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Steep-slope monitoring: GPS multi-antenne system at Xiaowan Dam / X. He in GPS world, vol 16 n° 11 (November 2005)
[article]
Titre : Steep-slope monitoring: GPS multi-antenne system at Xiaowan Dam Type de document : Article/Communication Auteurs : X. He, Auteur ; W. Sang, Auteur ; X. Ding, Auteur Année de publication : 2005 Article en page(s) : pp 20 - 25 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] antenne GPS
[Termes IGN] barrage
[Termes IGN] centrale hydroélectrique
[Termes IGN] Chine
[Termes IGN] effondrement de terrain
[Termes IGN] pente
[Termes IGN] positionnement par GPS
[Termes IGN] précision millimétrique
[Termes IGN] risque majeur
[Termes IGN] surveillance d'ouvrageRésumé : (Auteur) Although an effective tool, for deformation monitoring of large structures and high-risk slopes GPS can also entail a high-cost disavantage in large projects. A remote-controlled monitoring system using electronic switching device for a multiple antennas watches the steep slopes under construction at the Xiaowan hydropower station in China. Numéro de notice : A2005-435 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27571
in GPS world > vol 16 n° 11 (November 2005) . - pp 20 - 25[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 067-05111 SL Revue Centre de documentation Revues en salle Disponible Towards a potential research agenda to guide the implementation of spatial data infrastructures: a case study from India / Yola Georgiadou in International journal of geographical information science IJGIS, vol 19 n° 10 (november 2005)
[article]
Titre : Towards a potential research agenda to guide the implementation of spatial data infrastructures: a case study from India Type de document : Article/Communication Auteurs : Yola Georgiadou, Auteur ; S.K. Puri, Auteur ; S. Sahay, Auteur Année de publication : 2005 Article en page(s) : pp 1113 - 1130 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] cultures
[Termes IGN] gestion de l'eau
[Termes IGN] gestion des connaissances (organisation)
[Termes IGN] implémentation (informatique)
[Termes IGN] Inde
[Termes IGN] infrastructure nationale des données localisées
[Termes IGN] pays en développementRésumé : (Auteur) Recently, Spatial Data Infrastructures (SDIs) has been a rapidly expanding field and broadly assumed to underpin the development of information society and the knowledge economy. In this paper, we argue that the anticipated benefits of SDIs have largely not yet been generally realized in practice due to a lack of a robust theoretical framework as well as insufficient empirical research to guide the implementation efforts. We posit that learnings from the allied discipline of Information Infrastructures, which has matured during the 1990s in response to the proliferation of distributed, complex, and heterogeneous networked systems, can provide a useful theoretical lens to inform the emerging domain of SDIs. We focus on three key concepts identified in the domain of information infrastructure theory, viz. the installed base, reflexive standardization, and cultivation approach to design, to develop a theoretical framework, which is then applied to analyse the ongoing initiative to establish National Spatial Data Infrastructure (NSDI) in India. This analysis helps us to provide the basis to articulate a potential research agenda for both theory and practice-which, we believe, offers the promise to better conceptualize and implement SDIs, particularly in developing country settings like India. Numéro de notice : A2005-502 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810500286950 En ligne : https://doi.org/10.1080/13658810500286950 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27638
in International journal of geographical information science IJGIS > vol 19 n° 10 (november 2005) . - pp 1113 - 1130[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-05091 RAB Revue Centre de documentation En réserve L003 Disponible 079-05092 RAB Revue Centre de documentation En réserve L003 Disponible Wavelet filter analysis of local atmospheric pressure effects on gravity variations / X.G. Hu in Journal of geodesy, vol 79 n° 8 (November 2005)
[article]
Titre : Wavelet filter analysis of local atmospheric pressure effects on gravity variations Type de document : Article/Communication Auteurs : X.G. Hu, Auteur ; L.T. Liu, Auteur ; et al., Auteur Année de publication : 2005 Article en page(s) : pp 447 - 459 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] anomalie de pesanteur
