LBA-ECO LC-21: Brazilian Amazon Fractional Land Cover Images (1999-2002)

LBA-ECO LC-21 provides Landsat Enhanced Thematic Mapper Plus (ETM+) imagery and derived fractional land cover products for eight Brazilian Amazon states from 1999 to 2002. The data was processed using the Carnegie Landsat Analysis System (CLAS) methodology to estimate subpixel fractions of photosynthetic vegetation, non-photosynthetic vegetation, and bare substrate within each 30x30 meter pixel. The collection consists of 584 compressed files which expand to 1,717 GeoTIFF image files, with cloud, shadow, and water masks applied.

Use Cases

• Tracking deforestation and land cover change in the Brazilian Amazon based on multi-year, state-level imagery.
• Quantifying fractional vegetation cover for ecological modeling using the subpixel PV, NPV, and bare substrate estimates.
• Validating other land cover products or algorithms against the CLAS-processed fractional maps.
• Analyzing seasonal or interannual variations in non-photosynthetic vegetation (e.g., dry season biomass) from the time-series imagery.

Strengths

• Contains 1,717 processed GeoTIFF images derived from a consistent, peer-reviewed methodology (CLAS).
• Covers a critical four-year time period (1999-2002) for eight key Amazonian states.
• Provides subpixel fractional estimates, offering more detail than traditional categorical land cover maps.

Limitations

• Metadata completeness is low: column names, exact file sizes, and a clear license are unspecified.
• There is a significant conflict in reported 'last updated' dates between platforms (2003 vs. 2026), casting doubt on metadata maintenance.
• The temporal coverage is limited to a historical window and may not reflect recent conditions.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Landsat ETM+ imagery processed using the Carnegie Landsat Analysis System (CLAS) methodology (Asner et al., 2005).

Time Range

1999-2002

Freshness

2026-04-10 01:45:25.397883

Geography

Selected Brazilian states: Acre, Amapa, Amazonas, Maranhao, Mato Grosso, Para, Rondonia, and Roraima.