The Spatial Analysis Laboratories have a number of elevation datasets available for use in non-commercial teaching and research activities.
The following global datasets are ArcGIS-ready and can be used without any preprocessing:
- ETOPO2: This data provides grided (2 minute by 2 minute) elevation and bathymetry for the world. This data was derived from the National Geophysical Data Center (NGDC) ETOPO2 Global 2 foot Elevations dataset from September 2001.
- GTOPO30: This data provides grided 30 arc seconds (+- 1 km) elevation for the world. This data was developed by the USGS EROS Data Center in 1996 from a variety of data sources.
- SRTM Void Filled: Global Digital Elevation Model (SRTM) represents an elevation map from the NASA/NGA Shuttle Radar Topography Mission datasets, between 60 degrees North latitude and 56 degrees South latitude. The resolution is 3 arc seconds (90 meters) and the pixel values represent the elevation in meters. GTOPO30 data was used to fill in latitudes beyond 60 degrees North and 56 degrees South, as well as void areas within the SRTM data.
- World Topography and Bathymetry : This data provides an elevation and bathemetry image for the world with a shaded relief image incorporated as well. The topography data is derived from Global Elevation data; bathymetry data is derived from National Geophysical Data Center Marine Geology and Geophysics data (ETOPO5) and University of California, San Diego, Seafloor Topography, and major lakes from DCW.
We also have two national Australian elevation and bathymetry products from Geoscience Australia:
- SRTM-derived 1 Second Digital Elevation Models Version 1.0 : The 1 second Shuttle Radar Topography Mission (SRTM) Digital Elevation Models Version 1.0 package comprises three surface models: the Digital Elevation Model (DEM; ANZCW0103013355), the Smoothed Digital Elevation Model (DEM-S; ANZCW0703014016) and the Hydrologically Enforced Digital Elevation Model (DEM-H; ANZCW0703014615).
- Australian Bathymetry and Topography Grid : In 2005 Geoscience Australia and the National Oceans Office undertook a joint project to produce a consistent, high-quality 9 arc second (0.0025° or ~250m at the equator) bathymetric grid for Australian waters. In 2009 a number of new datasets were included in an updated version of the grid. Click here for more information about this data product.
LiDAR data provides the best resolution but is also the most difficult to gain access to and use. SAL has access to some LiDAR datasets, but must often seek permission from the data owner for each use of the data.