Abstract:
TanDEM-X (TerraSAR-X add-on for Digital Elevation Measurements) is an Earth observation radar mission that consists of a SAR interferometer built by two almost identical satellites flying in close formation. With a typical separation between the satellites of 120 m to 500 m a global Digital Elevation Model (DEM) has been generated.
The TanDEM-X 30m EDEM is a product variant of the global Digital Elevation Model (DEM) acquired in the frame of the German TanDEM-X mission between 2010 and 2014, and has a reduced pixel spacing of 1 arcseconds (arsec), which corresponds to 30m at the equator. An automated edition was developed by the Microwaves and Radar Institute at the German Aerospace Center (DLR) to have a full and clean coverage of all Earth’s landmasses from pole to pole.
- TDM30 Edited Digital Elevation Model (EDEM): The EDEM elevation values, derived from the TanDEM-X mission and edited in order to remove voids and to flatten water, are given in ellipsoidal heights relative to the WGS84 and EGM08. Here the EGM08 vertical datum displayed with colors.
- TDM30 Hill Shade Display (HSD): The hill shade display is a color-coded 3D representation of the terrain surface, with the sun's relative position taken into account for shading the image.
- TDM30 Editing Mask (EDM): The EDM is color-coded and shows where the DEM has been modified in order to fill gaps and flatten the water areas. The value for each pixel in the editing mask identifies a combination of the used edition algorithm and the external reference DEM, in the case of gaps filled with an external reference DEM.
- TDM30 Height Error Map (HEM): The HEM is associated to the pure InSAR derived DEM height combination and shows estimated height error standard deviation for unedited DEM areas. Here displayed with colors.
- TDM30 Land Cover Map (LCM): The LCM is color-coded and shows pixel-wise land cover classification. The first band includes 3 LC classes: forest, land and water. In the second band, information about the reliability of the water LC class is provided, associated to permanent water and temporary water. Only the first band is displayed.
- TDM30 Hill Shade Combined (HSC): Black and white hill shade combining slope and oblique shading. Is not part from the downloadable product and displayed only for mapping purposes, standalone or in combination with the colored EDEM.
- TDM30 Hill Shade Multidirectional (HSM): Black and white hill shade combining illuminated from 225 deg, 270 deg, 315 deg, and 360 deg azimuth. Is not part from the downloadable product and displayed only for mapping purposes, standalone or in combination with the colored EDEM.
Product Information:
- Product Name: TanDEM-X 30m Edited Digital Elevation Model (EDEM)
- Release: 2023-11-15
- Contact: TanDEM-X Science Team
Data Information:
Data Access:
References:
- C. González, M. Bachmann, J.L. Bueso-Bello, P. Rizzoli, M. Zink. A Fully Automatic Algorithm for Editing the TanDEM-X Global DEM. Remote Sensing. 2020; 12(23):3961. doi: 10.3390/rs12233961
- J.L. Bueso-Bello, M. Martone, C. González, F. Sica, P. Valdo, P. Posovszky, A. Pulella, P. Rizzoli. The Global Water Body Layer from TanDEM-X Interferometric SAR Data. Remote Sensing. 2021; 13 (24):5069. doi: 10.3390/rs13245069
- M. Martone, P. Rizzoli, C. Wecklich, C. González, J.L. Bueso-Bello, P. Valdo, D. Schulze, M. Zink, G. Krieger, A. Moreira. The global forest/non-forest map from TanDEM-X interferometric SAR data. Remote Sensing of Environment. 2018; 205 : 352-373.
DLR © 2023
Keywords:
DLR, TDM, HR, TanDEM-X, DEM, EDEM, Digital Elevation Model, TDM30, Edited DEM
Map Projection:
Bounds: -180.00, -90.00, 180.00, 90.00