National Gravity Compilation 2019: Australian Draped Elevation Geoid Grid

A 2019 geospatial grid providing a draped elevation surface for Australia with a cell size of approximately 435 meters. The data, processed for the Australian National Gravity Grids B series, vertically integrates ground, airborne, and marine satellite altimetry data onto a surface mimicking an airborne survey drape. It was created by the Australian Ocean Data Network and last updated in June 2026.

Use Cases

• Modeling regional gravity anomalies based on the integrated elevation and gravity data.
• Creating terrain-corrected geophysical maps based on the draped elevation surface.
• Supporting geological and resource exploration surveys based on the high-resolution gravity grid compilation.
• Calibrating airborne survey data based on the mimicked drape surface parameters.

Strengths

• Grid cell size is specified as 0.00417 degrees (approximately 435m).
• Integrates multiple data sources: ground (SRTM), airborne, and marine satellite altimetry.
• Surface generation parameters are defined, including a minimum clearance of 250m and maximum climb/descent rates of 25m per km.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and total dataset size are unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

Australian Ocean Data Network

Collection Method

Processed from SRTM surface elevation data and other sources, vertically continued to a generated drape surface.

Time Range

2019

Freshness

Last updated 2026-06-05 06:51:46.847718; freshness should be verified.

Geography

Australia