Australian National Gravity Compilation 2019: Ausdrape Elevation Grid

A 2019 Australian National Gravity Grids B series elevation grid with a cell size of approximately 435 meters. The grid records the observation surface height relative to the GRS80 ellipsoid, vertically continuing ground, airborne, and marine data to a smooth drape surface. The surface was generated with a minimum clearance of 250 meters and maximum climb/descent rates of 25 meters per kilometer, based on processed SRTM 3-second data.

Use Cases

• Modeling gravity field corrections based on the described drape surface elevation.
• Integrating terrain data for geophysical surveys based on the SRTM-derived ground surface.
• Processing airborne gravity data based on the specified surface clearance and climb rate parameters.

Strengths

• Grid cell size is specified as 0.00417 degrees (approximately 435m).
• Describes a specific processing method with a minimum surface clearance of 250 m and isotropic climb/descent rates of 25 m per km.
• Data integrates multiple sources: ground (SRTM), airborne, and marine-derived satellite altimetry.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic bias inherent to data_gov_au, focusing solely on Australia.

Provenance

Source

Australian Ocean Data Network

Collection Method

Processed from SRTM surface elevation 3 second grid data, with ground, airborne, and marine data vertically continued to a generated drape surface.

Time Range

2019

Freshness

Last updated 2026-06-05 06:30:39.562812; freshness should be verified.

Geography

Australia