The Global Urban Footprint® (GUF®) dataset is based on the radar (SAR) satellite imagery of the German satellites TerraSAR-X and TanDEM-X. By creating the GUF database, scientists at the German Remote Sensing Data Center (DFD) of the German Aerospace Center (DLR) have succeeded in using a newly developed method to generate a global raster map of the world’s built-up pattern in a so far unprecedented spatial resolution of about 12m per raster cell.

Using a fully automated processing system, a global coverage of more than 180,000 very high resolution SAR images (3m ground resolution) has been analyzed acquired between 2010 and 2013. Thereby, the backscatter amplitudes of the SAR data have been used in combination with derived textural information to delineate human settlements in a highly automated, complex decision-making process. The evaluation procedure based mainly on radar signals detects the characteristic vertical structures of human habitations – primarily built-up areas. In addition, auxiliary data such as digital elevation models have been included to improve the classification process. In total, over 20 million datasets were processed with a combined volume of about 320 terabytes. The final global maps show three coverage categories (e. g. in a B&W representation): Built-up areas (vertical structures only) in black, non-built-up surfaces in white, areas of no coverage by TSX/TDX satellites (NoData) as most parts of the oceans in grey.

The final product has been optimized for fast online access through web services by merging the 5° x 5° GUF tiles into a single global mosaic. Furthermore reduced resolution overviews have been generated with an interpolation algorithm, that computes the average value of all contribution pixels. The global mosaic uses PackBits compression to reduce file size.

(GUF® and Global Urban Footprint® are protected as trademarks.)

Date of last change
24-05-2017 06:37:44

The Global Urban Footprint® (GUF®) dataset is based on the radar (SAR) satellite imagery of the German satellites TerraSAR-X and TanDEM-X. Using a fully automated processing system, the so-called Urban Footprint Processor, a global coverage of more than 180,000 very high resolution SAR images (3m ground resolution) has been analyzed, mainly acquired between 2010 and 2013. Thereby, the backscatter amplitudes of the SAR data have been used in combination with derived textural information to delineate human settlements in a highly automated, complex decision-making process. In addition, auxiliary data such as digital elevation models have been included to improve the classification process. The data collection of satellite imagery was performed mainly between 2011 and 2012 (93 %), with single scenes with more recent acquisition dates (of 2013 / 2014) used to fill data gaps.
For more details see:
Esch, T., Marconcini, M., Felbier, A., Roth, A., Heldens, W., Huber, M., Schwinger, M., Taubenböck, H., Müller, A., Dech, S. (2013) Urban Footprint Processor – Fully Automated Processing Chain Generating Settlement Masks from Global Data of the TanDEM-X Mission. IEEE Geoscience and Remote Sensing Letters, Vol. 10, No. 6, November 2013. Pp. 1617-1621. ISSN 1545-598X, DOI 10.1109/LGRS.2013.2272953 (see: http://elib.dlr.de/83318/ )

This collection contains Sentinel-1 Level-2 Ocean (OCN) products for wind, wave and currents applications which may consist of the following geophysical components: Ocean Wind field (OWI), Ocean Swell spectra (OSW), and Surface Radial Velocity (RVL). The availability of components depends on the acquisition mode. Sentinel-1 is a polar-orbiting, all-weather, day-and-night C-band radar imaging mission funded by the European Union and carried out by the ESA within the Copernicus Programme, consisting of a constellation of two satellites.

Sensor: C-SAR (Synthetic Aperture Radar)
Repeat rate: 12 days (1 satellite), 6 days (2 satellites)
Launch date: 03 April 2014
Archiving start date: 12 April 2014
Mission Status: ongoing

Terms and conditions for the use of Sentinel data
https://scihub.copernicus.eu/twiki/pub/SciHubWebPortal/TermsConditions/T...

Sentinel-1 Mission Overview
https://sentinel.esa.int/web/sentinel/missions/sentinel-1

Sentinel-1 Level-2 OCN Products Overview
https://earth.esa.int/web/sentinel/technical-guides/sentinel-1-sar/produ...

Spatial resolution of Sentinel-1 Level-2 OCN data:
https://sentinels.copernicus.eu/web/sentinel/user-guides/sentinel-1-sar/...

File format of measurement data: netCDF
Suggested software: ESA SNAP/Sentinel Toolbox (http://step.esa.int/main/download/) Please note: Support for OCN-data is still limited.

Sentinel-1 acquisition plans:
https://sentinel.esa.int/web/sentinel/missions/sentinel-1/observation-sc...

Date of last change
27-04-2017 01:09:29

Sentinel-1 Level-2 Ocean (OCN) products consist of geo-located geophysical components derived from Level-1. OCN products are generated from all four Sentinel-1 imaging modes. From Stripmap (SM) and Wave (WV) modes, the OCN product will contain all three components. From Interferometric Wide Swath (IW) and Extra Wide Swath (EW) modes, the OCN product will only contain the OWI and RVL components.

This collection contains Sentinel-1 Level-1 Ground Range Detected (GRD) products which consist of focused SAR data that have been detected, multi-looked and projected to ground range using an Earth ellipsoid model. Sentinel-1 is a polar-orbiting, all-weather, day-and-night C-band radar imaging mission funded by the European Union and carried out by the ESA within the Copernicus Programme, consisting of a constellation of two satellites.

