Relative Spectral Mixture Analysis for Australian Vegetation Cover

Supplying Relative Spectral Mixture Analysis (RSMA) measurements derived from MODIS imagery for Australia, quantifying changes in photosynthetic vegetation (PV), non-photosynthetic vegetation (NPV), and soil reflectance relative to a baseline date. The method, detailed in Okin (2007), is insensitive to changes in soil spectra but does not convey absolute cover levels.

Use Cases

• Analyze temporal changes in photosynthetic vegetation (PV) and non-photosynthetic vegetation (NPV) cover across Australia relative to a baseline date.
• Monitor spectral changes corresponding to fractional cover shifts for specific land areas over time.
• Investigate the relationship between soil reflectance changes and vegetation cover dynamics from a bird's-eye-view perspective.
• Apply the RSMA method to theoretically convert to absolute cover levels if baseline absolute values are known for a pixel.

Strengths

• Derived from MODIS satellite imagery, a standard source for remote sensing data.
• The RSMA method is specifically designed to be insensitive to changes in soil spectra.
• Covers the entire geographic region of Australia.
• Last updated in March 2026, indicating recent maintenance.

Limitations

• Provides only relative changes in cover, not absolute cover levels at any point in time.
• Dense canopy can prevent observation of underlying soil exposure, limiting data accuracy in forested areas.
• The specific temporal range, spatial resolution, and volume of data points (rows) are unknown.

Provenance

Source

Terrestrial Ecosystem Research Network's Data Discovery via data.gov.au.

Collection Method

Derived from passive remote sensing MODIS imagery using the Relative Spectral Mixture Analysis (RSMA) method.

Freshness

Last updated on 2026-03-20.

Geography

Australia.