Quebec Landsat Annual Mosaics from 1984 to Present

Quebec's annual Landsat mosaics provide a consistent 30-meter resolution portrait of the entire province. The time series covers from 1984 to the present, with images acquired between July and August each year. These mosaics are produced in collaboration with the Laurentian Forestry Center of the Canadian Forest Service and the Directorate-General for Geospatial Information of the Ministry of Natural Resources and Forests.

Use Cases

• Analyzing the evolution of natural environments over more than 40 years based on the annual time series.
• Monitoring urban sprawl and agricultural activities using the consistent 30-meter resolution imagery.
• Tracking transformations of protected areas and water networks like reservoirs and dams.
• Identifying the exact date of pixel capture for phenological studies using the Julian day matrix.

Strengths

• Time series covering more than 40 years, from 1984 to the present.
• 30-meter spatial resolution providing detailed landscape views.
• Production based on selection of the best optical quality pixel for consistency.
• Includes matrices for the source year, Julian day, and Landsat sensor for each pixel.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Mosaics from 1984 to 1989 have areas with no data due to limited satellite acquisition capacity.
• Some artifacts may be present where no cloud-free images were acquired in a given year.

Provenance

Source

Government and Municipalities of Québec, produced with the Laurentian Forestry Center of the Canadian Forest Service.

Collection Method

Mosaics are created from Landsat Collection 2 Surface Reflectance data, selecting the best optical quality pixel.

Time Range

1984 to present

Freshness

Last updated 2026-05-20 17:40:10.753522; freshness should be verified.

Geography

Quebec, Canada