[Termes IGN] champ de pesanteur local
[Termes IGN] Chine
[Termes IGN] filtrage du signal
[Termes IGN] fonction harmonique
[Termes IGN] gravimètre supraconducteur
[Termes IGN] image multibande
[Termes IGN] levé gravimétrique
[Termes IGN] ondelette
[Termes IGN] pression atmosphérique
[Termes IGN] saisonRésumé : (Auteur) An efficient method is proposed for the analysis of atmospheric pressure effects on gravity variations. It processes gravity variations and pressure signals using an orthogonal filter bank derived from high-degree Daubechies wavelets. The method introduces the atmospheric pressure admittance, which is both time- and frequency-dependent, and thus provides more information about when and how the frequency components in the pressure signal influence gravity variations. We demonstrate the efficiency of the wavelet method by applying it to observations from the Wuhan (China) superconducting gravimeter station. The analysis of gravity and pressure signals in 14 sub-bands with different bandwidths covering a frequency range from 0.176 to 720cpd (cycles per day) reveals that local atmospheric pressure fluctuations start to induce obvious effects on gravity variations in the seismic band 0.52-1.04 mHz (periods 16 to 32 min) and highly cor-relate with gravity variation in the long-period seismic mode band 0.26-0.52 mHz (periods 32-64 min). The harmonics of solar heating-induced atmospheric tides play a leading role in interfering with the variation of gravity residuals in the frequency band 0.704-11.25 cpd (periods 128 min to 1.42 day). Local atmospheric pressure effects on gravity variation are very strong in the frequency band 0.176-0.704cpd (periods 1.42-5.69 day). Accurately filtering quarter-diurnal tides into a narrow band further demonstrates the efficiency of the wavelet method. After removing secular gravity changes and long-period atmospheric pressure variations, we show that there are obvious variations of local pressure admittance on time scales of hours to days. We also reveal seasonal variability of pressure admittances in the band 0. 176-0.352 cpd (periods 2.84-5.69 day) after removing the effects of solar heating atmospheric tides. Numéro de notice : A2005-461 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-005-0486-6 En ligne : https://doi.org/10.1007/s00190-005-0486-6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27597
in Journal of geodesy > vol 79 n° 8 (November 2005) . - pp 447 - 459[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 266-05081 RAB Revue Centre de documentation En réserve L003 Disponible Recognition of gypsum geohorizons in the Sivas Basin (Turkey) using ASTER and Landsat ETM+ images / K.S. Kavak in International Journal of Remote Sensing IJRS, vol 26 n° 20 (October 2005)
[article]
Titre : Recognition of gypsum geohorizons in the Sivas Basin (Turkey) using ASTER and Landsat ETM+ images Type de document : Article/Communication Auteurs : K.S. Kavak, Auteur Année de publication : 2005 Article en page(s) : pp 4583 - 4596 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] Ankara (Turquie)
[Termes IGN] fusion d'images
[Termes IGN] gypse
[Termes IGN] image Landsat-ETM+
[Termes IGN] image Terra-ASTER
[Termes IGN] tectonique
[Termes IGN] transformation de BroveyRésumé : (Auteur) The Tertiary Sivas Basin contains widespread, tectonically deformed deposits of massive Oligocene gypsum. This unit is one of the most important factors controlling the tectono-stratigraphic evolution of the basin insofar as these deposits are interpreted as décollement levels. As a considerable fold and thrust belt, the Sivas Basin also has a remarkable structural expression within these evaporite deposits, as seen in satellite images aided by colour composites. Because of the and climatic conditions of the region, the basin provides ease of interpretation geologically in terms of the synoptic-view capability of broad-band multispectral data sets, such as ASTER and Landsat ETM+. In this study, various processing methods-such as data fusion and decorrelation stretching-were applied to highlight Oligocene gypsum deposits of the basin. Numéro de notice : A2005-466 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160500185607 En ligne : https://doi.org/10.1080/01431160500185607 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27602
