National Gravity Compilation 2019: Australian Elevation Surface for Gravity Grids

Australian terrain elevation data processed from SRTM 3-second grid data, vertically continued to a drape surface. The grid used to produce this image has a cell size of 0.00417 degrees, approximately 435 meters, and the surface mimics an airborne survey with a minimum clearance of 250 meters. These data were created by the Australian Ocean Data Network for project No. 202008 and last updated in June 2026.

Use Cases

• Modeling gravity anomalies based on the processed elevation surface relative to the GRS80 ellipsoid.
• Terrain analysis for geophysical surveys based on the described drape surface with specific climb/descent rates.
• Integrating ground, airborne, and marine elevation data for continental-scale studies based on the vertical continuation process.

Strengths

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

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Freshness should be verified; last updated date is 2026-06-04 07:44:03.124347.

Provenance

Source

Australian Ocean Data Network via data_gov_au.

Collection Method

Processed from SRTM 3-second grid surface elevation data, with all data vertically continued to a generated drape surface.

Time Range

Compilation referenced is 2019.

Freshness

Last updated 2026-06-04 07:44:03.124347.

Geography

Australia.