Data

Orthorectification of WorldView-2 satellite imagery, of the Cape Poinsett area, Budd Coast, Antarctica, captured 2 November 2013

Australian Antarctic Division
Bender, A. and Brolsma, H. ; BENDER, ANGELA ; BROLSMA, HENK
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=http://data.aad.gov.au/metadata/cape_poinsett_worldview_2nov2013&rft.title=Orthorectification of WorldView-2 satellite imagery, of the Cape Poinsett area, Budd Coast, Antarctica, captured 2 November 2013&rft.identifier=http://data.aad.gov.au/metadata/cape_poinsett_worldview_2nov2013&rft.publisher=Australian Antarctic Data Centre&rft.description=The Australian Antarctic Data Centre (AADC) has WorldView-2 satellite imagery, of the Cape Poinsett area, Budd Coast, Antarctica, captured 2 November 2013.The panchromatic and multispectral bands were orthorectified using the RPC data files. The orthorectified image files are called WV_2Nov2013_pan_orc and WV_2Nov2013_ms_orc. These two images were then pansharpened using Gram-Schmidt spectral sharpening, the resulting image is called WV_2Nov2013_ps_orc.The processing was done by Angela Bender of the AADC using IDL/ENVI version 4.8.WorldView-2 geometric accuracy specification is 6.5 m CE90, with predicted performance in the range of 4.6 to 10.7 m (15 to 35 feet) CE90.Given that there were no accurate ground control points or digital elevation models available within the image area it was decided that the orthorectification be carried out using the fast mode orthorectification process which derives a model from the RPC co-efficients.Rational polynomial coefficients (RPCs) model the ground-to-image relationship as a third-order, rational, ground-to-image polynomial. The RPC orthorectification process works on a pixel-by-pixel basis to provide correct ground locations, so it can take a significant amount of processing time. An alternative method to the standard RPC orthorectification is a fast mode orthorectification. This method works by sacrificing accuracy for speed, since processing time is much faster but the results are slightly less accurate. Instead of solving the RPC equation for each pixel, the fast mode orthorectification solves for a grid of points spaced throughout the image and triangulates a warp between the points.This approach assumes that the geometric accuracy of the WorldView-2 image based on its RPC and attitude information is more accurate than a polynomial correction based on inaccurate ground control points. In this orthorectification approach the image is assumed to be in the correct location (at sea level) and topographic relief distortions are not removed.Progress Code: completed&rft.creator=Bender, A. and Brolsma, H. &rft.creator=BENDER, ANGELA &rft.creator=BROLSMA, HENK &rft.date=2013&rft.coverage=westlimit=112.974; southlimit=-65.866; eastlimit=113.255; northlimit=-65.765&rft.coverage=westlimit=112.974; southlimit=-65.866; eastlimit=113.255; northlimit=-65.765&rft_rights= The distribution of WorldView-2 and other DigitalGlobe imagery held by the Australian Antarctic Data Centre (AADC) is restricted due to copyright. The imagery may only be provided to: 1 Australian Antarctic Division staff; or 2 Those involved in a joint project with the Australian Antarctic Division for which a written agreement exists. Please contact the AADC for access to the imagery. &rft_rights=Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/legalcode&rft_rights= This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=cape_poinsett_worldview_2nov2013 when using these data. &rft_rights=This metadata record is publicly available.&rft_subject=imageryBaseMapsEarthCover&rft_subject=EARTH SCIENCE > SPECTRAL/ENGINEERING > INFRARED WAVELENGTHS > INFRARED IMAGERY&rft_subject=EARTH SCIENCE > SPECTRAL/ENGINEERING > VISIBLE WAVELENGTHS > VISIBLE IMAGERY&rft_subject=Satellite Image&rft_subject=Digital Globe&rft_subject=SATELLITES&rft_subject=WORLDVIEW-2&rft_subject=AMD&rft_subject=AMD/AU&rft_subject=CEOS&rft_subject=CONTINENT > ANTARCTICA&rft_subject=OCEAN > SOUTHERN OCEAN&rft_subject=GEOGRAPHIC REGION > POLAR&rft.type=dataset&rft.language=English Access the data
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CC-BY

