A New Algorithm to Automatically Extract the Drainage Networks and Catchments Based on Triangulation Irregular Network Digital Elevation Model
A new algorithm to automatically extract drainage networks and catchments based on triangula- tion irregular networks （TINs） digital elevation model （DEM） was developed. The flow direction in this approach is determined by computing the spatial gradient of triangle and triangle edges. Outflow edge w...
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| Veröffentlicht in: | Shanghai jiao tong da xue xue bao 2014-06, Vol.19 (3), p.367-377 |
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| container_title | Shanghai jiao tong da xue xue bao |
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| creator | 屈国栋 苏丹阳 楼章华 |
| description | A new algorithm to automatically extract drainage networks and catchments based on triangula- tion irregular networks （TINs） digital elevation model （DEM） was developed. The flow direction in this approach is determined by computing the spatial gradient of triangle and triangle edges. Outflow edge was defined by comparing the contribution area that is separated by the steepest descent of the triangle. Local channels were then tracked to build drainage networks. Both triangle edges and facets were considered to con- struct flow path. The algorithm has been tested in the site for Hawaiian Island of Kaho＇olawe, and the results were compared with those calculated by ARCGIS as well as terrain map. The reported algorithm has been proved to be a reliable approach with high efficiency to generate well-connected and coherent drainage networks. |
| doi_str_mv | 10.1007/s12204-014-1511-9 |
| format | Article |
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The flow direction in this approach is determined by computing the spatial gradient of triangle and triangle edges. Outflow edge was defined by comparing the contribution area that is separated by the steepest descent of the triangle. Local channels were then tracked to build drainage networks. Both triangle edges and facets were considered to con- struct flow path. The algorithm has been tested in the site for Hawaiian Island of Kaho＇olawe, and the results were compared with those calculated by ARCGIS as well as terrain map. 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Shanghai Jiaotong Univ. (Sci.)</stitle><addtitle>Journal of Shanghai Jiaotong university</addtitle><date>2014-06-01</date><risdate>2014</risdate><volume>19</volume><issue>3</issue><spage>367</spage><epage>377</epage><pages>367-377</pages><issn>1007-1172</issn><eissn>1995-8188</eissn><abstract>A new algorithm to automatically extract drainage networks and catchments based on triangula- tion irregular networks （TINs） digital elevation model （DEM） was developed. The flow direction in this approach is determined by computing the spatial gradient of triangle and triangle edges. Outflow edge was defined by comparing the contribution area that is separated by the steepest descent of the triangle. Local channels were then tracked to build drainage networks. Both triangle edges and facets were considered to con- struct flow path. The algorithm has been tested in the site for Hawaiian Island of Kaho＇olawe, and the results were compared with those calculated by ARCGIS as well as terrain map. 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| fulltext | fulltext |
| identifier | ISSN: 1007-1172 |
| ispartof | Shanghai jiao tong da xue xue bao, 2014-06, Vol.19 (3), p.367-377 |
| issn | 1007-1172 1995-8188 |
| language | eng |
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| source | Alma/SFX Local Collection; SpringerLink Journals - AutoHoldings |
| subjects | Algorithms Architecture Catchments Computer Science Construction Digital Elevation Models Drainage Electrical Engineering Engineering Life Sciences Materials Science Networks Triangles Triangulation |
| title | A New Algorithm to Automatically Extract the Drainage Networks and Catchments Based on Triangulation Irregular Network Digital Elevation Model |
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