The following TanDEM-X Information Layers are included in the map:
- DEM Change Map (DCM): main layer, it gives the DEM difference (new dataset mosaic minus TanDEM-X 30m Edited DEM) in meters.
- The acquisition date layer (DATE) gives the acquisition date of the used scene for each pixel. The date is given in integer format YYYYMMDD.
- The Height Accuracy Indication (HAI) represents for each pixel the combination of the Height Error Map values (HEM) of the new DEM data mosaic and the TanDEM-X 30m EDEM under the approximation of Gaussian distributions.
- The Change Indication Mask (CIM) indicates where the DCM processor found changes between the new dataset mosaic and the TanDEM-X 30m EDEM. It provides information on possible terrain changes and their reliability based on the local properties of the TanDEM-X 30m EDEM, the new dataset and the HAI but does not replace a thorough temporal height change analysis.
- Note: For deeper analysis of the DCM, it is recommended to also download the TanDEM-X 30m EDEM.
M. Lachaise, C. González, P. Rizzoli, B. Schweiβhelm and M. Zink (2022): The New Tandem-X DEM Change Maps Product, IEEE International Geoscience and Remote Sensing Symposium, Kuala Lumpur, Malaysia, 2022, pp. 5432-5435.
Show PublicationTD-GS-PS-0216 TanDEM-X 30m DEM Change Maps Product Description, M. Lachaise, B. Schweißhelm., Oct 2023 1.0
Show PublicationEOC Catalogue
OGC CSW server part of the EOC Geoservice
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TanDEM-X - DEM Change Maps (DCM) - Global, 30m
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EOC TanDEM-X Map Service
This Web Mapping Service provides access to geospatial TanDEM-X map products within the Earth Observation Center (EOC).
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Layers
The DEM Change Maps (DCM) values represent the change in meter between the new acquisitions from 2016 til 2022 and the edited TanDEM-X DEM. There are two DCMs, one for the earliest change and on for the latest change. When only one new acquisition is available, the earliest and the latest change layers are equal.
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The DEM Change Maps (DCM) values represent the change in meter between the new acquisitions from 2016 til 2022 and the edited TanDEM-X DEM. There are two DCMs, one for the earliest change and on for the latest change. When only one new acquisition is available, the earliest and the latest change layers are equal.
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The DATE layers give the acquisition dates for every pixel.
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The DATE layers give the acquisition dates for every pixel.
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The Change Indication Masks (CIM) provide an indication about the reliability of the Change depicted in the DCMs.
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The Change Indication Masks (CIM) provide an indication about the reliability of the Change depicted in the DCMs.
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The Height Accuracy Indication (HAI) values are an approximation of the Height Errors of the DCMs under the assumptions that the errors are normally distributed
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The Height Accuracy Indication (HAI) values are an approximation of the Height Errors of the DCMs under the assumptions that the errors are normally distributed
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EOC TanDEM-X Map Service
This Web Mapping Service provides access to geospatial TanDEM-X map products within the Earth Observation Center (EOC).
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Layers
The DEM Change Maps (DCM) values represent the change in meter between the new acquisitions from 2016 til 2022 and the edited TanDEM-X DEM. There are two DCMs, one for the earliest change and on for the latest change. When only one new acquisition is available, the earliest and the latest change layers are equal.
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The DEM Change Maps (DCM) values represent the change in meter between the new acquisitions from 2016 til 2022 and the edited TanDEM-X DEM. There are two DCMs, one for the earliest change and on for the latest change. When only one new acquisition is available, the earliest and the latest change layers are equal.
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The DATE layers give the acquisition dates for every pixel.
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The DATE layers give the acquisition dates for every pixel.
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The Change Indication Masks (CIM) provide an indication about the reliability of the Change depicted in the DCMs.
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The Change Indication Masks (CIM) provide an indication about the reliability of the Change depicted in the DCMs.
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The Height Accuracy Indication (HAI) values are an approximation of the Height Errors of the DCMs under the assumptions that the errors are normally distributed
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The Height Accuracy Indication (HAI) values are an approximation of the Height Errors of the DCMs under the assumptions that the errors are normally distributed
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EOC Tile Cache
The EOC Tile Cache supports multiple cache protocols to access different datasets originated from DLR's Earth Observation Center (EOC).
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Layers
DCM30 DEM Change Maps (DCM) - First change 16-22
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DCM30 DEM Change Maps (DCM) - Last change 16-22
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DCM30 Date (DATE) - First change 16-22
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DCM30 Date (DATE) - Last change 16-22
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DCM30 Change Indication Mask (CIM) - First change 16-22
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DCM30 Change Indication Mask (CIM) - Last change 16-22
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DCM30 Height Accuracy Indication (HAI) - First change 16-22
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DCM30 Height Accuracy Indication (HAI) - Last change 16-22
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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.
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.
