Derivation of Geodesic Flow Fields and Spectrum in Digital Topographic Basins
We present a framework to characterize terrestrial functions - surficial and bottom topographic regions that are represented, respectively, as raster digital elevation models (DEMs) and digital bathymetric models (DBMs) - through analysis of flow fields that are simulated via geodesic morphology. Ch...
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| Format: | Article |
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HINDAWI PUBLISHING CORPORATION
2008
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| Online Access: | http://shdl.mmu.edu.my/2889/ |
| _version_ | 1848790177384759296 |
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| author | Lim, Sin Liang Sagar, B. S. Daya |
| author_facet | Lim, Sin Liang Sagar, B. S. Daya |
| author_sort | Lim, Sin Liang |
| building | MMU Institutional Repository |
| collection | Online Access |
| description | We present a framework to characterize terrestrial functions - surficial and bottom topographic regions that are represented, respectively, as raster digital elevation models (DEMs) and digital bathymetric models (DBMs) - through analysis of flow fields that are simulated via geodesic morphology. Characterization of such functions is done via a new descriptor. Computation of this new descriptor involves the following steps: (i) basin in digital form representing topographic fluctuations as an input, (ii) threshold decomposition of basin - that consists of channelized and nonchannelized regions - into sets, (iii) proper indexing of these sets to decide the marker set (s) and its (their) corresponding mask set (s), (iv) performing geodesic propagation that provides basic flow field structures, and (v) finally providing a new basin descriptor - geodesic spectrum. We demonstrated this five-step framework on five different synthetic and/or realistic DEMs and/or DBMs. This study provides potentially invaluable insights to further study the travel-time flood propagation within basins of both fluvial and tidal systems. Copyright (C) 2008 S. L. Lim and B. S. D. Sagar. |
| first_indexed | 2025-11-14T18:08:28Z |
| format | Article |
| id | mmu-2889 |
| institution | Multimedia University |
| institution_category | Local University |
| last_indexed | 2025-11-14T18:08:28Z |
| publishDate | 2008 |
| publisher | HINDAWI PUBLISHING CORPORATION |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | mmu-28892011-09-21T07:24:18Z http://shdl.mmu.edu.my/2889/ Derivation of Geodesic Flow Fields and Spectrum in Digital Topographic Basins Lim, Sin Liang Sagar, B. S. Daya T Technology (General) QA75.5-76.95 Electronic computers. Computer science We present a framework to characterize terrestrial functions - surficial and bottom topographic regions that are represented, respectively, as raster digital elevation models (DEMs) and digital bathymetric models (DBMs) - through analysis of flow fields that are simulated via geodesic morphology. Characterization of such functions is done via a new descriptor. Computation of this new descriptor involves the following steps: (i) basin in digital form representing topographic fluctuations as an input, (ii) threshold decomposition of basin - that consists of channelized and nonchannelized regions - into sets, (iii) proper indexing of these sets to decide the marker set (s) and its (their) corresponding mask set (s), (iv) performing geodesic propagation that provides basic flow field structures, and (v) finally providing a new basin descriptor - geodesic spectrum. We demonstrated this five-step framework on five different synthetic and/or realistic DEMs and/or DBMs. This study provides potentially invaluable insights to further study the travel-time flood propagation within basins of both fluvial and tidal systems. Copyright (C) 2008 S. L. Lim and B. S. D. Sagar. HINDAWI PUBLISHING CORPORATION 2008 Article NonPeerReviewed Lim, Sin Liang and Sagar, B. S. Daya (2008) Derivation of Geodesic Flow Fields and Spectrum in Digital Topographic Basins. Discrete Dynamics in Nature and Society, 2008 (312870). p. 1. ISSN 1026-0226 http://dx.doi.org/10.1155/2008/312870 doi:10.1155/2008/312870 doi:10.1155/2008/312870 |
| spellingShingle | T Technology (General) QA75.5-76.95 Electronic computers. Computer science Lim, Sin Liang Sagar, B. S. Daya Derivation of Geodesic Flow Fields and Spectrum in Digital Topographic Basins |
| title | Derivation of Geodesic Flow Fields and Spectrum in Digital Topographic Basins |
| title_full | Derivation of Geodesic Flow Fields and Spectrum in Digital Topographic Basins |
| title_fullStr | Derivation of Geodesic Flow Fields and Spectrum in Digital Topographic Basins |
| title_full_unstemmed | Derivation of Geodesic Flow Fields and Spectrum in Digital Topographic Basins |
| title_short | Derivation of Geodesic Flow Fields and Spectrum in Digital Topographic Basins |
| title_sort | derivation of geodesic flow fields and spectrum in digital topographic basins |
| topic | T Technology (General) QA75.5-76.95 Electronic computers. Computer science |
| url | http://shdl.mmu.edu.my/2889/ http://shdl.mmu.edu.my/2889/ http://shdl.mmu.edu.my/2889/ |