Detailed Hydrographic Network For 12 Montérégie Regions

A detailed hydrographic network mapping all visible flow channels across 12 MRCs in Montérégie, Quebec. The project was photo-interpreted using orthophotos from 2018-2020 and LiDAR-derived shaded relief from 2008-2020, funded by the Montérégie FRR program.

Use Cases

• Analyze flow channel density and patterns across the 12 MRC territories.
• Integrate hydrographic network geometry with LiDAR-derived shaded relief data for terrain analysis.
• Use the photo-interpreted channel data as a base layer for wetland and water environment studies under the PRADMHH program.

Strengths

• High-resolution source imagery, including 10 cm and 20 cm resolution orthophotos.
• Multi-source data integration from orthophotos (2018-2020) and LiDAR data (2008-2020).
• Covers a defined administrative area of 12 MRCs in Montérégie.

Limitations

• Spatial resolution of the source mapping varies from 1:500 to 1:2000 scale.
• LiDAR source data has a temporal range from 2008 to 2020, introducing potential inconsistencies.
• Lack of available sample data or column descriptions limits understanding of attribute details.

Provenance

Source

Government and Municipalities of Québec.

Collection Method

Photo-interpretation project using orthophotos and LiDAR-derived shaded relief.

Time Range

Source orthophotos from 2018 and 2020; LiDAR data from 2008-2020.

Freshness

Metadata updated March 2026; underlying data ranges from 2008 to 2020.

Geography

Territory of 12 MRCs (Municipalités Régionales de Comté) in Montérégie, Quebec.