For three years, Airbus’ twin high-resolution radar satellites, TerraSar-X and TanDEM-X, imaged the entire land surface of our planet multiple times to create the first ever global 12-meter (m) elevation model. Referred to as WorldDEMTM, this data is ideal for all mapping projects requiring accurate elevation models including orthorectification, floodplain determination, mineral exploration and hydrocarbon development.
WorldDEM June 2015 Product Updates
A coverage map of the one-degree cells that are currently available for delivery. Areas that are available will take a minimum of 10 days to deliver.
We are very excited to announce that sales of the bare earth version of WorldDEM, referred to as WorldDEM DTM, have commenced! Any area that is ready to order can now be produced in all three WorldDEM formats – see below for more technical details on these formats.
During June, sections of Russia and Southeast Asia were made available. WorldDEM areas that are available to order take a minimum of 10 days to deliver.
To date, there is more than 113,184,000 square kilometers (sq km) of WorldDEM data that is available! And some 2,507,000 sq km of WorldDEM was made available for delivery in the past month alone.
WorldDEM Specifications
The key product specifications of Airbus’ WorldDEM are as follows:
- Resolution: 12-m
- Coverage: entire landmass of the Earth, ~150 million square kilometers (sq km)
- Absolute Vertical Accuracy: < 4-m Linear Error 90% (LE90)
- Relative Vertical Accuracy: < 2-m LE90 (slopes ≤ 20%), < 4-m LE90 (slopes > 20%)
- Absolute Horizontal Accuracy: < 10-m Circular Error 90% (CE90)
- Vintage: all data collected within 3 years
- Source: interferometry from synthetic aperture radar (SAR) satellites TerraSAR-X & TanDEM-X
- Minimum Order: 500 sq km per polygon
- File Format: GeoTIFF
- Projection: geographic WGS84 (EGM2008, vertical datum), meter vertical unit
- Product Line Options:
- WorldDEMcore – unedited digital surface model (DSM), includes spikes, wells and voids
- WorldDEM – a DSM with removal of artifacts and water body flattening
- WorldDEM DTM – artifacts and surface features removed, i.e. a digital terrain model (DTM)
WorldDEM Coverage and Pricing
WorldDEM data has a 500 sq km minimum order size with a 10-km width requirement. Prices for two of the product lines have been set:
- WorldDEMcore – $10.80 per sq km
- WorldDEM – $13.50 per sq km
- WorldDEM DTM – $27 per sq km
WorldDEM Samples
A comparison of 30-m SRTM and 12-m WorldDEM elevation data over Arkansas, USA.
You can download four 12-m WorldDEM samples here, including one of the WorldDEM DTM product:
- Rapid City, South Dakota, USA – moderate to hilly terrain; elevations from 927 m to 1,765 m provided in two formats, WorldDEM and WorldDEM DTM
- Wagga Wagga, Australia – forest and urban with many water bodies; 137 m to 922 m provided in two formats, WorldDEMcore and WorldDEM
For more information about 12-m WorldDEM data, please send us an email at sales@apollomapping.com or check our website here.
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