2023 Orthophotograph Mosaics For Montérégie Region At 20cm Resolution

Spring 2023 orthophotograph mosaics cover the Montérégie administrative region of Québec. The data consists of geographically positioned natural color images with a spatial resolution of 20 centimeters, distributed as 5 km x 5 km GeoTIFF tiles. These mosaics were produced through regional partnerships and are available under a Creative Commons license.

Use Cases

• Train semantic segmentation models on high-resolution 20cm natural color imagery for land cover classification.
• Perform change detection analysis by comparing these 2023 orthophotographs with imagery from other years.
• Extract geographic features and infrastructure from the positioned image mosaics for regional planning.
• Use the 5 km x 5 km tile structure for large-scale, distributed geospatial processing workflows.

Strengths

• High spatial resolution of 20 centimeters provides detailed ground-level visibility.
• Covers the entire Montérégie administrative region, excluding specific parts of the Montreal Metropolitan Community.
• GeoTIFF format with geographic positioning enables direct use in GIS applications.
• Data is licensed under Creative Commons 4.0, allowing for free download and reuse.

Limitations

• Single temporal snapshot from spring 2023 limits longitudinal or seasonal analysis.
• Coverage excludes most of the Montreal Metropolitan Community, creating a geographic data gap for that urban area.
• The automated translation note on the metadata suggests potential for minor inaccuracies in descriptive text.

Provenance

Source

Government and Municipalities of Québec

Collection Method

Assembly of orthophotographs produced in spring 2023, positioned geographically with relief correction, resulting from regional partnerships.

Time Range

Spring 2023

Freshness

Data reflects conditions from spring 2023; metadata was last updated in March 2026.

Geography

Montérégie administrative region, Québec, excluding most of the Montreal Metropolitan Community.