Seasonal Ground Cover Difference Images for Queensland Since 1987

A source of seasonal difference images comparing current ground cover to a historical reference for Queensland from 1987 to present. It is generated using a modified dynamic reference cover method applied to Landsat data, excluding cleared areas and undulating slopes. The output consists of images where negative pixel values indicate locations with less cover than their historical reference.

Use Cases

• Analyze spatial patterns of vegetation loss by identifying pixels with negative difference values relative to reference pixels.
• Monitor seasonal ground cover dynamics using the time-series of difference images from 1987 onward.
• Apply the modified dynamic reference cover method, which excludes cleared areas and undulating slopes, to assess land suitability for reference pixels.
• Study the impact of low-rainfall years by examining the minimum ground cover image used to establish reference pixels.

Strengths

• Time-series data spans from 1987 to the present, providing over 35 years of seasonal observations.
• The method is based on the JRSRP Fractional Cover 3.0 algorithm, a defined standard for ground cover analysis.
• Covers the entire state of Queensland, offering comprehensive spatial coverage for the region.
• Explicitly excludes cleared areas and undulating slopes from reference pixel selection, refining the analysis.

Limitations

• The dataset consists of processed image outputs (PNG, WMS) rather than raw tabular data, limiting direct numerical analysis.
• Specific technical details on pixel resolution, data volume, or update frequency for the seasonal products are not provided.
• Relies on the Landsat satellite record, which may have data gaps due to cloud cover or sensor issues.

Provenance

Source

Terrestrial Ecosystem Research Network's Data Discovery

Collection Method

Generated using a modified version of the Bastin et al. (2012) dynamic reference cover method applied to Landsat data, producing seasonal difference images.

Time Range

1987 to present

Freshness

Last metadata update was 2026-03-20, indicating recent maintenance.

Geography

Queensland, Australia