Randolph Glacier Inventory: Global Glacier Outlines

The Randolph Glacier Inventory (RGI) provides a global snapshot of glacier outlines, produced in coordination with the Global Land Ice Measurements from Space (GLIMS) initiative. This dataset, maintained by the International Association of Cryospheric Sciences (IACS), offers a single outline for each glacier, packaged globally and by region. It is updated approximately annually and is intended for estimating glacier volumes and regional-scale elevation changes rather than tracking individual glacier changes.

Use Cases

• Estimating regional glacier volumes and ice mass using hypsometric data (CSV files).
• Analyzing cryospheric responses to climatic forcing at a global scale using the geospatial outlines.
• Providing a baseline for glacier extent in hydrological or climate models using the Shapefile outlines.
• Studying elevation change rates by region using the gridded auxiliary data (GeoTIFFs).

Strengths

• Provides a globally consistent and standardized snapshot of glacier outlines, facilitating large-scale comparisons.
• Data is contributed by the international glaciological community and curated by the IACS Working Group, ensuring expert validation.
• Packaged both globally and by 19 regions based on the Global Terrestrial Network for Glaciers, allowing for focused regional analysis.

Limitations

• The dataset is a snapshot and is not suitable for measuring glacier-by-glacier rates of area change over time.
• There is a conflict in reported last update dates: one source states 2026-03-12, while another states 2010-12-31, creating uncertainty about data freshness.
• Specific column names, row counts, and total dataset size are not provided by any source, limiting detailed technical assessment.

Provenance

Source

International Association of Cryospheric Sciences (IACS) Working Group on the Randolph Glacier Inventory and Infrastructure for Glacier Monitoring.

Collection Method

Glacier mapping data contributed by the glaciological community to both GLIMS and RGI, compiled into a unified inventory.

Time Range

Snapshot; temporal coverage is not specified.

Freshness

2026-03-12 22:30:19.095208

Geography

Global, partitioned into regions based on the Global Terrestrial Network for Glaciers.