WorldDEM DTMlite
Provides a worldwide, consistent, and high precision Digital Terrain Model (DTM) at 24m resolution in GeoTIFF format.
Description
A data block that provides access to a digital terrain model (DTM) derived from the WorldDEM product.
See this block on the marketplace.
This is a restricted block. To use this block, request access.
Technical information
Compatible blocks
- Advanced Water-Related Geohazards Predictor
- Co-Registration
- K-means Clustering
- Raster CRS Conversion
- Raster Tiling
- Raster Zonal Statistics
- Sharpening Filter
- Spectral Data Converter - RGB
- Temporal Change Detection
- Time Series Image Statistics
- Viewshed
Dataset description
WorldDEM DTMlite is a DTM that represents the surface of Earth after removing buildings, infrastructure and vegetation. For more information, please refer to the WorldDEM DTMlite Technical Product Specification.
Geographic coverage
The geographic coverage is global.
Dataset information
| Specifications | Description |
|---|---|
| Data provider | Airbus |
| Spatial resolution | 24 m |
| Image type | Radar |
| Acquisition mode | Bi-static InSAR StripMap mode |
| Geometric processing level | Correction of terrain artefacts, such as layover and shadow. Hydrological correction (editing of water bodies). Removal of surface features (vegetation, infrastructure, buildings). |
| Absolute vertical accuracy | 2.5 m (90% linear error) |
| Absolute horizontal accuracy | < 6 m (90% circular error) |
| Relative vertical accuracy | < 4 m (90% linear point-to-point error within an area of 1° x 1°) |
| Data acquisition period | 2011-2015 |
| Spectral band | X-band |
| File format | GeoTIFF |
| Bit depth per pixel | 32-bit |
| NoData value | -32767 |
| Vertical unit | meters |
| Coordinate system | Horizontal: WGS84/EPSG:4326 Vertical: EGM2008/EPSG:3855 |
| Can be reused in an UP42 workflow | No |
Limitations
The AOI must be larger than 0.1 km2.
How it works
| Supported JSON parameters | Default value | Min | Max | Examples |
|---|---|---|---|---|
bbox/intersects | null | 0.1 km2 | n.a. | Please check the examples from the JSON parameters. |
Examples
Example based on a workflow created with the data block WorldDEM DTMlite:
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Capabilities
Output
raster
| up42_standard | |
|---|---|
bands | [
"dtm"
] |
dtype | float |
format | GTiff |
resolution | 24 |
To know more please check the block capabilities specifications.