TanDEM-X - Digital Elevation Model (DEM) - Global, 12m

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 120m to 500m a global Digital Elevation Model (DEM) has been generated.

The main objective of the TanDEM-X mission is to create a precise 3D map of the Earth's land surfaces that is homogeneous in quality and unprecedented in accuracy. The data acquisition was completed in 2015 and production of the global DEM was completed in September 2016. The absolute height error is with about 1m an order of magnitude below the 10m requirement.

The TanDEM-X 12m DEM is the nominal product variant of the global Digital Elevation Model (DEM) acquired in the frame of the German TanDEM-X mission between 2010 and 2015 with a spatial resolution of 0.4 arcseconds (12m at the equator). It covers all Earth’s landmasses from pole to pole.

For more information concerning the TanDEM-X mission, the reader is referred to: https://www.dlr.de/dlr/en/desktopdefault.aspx/tabid-10378/

Citation proposal
. TanDEM-X - Digital Elevation Model (DEM) - Global, 12m. https://gdk.gdi-de.org/geonetwork/srv/api/records/5eecdf4c-de57-4624-99e9-60086b032aea

INSPIRE
SDS

INSPIRE

Identification

File identifier: 5eecdf4c-de57-4624-99e9-60086b032aea XML

Hierarchy level: Dataset

Online resource

Protocol: WWW:LINK-1.0-http--link

Protocol: WWW:LINK-1.0-http--link

Protocol: WWW:LINK-1.0-http--link

Resource identifier

code: https://geoservice.dlr.de/catalogue/srv/metadata/5eecdf4c-de57-4624-99e9-60086b032aea

Metadata language: English

Spatial representation type: Grid

Encoding

Projection

Classification of data and services

Topic category

Elevation

Classification of data and services

Coupled resource

Classification of data and services

Coupled resource

Keywords

GEMET - INSPIRE themes, version 1.0 ( Theme )

Elevation

Spatial scope

Global

Other keywords

Keywords

TanDEM-X
Digital Elevation Model
TDX-1
TSX-1
SAR
X-Band
TDM-DEM-12m
urn:eop:DLR:EOWEB:TDM-DEM-12m
Global
FEDEO

Geographic coverage

Temporal reference

Temporal extent

Date ( Creation ): 2018-11-27T10:00:00

Quality and validity

Lineage

For operational TanDEM-X acquisitions single DEM scenes with an extend of ~30km x 50km are generated by applying bistatic focusing, processing of individual interferograms, subsequent phase unwrapping and geocoding.

Remaining offsets and tilts in these DEM scenes are compensated in a DEM calibration step. Therefore, globally available ICESat (Ice, Cloud and Land Elevation Satellite) data is used as ground control points. Corrections are estimated in a block adjustment approach. The corrected DEM scenes are mosaicked to final DEM tiles. Manually conducted quality analysis is performed for every individual DEM tile.

For more information concerning TanDEM-X DEM product the reader is referred to

https://geoservice.dlr.de/web/dataguide/tdm90/pdfs/TD-GS-PS-0021_DEM-Product-Specification.pdf

Note:

Latitude pixel spacing:

• 0.4 arc-seconds

Longitude pixel spacing:

• 0° – 50° North/South: 0.4 arc-seconds

• 50° – 60° North/South 0.6 arc-seconds

• 60° – 70° North/South 0.8 arc-seconds

• 70° – 80° North/South 1.2 arc-seconds

• 80° – 85° North/South 2.0 arc-seconds

• 85° – 90° North/South 4.0 arc-seconds