GLC_FCS30D: Global 30-Meter Land-Cover Maps from 1985 to 2022

GLC_FCS30D is a global land-cover monitoring product developed by Liangyun Liu of the Chinese Academy of Sciences. It provides 30-meter resolution data for 35 land-cover categories from 1985 to 2022, with updates every 5 years before 2000 and annually thereafter. The product was validated to achieve an overall accuracy of 80.88% for a 10-category system and 73.24% for a 17-category system.

Use Cases

• Analyzing long-term land-use change dynamics based on the 1985-2022 time series.
• Training or validating land-cover classification models based on the 35-category system.
• Monitoring deforestation or urbanization patterns based on the annual updates after 2000.
• Conducting global or regional environmental impact assessments based on the 30-meter resolution data.

Strengths

• Covers a long temporal range from 1985 to 2022.
• Provides a fine classification system with 35 land-cover categories.
• Achieves a validated overall accuracy of 80.88% for its basic 10-category system.
• Offers high spatial resolution at 30 meters.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and file size are unknown, which may limit suitability assessment.
• The update frequency changed from 5-year to annual cycles, which may affect temporal consistency.

Provenance

Source

Liangyun Liu, Chinese Academy of Sciences.

Collection Method

Developed by combining continuous change detection, local adaptive updating models, and a spatiotemporal optimization algorithm from dense time-series Landsat imagery.

Time Range

1985 to 2022.

Freshness

Updated annually after the year 2000.

Geography

Global.