National Gravity Compilation 2019: Australian Elevation Geoid Image

A 2019 digital elevation model for Australia, derived from processed SRTM surface elevation data. The grid has a cell size of 0.00417 degrees (approximately 435 meters) and data from ground, airborne, and marine sources were vertically continued to a drape surface with a 250-meter minimum clearance. The data are provided in units of meters by the Australian Ocean Data Network.

Use Cases

• Modeling terrain height variations based on the processed SRTM surface elevation data.
• Analyzing gravity anomalies using the 2019 Australian National Gravity Grids B series.
• Creating visualizations like hillshade maps from the elevation geoid image.
• Conducting vertical continuation of ground, airborne, and marine data to a common drape surface.

Strengths

• Grid cell size is specified as 0.00417 degrees (approximately 435m).
• Integrates multiple data sources: ground, airborne, and marine-derived from satellite altimetry.
• Drape surface is defined with specific parameters: 250m minimum clearance and 25m per km climb/descent rates.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

Australian Ocean Data Network

Collection Method

Processed from SRTM 3-second grid data and other sources, vertically continued to a defined drape surface.

Time Range

2019

Freshness

Last updated 2026-06-04 07:00:48.430767; freshness should be verified.

Geography

Australia