Quebec Geodetic Network Points and Calibration Bases

Quebec's geodetic network contains approximately 112,000 landmarks grouped under six themes, including permanent GNSS stations and planimetric networks. The vector data includes fields for original number, service number, state of the point, and its theme. A separate network of permanent calibration bases for electronic rangefinders is established across eight main municipalities in the region.

Use Cases

• Map and analyze the distribution of geodetic points by theme to assess network coverage density across Quebec.
• Filter points by state to identify and inventory landmarks presumed destroyed or damaged for maintenance planning.
• Use the original number and service number fields to trace historical records or integrate with other cadastral datasets.
• Reference the municipal calibration base PDFs to obtain inter-pillar distances for validating surveying equipment.

Strengths

• Approximately 112,000 geodetic points provide a dense reference network for the region.
• Points are categorized into six distinct thematic groups, enabling structured analysis.
• Data includes specific attributes like point state and theme for filtering and classification.
• Complementary calibration base documentation is available for eight key municipalities.

Limitations

• Point coordinates are approximate with a stated accuracy of ± two meters, limiting precision applications.
• The calibration base data is provided in separate PDF documents, not in a unified, machine-readable format.
• Sample data and exact row/column counts for the vector files are unavailable for pre-inspection.

Provenance

Source

Government and Municipalities of Québec

Collection Method

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Time Range

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Freshness

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Geography

Quebec, Canada