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Interpretive tools for 3D structural geological modelling, part 2: surface design from sparse spatial data / K.B. Sprague in Geoinformatica, vol 9 n° 1 (March - May 2005)  

Public [article]  inGeoinformatica > vol 9 n° 1 (March - May 2005) . - pp 5 - 32 Titre : Interpretive tools for 3D structural geological modelling, part 2: surface design from sparse spatial data Type de document : Article/Communication Auteurs : K.B. Sprague, Auteur ; E.A. DE Kemp, Auteur Année de publication : 2005 Article en page(s) : pp 5 - 32 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] Arctique, océan [Termes IGN] Canada [Termes IGN] courbe de Bézier [Termes IGN] données clairsemées [Termes IGN] extrapolation [Termes IGN] géologie locale [Termes IGN] interprétation automatique [Termes IGN] mine [Termes IGN] modèle géologique [Termes IGN] modélisation 3D [Termes IGN] modélisation géologique volumique (MGV) Résumé : (Auteur) We present software tools and methods applicable to the geological modelling of sparse spatial and structural data within a 3-D digital environment. Free-form surfaces derived from section-style control frames and constrained by field-based structural measurements are employed as partially automated design aids intended to speed up and streamline the 3-D geological model building process. Some design degrees of freedom such as NURBS tension (or weights), knot sequencing and tying surface features are also discussed with examples drawn from spatial and structural data collected in Baffin Island by the Geological Survey of Canada and nearmine exploration data from Canadian mines. Interpolation of field-based structural measurements along the boundary of an unknown surface is also demonstrated. This work is potentially relevant to regional mappers and others dealing with sparse spatial and structural data, and/or conceptual surface modelling. Numéro de notice : A2005-072 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-004-5620-8 En ligne : https://doi.org/10.1007/s10707-004-5620-8 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27210 [article]

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057-05011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Interpretive tools for 3-d structural geological modelling part 1: Bézier-based curves, ribbons and grip frames / E.A. DE Kemp in Geoinformatica, vol 7 n° 1 (March - May 2003)  

Public [article]  inGeoinformatica > vol 7 n° 1 (March - May 2003) . - pp 55 - 71 Titre : Interpretive tools for 3-d structural geological modelling part 1: Bézier-based curves, ribbons and grip frames Type de document : Article/Communication Auteurs : E.A. DE Kemp, Auteur ; K.B. Sprague, Auteur Année de publication : 2003 Article en page(s) : pp 55 - 71 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] carte géologique [Termes IGN] géologie structurale [Termes IGN] modélisation 3D [Termes IGN] outil informatique [Termes IGN] système d'information géographique [Termes IGN] visualisation 3D Résumé : (Auteur) Interpreting the geometry of geological objects is a standard activity of fieldbased geologists. We present new Graphics tools that will aid in extending this activity from 2D geological mapping into a 3D environment. Much of the existing 3D geological modeling software supports the construction of objects with the input of dense control data. However, for regional mapping and near mine exploration work, sparse data is the norm. Tools are required therefore, which give the expert interpreter full control of the graphics objects, while at the same time constraining interpretations to specific control data from field observations. We present the initial results of a software design and programming project for the visualization of complex regional scale geologic objects using Bezierbased graphics tools that are optimized for sparse data interpretation. We also introduce the concept of a structural ribbon, which is a 3D extended map trace, along with methods for the optimization of surface construction using graphical grip frames. Numéro de notice : A2003-061 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1023/A:1022822227691 En ligne : https://doi.org/10.1023/A:1022822227691 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22357 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
057-03011	RAB	Revue	Centre de documentation	En réserve L003	Disponible