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Geographical Information 97: from research to application through cooperation, Third joint European conference & exhibition on Geographical Information [AM-FM], 1. Volume 1 / S. Hodgson (1997)Voir aussiContient
- Visualization strategies and techniques for high-dimensional spatio-temporal data / U. Streit (16/04/1997)
- Geographical information technology as a planning tool / Stan Geertman (16/04/1997)
- 3D-GIS for urban planning : objet hierarchy, methods and interactivity / A. Koninger (16/04/1997)
- The ruimpad design module : a GIS tool to support integration of urban and transportation planning / M. Van Der Vlugt (16/04/1997)
- Urban land use data spatio-temporal modelling / P. Serra (16/04/1997)
- Integrated city management system-decentralised information service / I. Nikl (16/04/1997)
- Multi-parameter visualisation of 3D-4D spatio-temporal data / I.M. Brown (06/04/1997)
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Code-barres Cote Support Localisation Section Disponibilité 66170-01A CG.97 Livre Centre de documentation Congrès Disponible Geographical Information 97: from research to application through cooperation, Third joint European conference & exhibition on Geographical Information [AM-FM], 2. Volume 2 / S. Hodgson (1997)
Titre de série : Geographical Information 97: from research to application through cooperation, Third joint European conference & exhibition on Geographical Information [AM-FM], 2 Titre : Volume 2 Type de document : Actes de congrès Auteurs : S. Hodgson, Éditeur scientifique ; Massimo Rumor, Éditeur scientifique ; EGIS, Auteur ; Janjaap Harts, Éditeur scientifique ; Urban data management society, Auteur Editeur : Oxford, Amsterdam, ... : IOS Press Année de publication : 1997 Conférence : GI 1997, 3rd joint European conference & exhibition 1997 on Geographical Information 16/04/1997 18/04/1997 Vienne Autriche Importance : 764 p. Format : 16 x 24 cm ISBN/ISSN/EAN : 978-4-274-90156-0 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Information géographique
[Termes IGN] aménagement
[Termes IGN] Autriche
[Termes IGN] cadastre
[Termes IGN] cartographie
[Termes IGN] environnement
[Termes IGN] Europe (géographie politique)
[Termes IGN] formation
[Termes IGN] formation continue
[Termes IGN] grande échelle
[Termes IGN] modèle numérique de terrain
[Termes IGN] système d'information géographiqueNuméro de notice : 66170B Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Actes Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=36949 Voir aussiContientRéservation
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Code-barres Cote Support Localisation Section Disponibilité 66170-01B CG.97 Livre Centre de documentation Congrès Disponible GIS-basierte Quantifizierung der Denudation im Zentralen Kenia Rift / S. Rössner (1997)
Titre : GIS-basierte Quantifizierung der Denudation im Zentralen Kenia Rift Titre original : [Quantification basée sur le SIG de la dénudation du rift central au Kenya] Type de document : Thèse/HDR Auteurs : S. Rössner, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 1997 Collection : DGK - C Sous-collection : Dissertationen num. 475 Importance : 111 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9515-1 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] données géologiques
[Termes IGN] érosion
[Termes IGN] géologie locale
[Termes IGN] Kenya
[Termes IGN] modèle numérique de terrain
[Termes IGN] point de vérification
[Termes IGN] positionnement par GPS
[Termes IGN] rift
[Termes IGN] système d'information géographique
[Termes IGN] variabilitéRésumé : (Auteur) In this work a GIS-based approach for quantification of average surface lowering (denudation) was developed. The goal in using a GIS (Geographic Information System) was to explore the methodological opportunities of a GIS in order to obtain spatially high-resolution denudation rates which form the basis for investigations of the regional variability of denudation and its relationship to other landscape-forming factors.
Such a spatially differentiated view of denudation requires a landscape frame of reference which allows direct quantification of the amount of eroded material in the source area of denudation. Within the Bahati-Kinangop Plateau (Central Kenya Rift) this condition is fulfilled for a 700 sq. km. area, where the highest topography is formed by relict elements of a dated erosional surface. These relict parts of the present relief are used to reconstruct the pre-erosional surface at the time when the plateau came into existence (about 3 Ma ago). The elevation difference between the pre-erosional and the present relief represents the amount of denudation since plateau formation. Thus, present topography is a direct measure of the long-term avarage intensity of denudation during the last 3 Ma in this area.
Calculation of denudation rates using the elevation difference method consisted of several steps. It included the derivation of modelling assumptions which were needed for reconstruction of the initial plateau surface based on the geological-tectonic evolution of the area. Additionally, the analogous geo-scientific and topographic data had to be integrated into a digital database in order to perform a quantification of denudation rates within a GIS.
