organized into downloadable tile packages for efficient regional access.
• Derived from aerial photography via photogrammetry, a standard method for elevation data capture.
• Maintained and updated by the Government of Ontario, an authoritative source.

Limitations

• Specific row count, spatial resolution, and temporal coverage of the aerial photography are unknown.
• Data volume and file sizes per tile package are not specified, complicating download planning.
• The description lacks details on vertical accuracy, point density, or breakline feature classification.

Provenance

Source

Government of Ontario

Collection Method

Photogrammetric interpretation of aerial photography.

Freshness

Last updated March 2026.

Geography

Ontario, Canada