WorldDEM4Ortho

WorldDEM4Ortho DSM layer in GeoTIFF format.


Description

A data block that provides access to a homogeneous and accurate digital elevation model (DEM) derived from the WorldDEM product.

See this block on the marketplace.

WorldDEM4Ortho
WorldDEM4Ortho

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

WorldDEM4Ortho is a homogeneous and accurate DEM optimized for the orthorectification of high resolution (HR) and very high resolution (VHR) optical and radar images. Based on the WorldDEM, the WorldDEM4Ortho is a hybrid product. Urban building areas as well as small objects (e.g. power pylons) and small groups of trees are levelled down to approximate bare ground. In these areas, the WorldDEM4Ortho is a digital terrain model (DTM) -like product. Vegetated areas including large forest areas and bare soil are represented as a digital surface model (DSM) with moderate smoothing. For more information, please refer to the the WorldDEM4Ortho Technical Product Specification

Geographic coverage

The geographic coverage is global.

Dataset information

SpecificationsDescription
Data providerAirbus
Spatial resolution24 m
Image typeRadar
Acquisition modeBi-static InSAR StripMap mode
Geometric processing levelCorrection of terrain artefacts, such as layover and shadow.
Hydrological correction (editing of water bodies).
DTM-DSM hybrid: removal of buildings, small infrastructure elements and small forest patches; moderate smoothing of vegetation and bare soil.
Absolute vertical accuracy2.5 m (90% linear error)
Absolute horizontal accuracy< 6 m (90% circular error)
Relative vertical accuracy< 2 m (slope ≤ 20% : 90% linear point-to-point error within an area of 1° x 1°)
< 4 m (slope ≥ 20% : 90% linear point-to-point error within an area of 1° x 1°)
Data acquisition period2011 to 2015
Spectral bandX-band
File formatGeoTIFF
Bit depth per pixel32-bit
NoData value-32767
Vertical unitmeters
Coordinate systemHorizontal: WGS84/EPSG:4326
Vertical: EGM2008/EPSG:3855
Can be reused in an UP42 workflowNo

Limitations

  1. The AOI size must be larger than 0.1 km2.
  2. Users who want to get access should register and go through a KYC compliance process.
  3. The access to this data block is currently not possible for users with UP42 individual accounts.

How it works

Supported JSON parametersDefault valueMinMaxExamples
bbox/intersectsnull0.1 km2n.a.Please check the examples from the JSON parameters.

Examples

Example based on a workflow created with the data block WorldDEM4Ortho:

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Capabilities

Output

To know more please check the block capabilities specifications.