Fusion of Optical and InSAR DEMs: Improving the Quality of Free Data

dc.contributor.author Karkee, Manoj
dc.contributor.author Kusanagi, Michiro
dc.contributor.author Steward, Brian
dc.contributor.author Steward, Brian
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-02-13T03:36:16.000
dc.date.accessioned 2020-06-29T22:34:18Z
dc.date.available 2020-06-29T22:34:18Z
dc.date.copyright Sun Jan 01 00:00:00 UTC 2006
dc.date.embargo 2012-12-03
dc.date.issued 2006-07-01
dc.description.abstract <p>An approach to DEM fusion was developed to improve the overall accuracy of DEMs and applied to two public products: Shuttle Radar Topographic Mission (SRTM) DEM and Advanced Spaceborne Thermal Emission and Reflection (ASTER) DEM. The relative ASTER DEM was co-registered to the SRTM coordinates and converted to the near absolute DEM by shifting the histogram to the average elevation of the SRTM DEM. The voids in one DEM were then filled through interpolation using the slope and aspect from the other DEM and using the elevation of surrounding pixels. Finally, the higher frequency components of the Optical DEM and the lower frequency components of the InSAR DEMs were filtered out, as they are more erroneous respectively. The filtered DEMs were then combined to generate the fused DEM. This approach was tested in a 6000 ha test site with fairly complex topography located in the central region of Nepal. The fused DEM shows up to 45% improvement in the accuracy measures like standard deviation and range of the errors. The approach showed promise to improve DEM accuracy and completeness while maintaining the resolution to the best of the participating DEMs. This approach increases the reliability and applicability of free and commercial DEMs produced by Optical and SAR remote sensing technologies.</p>
dc.description.comments <p><a href="http://elibrary.asabe.org/abstract.asp?aid=20653&t=3&dabs=Y&redir=&redirType=" target="_blank">ASABE Paper No. 061172</a></p>
dc.identifier archive/lib.dr.iastate.edu/abe_eng_conf/43/
dc.identifier.articleid 1036
dc.identifier.contextkey 3507182
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_conf/43
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/460
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_conf/43/Steward_2006_FusionOpticalInSAR.pdf|||Sat Jan 15 00:14:27 UTC 2022
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.keywords DEMs
dc.subject.keywords Stereoscopy
dc.subject.keywords Interferometric SAR
dc.subject.keywords Data Fusion
dc.subject.keywords Spatial Frequency
dc.title Fusion of Optical and InSAR DEMs: Improving the Quality of Free Data
dc.type article
dc.type.genre conference
dspace.entity.type Publication
relation.isAuthorOfPublication ef71fa01-eb3e-4e29-ade7-bcb38f2968b0
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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