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Accurate area determination in the cadaster: case study of Slovenia / Sandi Berk in Cartography and Geographic Information Science, Vol 45 n° 1 (January 2018)  

Public [article]  inCartography and Geographic Information Science > Vol 45 n° 1 (January 2018) . - pp 1 - 17 Titre : Accurate area determination in the cadaster: case study of Slovenia Type de document : Article/Communication Auteurs : Sandi Berk, Auteur ; Miran Ferlan, Auteur Année de publication : 2018 Article en page(s) : pp 1 - 17 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cadastre étranger [Termes IGN] analyse comparative [Termes IGN] délimitation [Termes IGN] levé topographique [Termes IGN] lever cadastral [Termes IGN] parcelle cadastrale [Termes IGN] positionnement absolu [Termes IGN] Slovénie Résumé : (auteur) This paper discusses methodological problems of accurate area determination in the cadaster. The paper contrasts the ambiguous legal definition of the parcel boundary and parcel area in relation to the theoretically well-defined geodetic parcel boundary and the geodetic parcel area on the reference ellipsoid. To align with the real world, parcel area must account for terrain elevation. Various approximate methods for area determination which can be used in the cadaster are tested. A highly accurate method for parcel area computation is proposed, based on an equal-area projection. Considering the geodetic parcel area as a reference, the achievable accuracy of different methods is evaluated. For this analysis, the coordinates of the parcel boundary points are treated as error-free. Finally, the relevance of various systematic errors is discussed in relation to the statistical uncertainty of the parcel area, which could be gained by an a real-time kinematic GNSS survey. A case study is presented for the territory of Slovenia, its georeferencing rules, land demarcation pattern, and characteristics of its topography. Based on the results of this study, some general recommendations for the parcel area determination are given. Numéro de notice : A2018-002 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/15230406.2016.1217789 En ligne : https://doi.org/10.1080/15230406.2016.1217789 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=88378 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-2018011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Automated extraction of hydrographically corrected contours for the conterminous United States: the US Geological Survey US Topo product / Samantha T. Arundel in Cartography and Geographic Information Science, Vol 45 n° 1 (January 2018)  

Public [article]  inCartography and Geographic Information Science > Vol 45 n° 1 (January 2018) . - pp 31 - 55 Titre : Automated extraction of hydrographically corrected contours for the conterminous United States: the US Geological Survey US Topo product Type de document : Article/Communication Auteurs : Samantha T. Arundel, Auteur ; Philip T. Thiem, Auteur ; Eric W. Constance, Auteur Année de publication : 2018 Article en page(s) : pp 31 - 55 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] base de données topographiques [Termes IGN] carte topographique [Termes IGN] courbe de niveau [Termes IGN] détection de contours [Termes IGN] données localisées 3D [Termes IGN] Etats-Unis [Termes IGN] hydrographie [Termes IGN] modèle numérique de surface [Termes IGN] nivellement [Termes IGN] précision cartographique Résumé : (auteur) The US Topo is a new generation of digital topographic maps delivered by the US Geological Survey (USGS). These maps include contours in the traditional 7.5-min quadrangle format. The process for producing digital elevation contours has evolved over several years, but automated production of contours for the US Topo product began in 2010. This process, which is quite complex yet fairly elegant, automatically chooses the proper USGS quadrangle, captures the corresponding 1/3 as grid points from the national elevation data set (3D Elevation Program), and adjusts elevation data to better fit water features from the National Hydrography Dataset. After additional processing, such as identifying and tagging depressions, constructing proper contours across double-line streams, and omitting contours from water bodies, contours are automatically produced for the quadrangle. The resulting contours are then compared to the contours on the original (legacy) topographic map sheets, or to the 10-m contours from the original map sheets. Where the elevation surface used to generate the contours has been derived from the previously published contours for a quadrangle, the generated contours match the legacy contours quite well. Where newer elevation sources, such as lidar, originate the elevation surface, generated contours may vary significantly from the previous cartographically produced contours due to more accurate representations of the surface, and less reliance on cartographic interpretation. Numéro de notice : A2018-003 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/15230406.2016.1230027 En ligne : https://doi.org/10.1080/15230406.2016.1230027 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=88379 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-2018011	RAB	Revue	Centre de documentation	En réserve L003	Disponible