Due to the close morphological relationship between inital and present surfaces, the generation of a Digital Elevation Model (DEM) of the present surface formed the starting point of the GIS-based data analysis. This DEM was obtained from contours of the 1:50.000 topographic maps by creating a triangulated irregular network (TIN) forming the basis for a regular raster interpolation. In order to achieve an average height accuracy in the range of half of an equidistance, a control point based approach was developed. It assess the height accuracy of the DEM in relation to map control points as well as to the real surface as determined by relative GPS measurements in the field.
The reconstruction of the initial plateau surface is based on a combined analysis of topographic and geological information within the GIS which resulted in 96 relict surface elements representing the input information for digital modelling of the pre-erosional relief. Plausibility checks showed that the generated initial surface is in overall accordance to the modelling assumptions. The denudation rates which were derived from the elevation differences between the two DEMs vary between 1 and 20 m/Ma in about 75 % of the study area. The most deeply eroded areas are characterized by rates between 45 and 100 m/Ma and are limited to 5 % of the area. The relict parts of the relief with denudation rates between 0 and 1 m/Ma occupy about 5 % of the area. These results compare well with rates typical for tectonically stable highland areas of Africa.
This GIS-based approach allows assessment of denuation rates in a well understood and reliable way. The results are characterized by a high spatial resolution which has not been obtained so far by other methods used for quantification of denudation. These high resolution rates offer the opportunity of a differentiated regional analysis. As long-term avarage rates they reflect the natural intensity of denudation. Such information are of special value in this area of present intense farming, because they can be used for estimating the influence of human landuse on the intensity of denudation.
(Auteur)In this work a GIS-based approach for quantification of average surface lowering (denudation) was developed. The goal in using a GIS (Geographic Information System) was to explore the methodological opportunities of a GIS in order to obtain spatially high-resolution denudation rates which form the basis for investigations of the regional variability of denudation and its relationship to other landscape-forming factors.
Such a spatially differentiated view of denudation requires a landscape frame of reference which allows direct quantification of the amount of eroded material in the source area of denudation. Within the Bahati-Kinangop Plateau (Central Kenya Rift) this condition is fulfilled for a 700 sq. km. area, where the highest topography is formed by relict elements of a dated erosional surface. These relict parts of the present relief are used to reconstruct the pre-erosional surface at the time when the plateau came into existence (about 3 Ma ago). The elevation difference between the pre-erosional and the present relief represents the amount of denudation since plateau formation. Thus, present topography is a direct measure of the long-term avarage intensity of denudation during the last 3 Ma in this area.
Calculation of denudation rates using the elevation difference method consisted of several steps. It included the derivation of modelling assumptions which were needed for reconstruction of the initial plateau surface based on the geological-tectonic evolution of the area. Additionally, the analogous geo-scientific and topographic data had to be integrated into a digital database in order to perform a quantification of denudation rates within a GIS.
Due to the close morphological relationship between inital and present surfaces, the generation of a Digital Elevation Model (DEM) of the present surface formed the starting point of the GIS-based data analysis. This DEM was obtained from contours of the 1:50.000 topographic maps by creating a triangulated irregular network (TIN) forming the basis for a regular raster interpolation. In order to achieve an average height accuracy in the range of half of an equidistance, a control point based approach was developed. It assess the height accuracy of the DEM in relation to map control points as well as to the real surface as determined by relative GPS measurements in the field.
The reconstruction of the initial plateau surface is based on a combined analysis of topographic and geological information within the GIS which resulted in 96 relict surface elements representing the input information for digital modelling of the pre-erosional relief. Plausibility checks showed that the generated initial surface is in overall accordance to the modelling assumptions. The denudation rates which were derived from the elevation differences between the two DEMs vary between 1 and 20 m/Ma in about 75 % of the study area. The most deeply eroded areas are characterized by rates between 45 and 100 m/Ma and are limited to 5 % of the area. The relict parts of the relief with denudation rates between 0 and 1 m/Ma occupy about 5 % of the area. These results compare well with rates typical for tectonically stable highland areas of Africa.
