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Improving National Land Cover Database estimates of road network impervious cover using vector road networks in GIS / K. Thomas in SaLIS Surveying and land information science, vol 68 n° 1 (March 2008)

Public [article]  inSaLIS Surveying and land information science > vol 68 n° 1 (March 2008) . - pp 21 - 27 Titre : Improving National Land Cover Database estimates of road network impervious cover using vector road networks in GIS Type de document : Article/Communication Auteurs : K. Thomas, Auteur ; T.A. Endreny, Auteur Année de publication : 2008 Article en page(s) : pp 21 - 27 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] ArcGIS [Termes IGN] base de données d'occupation du sol [Termes IGN] données vectorielles [Termes IGN] rastérisation [Termes IGN] réseau routier [Termes IGN] ruissellement [Termes IGN] surface imperméable Résumé : (Auteur) Polyline data are often adequate for qualitative representation of roadways for mapping and GIS yet they are often lacking when compared with surface coverages, such as raster data, for performing quantitative environmental simulation modeling where spatial representations are necessary. Widely used land cover raster data, such as the National Land Cover Database (NLCD), were however not collected with sufficient spatial resolution to allow adequate representation of small-scale features such as roadways. Using tools available in ArcGIS software, vector road files were obtained from the Accident Location Information System (ALIS) at the New York State Department of Transportation (NYSDOT) and converted to raster data to create spatially explicit representations of impervious area associated with roadways. Comparison of this new coverage with the NLCD results in an increase of approximately 3120 km2 of newly identified impervious coverage for New York State (NYS) not present in the NLCD, representing a 244 percent increase from the transportation class in the NLCD. Of the land cover that would be reclassified to roadway using this methodology, approximately 40 percent would be reclassified from forest land, 31 percent from agricultural land, and 28 percent from the residential land cover classifications. Copyright SaLIS Numéro de notice : A2008-266 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83663 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
121-08011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Maximizing spatial congruence of observed and DEM-delineated overland flow networks / T.A. Endreny in International journal of geographical information science IJGIS, vol 17 n° 7 (october 2003)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 17 n° 7 (october 2003) . - pp 699 - 713 Titre : Maximizing spatial congruence of observed and DEM-delineated overland flow networks Type de document : Article/Communication Auteurs : T.A. Endreny, Auteur ; E.F. Wood, Auteur Année de publication : 2003 Article en page(s) : pp 699 - 713 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] bassin hydrographique [Termes IGN] congruence [Termes IGN] modèle hydrographique [Termes IGN] modèle numérique de terrain Résumé : (Auteur) Model simulated overland flow is traditionally routed by the terrainbased algorithms that read 90 to 10-m pixel data, yet observed flow is often influenced by submeter micro-terrain features. While sub-meter terrain maps are not available for most watersheds, routing algorithms that bifurcate flow through multiple pixel boundaries may function to match observed runoff patterns. This paper assesses the spatial congruence between observed overland flow from two agricultural hillslopes in New Jersey with 30-m pixel flowpaths predicted by five common routing algorithms known as D8, Multiple Flow, 2D-Lea, (a building block in DEMON), 2D-Jensen, and D-Infinity. The lowest congruence ratings were assigned to D8, which constrained flow to a single neighbour, and MF, which bifurcated flow into all neighbours lower in elevation. 2D-Lea and D-Infinity, algorithms that bifurcated flow to a maximum of two neighbours, achieved the highest accuracy rankings. Simple algorithm modifications that increased D8 bifurcation, and constrained MF bifurcation, resulted in congruence rankings that rivaled the more sophisticated 2D-Lea, 2D-Jensen, and D-Infinity results. These experiments support the use of flow bifurcation schemes that pass flow into a maximum of between two and three pixels when routing polluted runoff. Numéro de notice : A2003-260 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/1365881031000135483 En ligne : https://doi.org/10.1080/1365881031000135483 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22555 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-03071	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-03072	RAB	Revue	Centre de documentation	En réserve L003	Disponible