High-resolution WorldView-2 stereo satellite imagery and DEM (Sechomib – East, NW Namibia)

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Title:Main Title: High-resolution WorldView-2 stereo satellite imagery and DEM (Sechomib – East, NW Namibia)
Description:Abstract: This dataset contains an atmospherically corrected and orthorectified stereo pair of WorldView-2 panchromatic and multispectral satellite imagery from the eastern part of an alluvial fan in the Sechomib catchment in Northwest Namibia and a 1 m digital elevation model (DEM) derived from the stereo constellation. The imagery has been acquired on the 3rd of April 2019 and has a spatial resolution of 0.5 m and 2 m for the panchromatic and 8-band multispectral product, respectively. The spectral resolution covers an 11-bit range; however, the imagery is stored as 16-bit GeoTIFF raster. Due to the lack of vegetation and disturbing anthropogenic structures, the derived digital surface model can be considered a DEM. It is stored as a 32-bit real GeoTIFF. The satellite imagery and DEM are projected into WGS 1984 UTM Zone 33S (EPSG: 32733). Atmospheric correction, georeferencing, stereoscopic derivation of the digital surface model, and orthorectification was performed in Catalyst Professional Version 2222.0.1. For the correction of atmospheric effects neither haze nor cloud masking was performed since none of those conditions affect the specific satellite imagery. The atmospheric effects were modelled using a desert aerosol type and humidity conditions were optimized by checking the NIR-based MODIS Atmosphere L2 Water Vapor Product by Gao et al. (2015). Besides the Rational Polynomial Coefficients contained in the original imagery, 30 manual ground control points were collected for an optimized geometric correction, based on georeferenced high-resolution satellite imagery from the 28th December 2016 and 30th of January 2017 provided by CNES/Airbus. The total RMS errors amount to 0.82–0.83 m and 1.2 m for the panchromatic and multispectral imagery, respectively. The DEM was generated based on an epipolar pair created from both panchromatic images. Orthorectification of the satellite imagery is based on the 1 m stereo-DEM using a sampling interval of 1 and the nearest neighbour algorithm for resampling. The dataset is an accompanied by a documentation containing further details regarding the processing. Gao, B., et al., 2015. MODIS Atmosphere L2 Water Vapor Product. NASA MODIS Adaptive Processing System, Goddard Space Flight Center, USA: http://dx.doi.org/10.5067/MODIS/MOD05_L2.061
Citation Advice:DigitalGlobe Products. WorldView-2 satellite imagery © 2019 DigitalGlobe, Inc., a Maxar company.
Responsible Party
Creator:Janek Walk (Resource Provider)
Funding Reference:Deutsche Forschungsgemeinschaft (DFG): CRC 1211: Earth - Evolution at the Dry Limit
Publisher:CRC1211 Database (CRC1211DB)
Publication Year:2021
CRC1211 Topic:Remote Sensing
Related Subproject:C2
Subjects:Keywords: Satellite remote sensing, Geomorphology
Geogr. Information Topic:Imagery/Base Maps/Earth Cover
File Details
Data Type:Dataset - Satellite imagery
Size:1567377 Kilobytes
File Size:1.5 GB
Date:Available: 21.12.2021
Mime Type:application/zip
Data Format:GeoTIFF
Download Permission:Only Own Subproject
General Access and Use Conditions:This product is licensed satellite imagery for internal use only. According to the included Internal Use License, the Customer (members of C2) is not allowed to share the data and products not deemed to be Data Derivatives in any way. DigitalGlobe Products. WorldView-2 satellite imagery © 2019 DigitalGlobe, Inc., a Maxar company.
Access Limitations:DigitalGlobe Products. WorldView-2 satellite imagery © 2019 DigitalGlobe, Inc., a Maxar company.
Specific Information - Data
Temporal Extent:03.04.2019, 09:45:53 - 09:47:11
Subtype:Geospatial Data
Initiative Type:Mission
Metadata Details
Metadata Creator:Janek Walk
Metadata Created:21.12.2021
Metadata Last Updated:21.12.2021
Funding Phase:2
Metadata Language:English
Metadata Version:V50
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