Attribution 4.0 International (CC BY 4.0)
https://creativecommons.org/licenses/by/4.0/legalcode


The distribution of WorldView-2 and other DigitalGlobe imagery held by the Australian Antarctic Data Centre (AADC) is restricted due to copyright.
The imagery may only be provided to:
1 Australian Antarctic Division staff; or
2 Those involved in a joint project with the Australian Antarctic Division for which a written agreement exists.

Please contact the AADC for access to the imagery.


This data set conforms to the CCBY Attribution License
(http://creativecommons.org/licenses/by/4.0/).

Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=cape_poinsett_worldview_2nov2013 when using these data.

This metadata record is publicly available.

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Full description

The Australian Antarctic Data Centre (AADC) has WorldView-2 satellite imagery, of the Cape Poinsett area, Budd Coast, Antarctica, captured 2 November 2013.

The panchromatic and multispectral bands were orthorectified using the RPC data files. The orthorectified image files are called WV_2Nov2013_pan_orc and WV_2Nov2013_ms_orc. These two images were then pansharpened using Gram-Schmidt spectral sharpening, the resulting image is called WV_2Nov2013_ps_orc.

The processing was done by Angela Bender of the AADC using IDL/ENVI version 4.8.

WorldView-2 geometric accuracy specification is 6.5 m CE90, with predicted performance in the range of 4.6 to 10.7 m (15 to 35 feet) CE90.

Given that there were no accurate ground control points or digital elevation models available within the image area it was decided that the orthorectification be carried out using the fast mode orthorectification process which derives a model from the RPC co-efficients.

Rational polynomial coefficients (RPCs) model the ground-to-image relationship as a third-order, rational, ground-to-image polynomial. The RPC orthorectification process works on a pixel-by-pixel basis to provide correct ground locations, so it can take a significant amount of processing time. An alternative method to the standard RPC orthorectification is a "fast mode" orthorectification. This method works by sacrificing accuracy for speed, since processing time is much faster but the results are slightly less accurate. Instead of solving the RPC equation for each pixel, the fast mode orthorectification solves for a grid of points spaced throughout the image and triangulates a warp between the points.

This approach assumes that the geometric accuracy of the WorldView-2 image based on its RPC and attitude information is more accurate than a polynomial correction based on inaccurate ground control points. In this orthorectification approach the image is assumed to be in the correct location (at sea level) and topographic relief distortions are not removed.

Lineage

Progress Code: completed

Data time period: 2013-11-02 to 2013-11-02

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113.255,-65.765 113.255,-65.866 112.974,-65.866 112.974,-65.765 113.255,-65.765

113.1145,-65.8155

text: westlimit=112.974; southlimit=-65.866; eastlimit=113.255; northlimit=-65.765

Subjects
AMD | AMD/AU | CEOS | CONTINENT > ANTARCTICA | Digital Globe | EARTH SCIENCE > SPECTRAL/ENGINEERING > INFRARED WAVELENGTHS > INFRARED IMAGERY | EARTH SCIENCE > SPECTRAL/ENGINEERING > VISIBLE WAVELENGTHS > VISIBLE IMAGERY | GEOGRAPHIC REGION > POLAR | OCEAN > SOUTHERN OCEAN | SATELLITES | Satellite Image | WORLDVIEW-2 | imageryBaseMapsEarthCover |

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Other Information
The Australian Antarctic Data Centre's Satellite Image Catalogue. (VIEW RELATED INFORMATION)

uri : http://data.aad.gov.au/aadc/satellite/

Citation reference for this metadata record and dataset (VIEW RELATED INFORMATION)

uri : http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=cape_poinsett_worldview_2nov2013

Identifiers
  • global : cape_poinsett_worldview_2nov2013