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TanDEM-X 30m DEM Change Maps (DCM) Quicklook
TanDEM-X 30m DEM Change Maps (DCM) Quicklook
The TanDEM-X DEM Change Maps are a project developed by the Institute Remote Sensing Technology (IMF) at the German Aerospace Center (DLR) within the activities of the TanDEM-X Mission. Between 2016 and 2022, the TanDEM-X mission acquired an additional complete coverage of the Earth's landmass to deliver a temporally independent coverage within a well-defined time span. These new acquisitions not only provide more up-to-date elevation information, but also a great dataset to show the changes that have occurred during the years separating this new coverage from the coverages acquired to generate the TanDEM-X global DEM (between 2011 and 2014). This product - the TanDEM-X DEM Change Maps - is available in 30m posting and show the changes between the edited first global TanDEM-X DEM (TanDEM-X 30m Edited DEM) and the newly acquired time-tagged DEM scenes. In order to keep a unique timestamp, two change maps are available per tile: one with the change to the oldest pixel in the new dataset - the first DEM change, and another with the change to the newest pixel of the new dataset - the last DEM change. The two maps differ only when there are multiple coverages. Users must be aware that a given elevation change measured in the DEM change maps corresponds to a topographic change with respect to TanDEM-X 30m EDEM, but cannot be associated with a corresponding physical height change of the same magnitude. This is due to the fact that the global TanDEM-X DEM reflects an averaged elevation derived from the combination of different images, acquired over a period of several years but also because the radar waves penetrates differently in the surface depending on the attributes of the land cover. This is especially important over vegetated and snow-covered regions.

Further Datasets from Datagroup TanDEM-X

The objective of the TanDEM-X mission (TerraSAR-X add-on for Digital Elevation Measurement) is to produce a highly accurate, three-dimensional image of our Earth with uniform quality and unprecedented accuracy.

Hydrosphere

TanDEM-X High-Resolution Coastline Quicklook

TanDEM-X High-Resolution Coastline

This global dataset outlines the boundary between terrestrial and marine environments.

Topography

TanDEM-X PolarDEM 90m of Antarctica Quicklook

TanDEM-X PolarDEM 90m of Antarctica

This is a gap-free and edited version of the TanDEM-X 90m DEM for Antarctica

Topography

TanDEM-X 90m DEM Quicklook

TanDEM-X 90m DEM

The global TanDEM-X 90m Digital Elevation Model has a reduced pixel spacing of 3 arcseconds.

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Further Datasets of Topic Topography

Topographic data data describing the shape and elevation of the Earth’s surface, such as terrain height, slope, and landforms.

Hydrosphere

HydroSHEDS quicklook

HydroSHEDS v2 - North/South America, 30m

HydroSHEDS v2 provides seamless, high-resolution data for mapping and analyzing freshwater systems.

Topography

SRTM X-SAR DEM Quicklook

SRTM X-SAR DEM

A digital elevation model at a spatial resolution of approximately 25x25 meters.