This block provides access to a homogeneous and accurate digital elevation model (DEM) derived from the WorldDEM product.
|Advanced Water-Related Geohazards Predictor|
|Export Data (Raster)|
|Raster CRS Conversion|
|Raster Zonal Statistics|
|Spectral Data Converter - RGB|
|Temporal Change Detection|
|Time Series Image Statistics|
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
The geographic coverage is global.
|Spatial Resolution||24 m|
|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).
DTM-DSM hybrid: removal of buildings, small infrastructure elements and small forest patches; moderate smoothing of vegetation and bare soil.
|Absolute Vertical Accuracy||2.5 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 Period||2011-2015|
|Bit Depth||32 bits per pixel|
|Coordinate System||Horizontal: WGS84/EPSG 4326|
Vertical: EGM2008/EPSG 3855
|Can be reused in an UP42 workflow||No|
- The AOI size must be larger than 0.1 square kilometers.
- Users who want to get access should register and go through a KYC compliance process.
- The access to this data block is currently not possible for users with UP42 individual accounts.
|Supported JSON parameters||Default value||Min||Max||Examples|
|0.1 sq. km.||n.a.||Please check the examples from the JSON parameters.|
Example based on a workflow created with the data block WorldDEM4Ortho:
For more information, please read the block description from the marketplace.