in International Journal of Remote Sensing IJRS > vol 26 n° 20 (October 2005) . - pp 4583 - 4596[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 080-05201 RAB Revue Centre de documentation En réserve L003 Exclu du prêt An artificial-neural-network-based, constrained CA model for simulating urban growth / Q. Guan in Cartography and Geographic Information Science, vol 32 n° 4 (October 2005)
[article]
Titre : An artificial-neural-network-based, constrained CA model for simulating urban growth Type de document : Article/Communication Auteurs : Q. Guan, Auteur ; L. Wang, Auteur ; K.C. Clarke, Auteur Année de publication : 2005 Article en page(s) : pp 369 - 380 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] automate cellulaire
[Termes IGN] croissance urbaine
[Termes IGN] données localisées
[Termes IGN] modèle mathématique
[Termes IGN] occupation du sol
[Termes IGN] Pékin (Chine)
[Termes IGN] réseau neuronal artificiel
[Termes IGN] simulationRésumé : (Auteur) Insufficient research has been done on integrating artificial-neural-network-based cellular automata (CA) models and constrained CA models, even though both types have been studied for several years. In this paper, a constrained CA model based on an artificial neural network (ANN) was developed to simulate and forecast urban growth. Neural networks can learn from available urban land-use geospatial data and drus deal with redundancy, inaccuracy, and noise during the CA parameter calibration. In the ANN-Urban-CA model we used, a two-layer Back-Propagation (BP) neural network bas been integrated into a CA model to seek suitable parameter values that match the historical data. Each cell's probability of urban transformation is determined by the neural network during simulation. A macro-scale socio-economic model was run together with the CA model to estimate demand to urban space in each period in the future. The total number of new urban cells generated by the CA model was constrained, taking such exogenous demands as population forecasts into account. Beijing urban growth between 1980 and 2000 was simulated using this model, and long-term (2001-2015) growth was forecast based on multiple socio-economic scenarios. The ANN-Urban-CA model was found capable of simulating and forecasting the complex and non-linear spatial-temporal process of urban growth in a reasonably short time, with less subjective uncertainty. Numéro de notice : A2005-539 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1559/152304005775194746 En ligne : https://doi.org/10.1559/152304005775194746 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27675
in Cartography and Geographic Information Science > vol 32 n° 4 (October 2005) . - pp 369 - 380[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 032-05041 RAB Revue Centre de documentation En réserve L003 Disponible Measurement of DEM roughness using the local fractal dimension / Hind Taud in Géomorphologie, vol. 11 n° 4 (octobre - décembre 2005)PermalinkDerivation of terrain roughness indicators via granulometries / L.T. Tay in International Journal of Remote Sensing IJRS, vol 26 n° 18 (September 2005)PermalinkApport de la télédétection à la modélisation géologique volumique (région d'Al Quway'iyah en Arabie saoudite) / O.B. Alami in Revue Française de Photogrammétrie et de Télédétection, n° 178 (Septembre 2005)PermalinkImage misregistration error in change measurements / H. Wang in Photogrammetric Engineering & Remote Sensing, PERS, vol 71 n° 9 (September 2005)PermalinkRegional study for mapping the natural resources prospect and problem zones using remote sensing and GIS / R.K. Jaiswal in Geocarto international, vol 20 n° 3 (September - November 2005)PermalinkComplexity metrics to quantify semantic accuracy in segmented Landsat images / Alfred Stein in International Journal of Remote Sensing IJRS, vol 26 n° 14 (July 2005)PermalinkBiodiversity surveying and monitoring: using GIS and GPS in Annapurna conservation area of Nepal / N.R. Chapagain in GIM international, vol 19 n° 7 (July 2005)PermalinkLidar on the level in Afghanistan: GPS, inertial map the Kabul road / S. Newby in GPS world, vol 16 n° 7 (July 2005)PermalinkCartographie en Jordanie : beaucoup de chemin parcouru / Françoise de Blomac in SIG la lettre, n° 68 (juin 2005)PermalinkSPOT revisited: accuracy assessment, DEM generation and validation from stereo SPOT 5 HRG images / G. Buyuksalih in Photogrammetric record, vol 20 n° 110 (June - August 2005)Permalink