The 2019 Australian National Gravity Grids B series elevation surface is derived from processed SRTM 3-second grid data and other sources. The grid has a cell size of 0.00417 degrees (approximately 435 meters) and data are vertically continued to a drape surface with a minimum clearance of 250 meters. These data, provided in meters relative to the GRS80 ellipsoid, were produced by the Australian Ocean Data Network for project No. 202008.
Use Cases
- Modeling terrain effects on gravity measurements based on the described drape surface
- Analyzing elevation variations across Australia based on the SRTM-derived ground surface data
- Creating visualizations like hillshade images from the gridded elevation data
Strengths
- Grid cell size is specified as 0.00417 degrees (approximately 435 meters)
- The drape surface has defined parameters: minimum clearance of 250 m and isotropic maximum climb/descent rates of 25 m per km
- Data integrates multiple sources: ground (SRTM), airborne, and marine-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
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Processed from SRTM surface elevation 3-second grid data, airborne, and marine data vertically continued to a generated drape surface.
- Time Range
- 2019
- Freshness
- Last updated 2026-05-05 04:16:46.067516; freshness should be verified
- Geography
- Australia