Sensor: C-SAR (Synthetic Aperture Radar)
Repeat rate: 12 days (1 satellite), 6 days (2 satellites)
Launch date: 03 April 2014
Archive start date: 12 April 2014
Mission Status: ongoing

Terms and conditions for the use of Sentinel data
https://scihub.copernicus.eu/twiki/pub/SciHubWebPortal/TermsConditions/T...

Sentinel-1 Mission Overview
https://sentinel.esa.int/web/sentinel/missions/sentinel-1

Sentinel-1 Level-1 GRD Products Overview
https://earth.esa.int/web/sentinel/technical-guides/sentinel-1-sar/produ...

Spatial resolution of Sentinel-1 Level-1 GRD data
https://sentinels.copernicus.eu/web/sentinel/user-guides/sentinel-1-sar/...

File format of measurement data: GeoTIFF
Suggested software: ESA SNAP/Sentinel Toolbox http://step.esa.int/main/download/

Sentinel-1 acquisition plans:
https://sentinel.esa.int/web/sentinel/missions/sentinel-1/observation-sc...

Date of last change
27-04-2017 01:09:29

Sentinel-1 Level-1 Ground Range Detected (GRD) products consist of focused SAR data that has been detected, multi-looked and projected to ground range using an Earth ellipsoid model.

This collection contains Sentinel-1 Level-1 Single Look Complex (SLC) products which consist of focused SAR data that are geo-referenced using orbit and attitude data from the satellite, and provided in slant-range geometry. Sentinel-1 is a polar-orbiting, all-weather, day-and-night C-band radar imaging mission funded by the European Union and carried out by the ESA within the Copernicus Programme, consisting of a constellation of two satellites.

Sensor: C-SAR (Synthetic Aperture Radar)
Repeat rate: 12 days (1 satellite), 6 days (2 satellites)
Launch date: 03 April 2014
Archiving start date: 12 April 2014
Mission Status: ongoing

Terms and conditions for the use of Sentinel data
https://scihub.copernicus.eu/twiki/pub/SciHubWebPortal/TermsConditions/T...

Sentinel-1 Mission Overview
https://sentinel.esa.int/web/sentinel/missions/sentinel-1

Sentinel-1 Level-1 SLC Products Overview
https://earth.esa.int/web/sentinel/technical-guides/sentinel-1-sar/produ...

Spatial resolution of Sentinel-1 Level-1 SLC data
https://sentinels.copernicus.eu/web/sentinel/user-guides/sentinel-1-sar/...

File format of measurement data: GeoTIFF
Suggested software: ESA SNAP/Sentinel Toolbox (http://step.esa.int/main/download/)

Sentinel-1 acquisition plans:
https://sentinel.esa.int/web/sentinel/missions/sentinel-1/observation-sc...

Date of last change
27-04-2017 01:09:29

The Sentinel-1 Level-1 SLC products include a single look in each dimension using the full available signal bandwidth and complex samples (real and imaginary) preserving the phase information. The products have been geo-referenced using the orbit and attitude data from the satellite and have been corrected for azimuth bi-static delay, elevation antenna pattern and range spreading loss.

This collection contains Sentinel-2 Level-1C products which consist of top-of-atmosphere reflectances in cartographic geometry. Sentinel-2 is a wide-swath, high-resolution, multi-spectral imaging mission developed by ESA as part of the Copernicus Programme, supporting the Copernicus Land Monitoring services, including the monitoring of vegetation, soil and water cover, as well as the observation of inland waterways and coastal areas. The full Sentinel-2 mission comprises two polar-orbiting satellites in the same orbit, phased at 180° to each other.

Sensor: MSI (Multispectral Instrument)
Repeat rate: 10 days
Launch date: 23 June 2015
Archiving start date: 27 June 2015
Mission Status: ongoing

Terms and conditions for the use of Sentinel data
https://scihub.copernicus.eu/twiki/pub/SciHubWebPortal/TermsConditions/T...

Sentinel-2 Mission Overview
https://sentinel.esa.int/web/sentinel/missions/sentinel-2

Sentinel-2 Level-1C Processing Overview
https://earth.esa.int/web/sentinel/technical-guides/sentinel-2-msi/level...

Sentinel-2 Level-1C spatial resolution
https://sentinels.copernicus.eu/web/sentinel/user-guides/sentinel-2-msi/...

Sentinel-2 Level-1C radiometric resolution and band numbering
https://sentinels.copernicus.eu/web/sentinel/user-guides/sentinel-2-msi/...

File format of measurement data: JPEG2000
Suggested software: ESA SNAP/Sentinel Toolbox (http://step.esa.int/main/download/)

Sentinel-2 acquisition plans:
https://sentinels.copernicus.eu/web/sentinel/missions/sentinel-2/acquisi...

Date of last change
27-04-2017 01:09:29

The processing of Sentinel-2 Level-1C products is based on the Level-1B product and includes radiometric and geometric corrections including orthorectification and spatial registration on a global reference system with sub-pixel accuracy. The quality of generated products is assessed by the On Line Quality Control (OLQC) functionality. The OLQC performs essential quality checks on each product generated by the processing chain. The results of the quality checks are presented as XML reports and GML quality masks.