This GIS-based approach allows assessment of denuation rates in a well understood and reliable way. The results are characterized by a high spatial resolution which has not been obtained so far by other methods used for quantification of denudation. These high resolution rates offer the opportunity of a differentiated regional analysis. As long-term avarage rates they reflect the natural intensity of denudation. Such information are of special value in this area of present intense farming, because they can be used for estimating the influence of human landuse on the intensity of denudation.Numéro de notice : 28015 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=63362 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 28015-01 37.40 Livre Centre de documentation Géomatique Disponible 28015-02 37.40 Livre Centre de documentation Géomatique Disponible Méthodes de cartographie de la précision disponible pour différents paramètres extraits d'un modèle numérique de terrain / J. Charleux (1997)
Titre : Méthodes de cartographie de la précision disponible pour différents paramètres extraits d'un modèle numérique de terrain Type de document : Mémoire Auteurs : J. Charleux, Auteur Editeur : Champs/Marne : Université de Marne-la-Vallée Année de publication : 1997 Importance : 61 p. Format : 21 X 30 cm Note générale : Bibliographie
Mémoire de fin de stage, DEA sciences de l'information géographiqueLangues : Français (fre) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] limite de résolution géométrique
[Termes IGN] modèle numérique de terrain
[Termes IGN] photogrammétrie
[Termes IGN] précision géométrique (imagerie)
[Termes IGN] qualité des donnéesIndex. décimale : DSIG Mémoires du master 2 IG, du master 2 SIG, de l'ex DEA SIG Résumé : (Auteur) Ce rapport étudie les paramètres locaux de pente et d'orientation, suivant la ligne de plus grande pente, nécessaires à la connaissance de la trajectoire de l'eau. L'évaluation de la précision de ces deux variables est effectuée à partir d'un MNT fourni par l'IGN et grâce à des mesures topométriques réalisées sur un ensemble de points de validation. Les résultats soulignent le fait que la précision dépend de la résolution considérée et de la méthode d'échantillonnage. Numéro de notice : 27705 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Mémoire Master 2 IG Organisme de stage : Laboratoire commun de télédétection Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=51584 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 27705-01 DSIG Livre Centre de documentation Travaux d'élèves Disponible 27705-02 DSIG Livre Centre de documentation Travaux d'élèves Disponible Modèles numériques de terrain : aspects techniques / B. Allouche in Signature, n° 8 (janvier 1997)
[article]
Titre : Modèles numériques de terrain : aspects techniques Type de document : Article/Communication Auteurs : B. Allouche, Auteur ; Gilles Troispoux, Auteur Année de publication : 1997 Article en page(s) : pp 10 - 16 Langues : Français (fre) Descripteur : [Vedettes matières IGN] Cartographie numérique
[Termes IGN] données matricielles
[Termes IGN] données vectorielles
[Termes IGN] modèle numérique de terrainNuméro de notice : A1997-019 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25879
in Signature > n° 8 (janvier 1997) . - pp 10 - 16[article]Segmentation multi-échelle d'un modèle numérique de terrain / G. Dufourcq (1997)PermalinkSymposium hydrographique, 15ème conférence hydrographique internationale / Organisation hydrographique internationale (1997)PermalinkOrthophotographies numériques pour un environnement micro-informatique / M. Ettarid in Bulletin [Société Française de Photogrammétrie et Télédétection], n° 144 (Octobre 1996)PermalinkExtraction d'éléments caractéristiques pour une généralisation automatique en relief / Edouard Beauvillain in Revue internationale de géomatique, vol 6 n° 2-3 (juin – août 1996)PermalinkEvaluation d'un processus automatique de production de courbes de niveau / Edouard Beauvillain in Bulletin du comité français de cartographie, n° 146 - 147 (mars - août 1996)PermalinkProduction automatique de courbes de niveau à partir de photographies aériennes / Philippe Guiavarc'h in Bulletin du comité français de cartographie, n° 146 - 147 (mars - août 1996)Permalink18th international congress ISPRS, Volume 1. Commission 1 Sensors, platforms and imagery / Karl Kraus (1996)Permalink18th international congress ISPRS, Volume 2. Technical Commission 2 Systems for data processing, analysis and representation / Karl Kraus (1996)PermalinkPermalink18th international congress ISPRS, Volume 4. Technical Commission 4 Mapping and Geographic Information Systems / Karl Kraus (1996)Permalink18th international congress ISPRS, Volume 6. Commission 6 Economics, professional matters and education / Karl Kraus (1996)Permalink18th international congress ISPRS, Volume 7. Commission 7 Ressource and Environmental Monitoring / Karl Kraus (1996)PermalinkApplications of laser GPS and GIS technologies in geodesy, papers, Sofia (Bulgaria), 13 - 14 novembre 1996 / International society for photogrammetry and remote sensing (1980 -) (1996)PermalinkPermalinkCartographie des sols / Jean-Paul Legros (1996)PermalinkComparaison de différentes configurations stéréoscopiques, des bandes spectrales à 5m et des modes de compression de données simulées de SPOT 5 pour la Cartographie / Jean-Paul Sempère in Bulletin [Société Française de Photogrammétrie et Télédétection], n° 141 (Janvier 1996)PermalinkPermalinkEin neuer Ansatz zur kartographischen Verdrängung auf der Grundlage eines mechanischen Federmodells / Joachim Bobrich (1996)PermalinkEuroconférence SIG / Euroconference SIG (1996)PermalinkGIS Frontiers in business and science: GIS Brno'96 Conference and ICA Map use commission session, Volume 1. Proceedings / Milan Konecny (1996)Permalink