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Improved filtering parameter determination for the Goldstein radar interferogram filter / Z.W. Li in ISPRS Journal of photogrammetry and remote sensing, vol 63 n° 6 (November - December 2008)
[article]
Titre : Improved filtering parameter determination for the Goldstein radar interferogram filter Type de document : Article/Communication Auteurs : Z.W. Li, Auteur ; X.L. Ding, Auteur ; et al., Auteur Année de publication : 2008 Article en page(s) : pp 621 - 634 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] cohérence des données
[Termes IGN] filtrage du bruit
[Termes IGN] filtre de Goldstein
[Termes IGN] image radar moirée
[Termes IGN] radar à antenne synthétiqueRésumé : (Auteur) Phase noise in a radar interferogram is directly related to interferometric coherence and the look number of the interferogram. Therefore an optimal radar interferogram filter should incorporate information on both interferometric coherence and look number. We present a modification to the commonly used Goldstein filter by suggesting an improved determination of the filtering parameter. Experimental results with both simulated and real data sets show that the new filter offers much better results when used to filter radar interferograms. Copyright ISPRS Numéro de notice : A2008-435 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2008.03.001 En ligne : https://doi.org/10.1016/j.isprsjprs.2008.03.001 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29504
in ISPRS Journal of photogrammetry and remote sensing > vol 63 n° 6 (November - December 2008) . - pp 621 - 634[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-08061 SL Revue Centre de documentation Revues en salle Disponible Analysis of planimetric accuracy of airborne laser scanning surveys / M. George Vosselman in Bulletin des sciences géographiques, n° 22 (octobre 2008)
[article]
Titre : Analysis of planimetric accuracy of airborne laser scanning surveys Type de document : Article/Communication Auteurs : M. George Vosselman, Auteur Année de publication : 2008 Article en page(s) : pp 27 - 33 Note générale : Bibliographie Langues : Français (fre) Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] crète (ligne)
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] hauteur de vol
[Termes IGN] lasergrammétrie
[Termes IGN] modèle numérique de terrain
[Termes IGN] positionnement par GPS
[Termes IGN] précision des données
[Termes IGN] précision planimétrique
[Termes IGN] semis de points
[Termes IGN] télémétrie laser aéroportéRésumé : (Auteur) With the increasing pulse rates of airborne laser scanners point clouds become an interesting data source for mapping beyond the production of digital terrain models. Whereas height accuracy of point clouds is of prime importance for terrain models, mapping of buildings and other objects also requires an analysis of planimetric accuracy of point clouds. This paper presents a methodology to estimate relative strip offsets and standard deviations of X- and Y - coordinates using automatically extracted ridge lines of building in overlaps between strips. An analysis of three blocks with 200-250 million points each shows that constant strip offsets explain the majority of planimetric shifts between ridge lines in strip overlaps. It is demonstrated that strip offset below 3-4 cm and platform positioning noise of only 2 cm can be obtained with GPS configurations consisting of two onboard receivers and multiple reference stations in the terrain and a low flying height. Copyright INCT Numéro de notice : A2008-542 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29612
in Bulletin des sciences géographiques > n° 22 (octobre 2008) . - pp 27 - 33[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 253-08021 RAB Revue Centre de documentation En réserve L003 Disponible The GPS L2C signal: a preliminary analysis of data quality / Rodrigo Figueiredo Leandro in GPS world, vol 19 n° 10 (October 2008)
[article]
Titre : The GPS L2C signal: a preliminary analysis of data quality Type de document : Article/Communication Auteurs : Rodrigo Figueiredo Leandro, Auteur ; R.B. Langley, Auteur ; et al., Auteur Année de publication : 2008 Article en page(s) : pp 42 - 47 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] longueur d'onde
[Termes IGN] qualité des données
[Termes IGN] signal GPS
[Termes IGN] utilisateur civilRésumé : (Auteur) 56 and counting. That's the number of GPS satellites that have been launched over the past thirty years beginning with the first prototype {Block I) satellite, space vehicle number 1, in February 1978. Ten Block I satellites were successfully launched between 1978 and 1985 to demonstrate the feasibility of GPS. The first satellite of the Block II operational constellation was launched in February 1989. The four year hiatus in launches was due, in part, to the Space Shuttle Challenger disaster as it had been planned to launch the operational satellites using the Shuttle. Following the accident, it was decided to continue with expendable rockets for GPS launches but to switch to the newly designed Delta II rocket. The pace of Block II launches was rapid with five launches of the original Block II design in 1989 and four in 1990 a modified, version of the Block II satellite - the IIA - was develloped, and between 1990 and 1997,19 Block IIAs were launched. The Block II and IIA satellites established the operational GPS constellation. Full operational capability was declared on April 27,1995. A new satellite was developed for replenishing the constellation as the earlier satellites were retired. Following an initial launch failure, twelve of the Block lIR satellites were launched between 1997 and 2004. All of the satellites in the Block I, Block II, Block IIA, and Block llR, constellations transmitted what are now called the legacy signals : tne C/A-code on the L1 frequency of 1575.42 MHz and the P-code on L1 and the L2 frequency of 1227.60 MHz.The P-code has been encrypted to yield the Y-code since January 1994, denying its direct access by most civil users. Since the C/A-code was only transmitted on the L1 frequency, civil users have had to rely on suboptimal semicodeless techniques for the dual-frequency operation necessary for direct cancellation of ionospheric biases. In 1998, Vice-President Al Gore announced that a new civil signal on L2 would be transmitted by future GPS satellites. This new signal-L2C-joined the legacy signals beginning with the launch of modernized Block llR satellite. Six of these blockllR-M satellites have been launched to date.
In this month's column, we'll overview the characteristics of the new L2C signal and take a look at some of the analyses of received signals carried out by a team of researchers from the University of New Brunswick. Copyright Questex Media Group IncNuméro de notice : A2008-397 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29390
in GPS world > vol 19 n° 10 (October 2008) . - pp 42 - 47[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-08101 RAB Revue Centre de documentation En réserve L003 Disponible Coastal surveying techniques / C. Pennington in Geoinformatics, vol 11 n° 6 (01/09/2008)
[article]
Titre : Coastal surveying techniques Type de document : Article/Communication Auteurs : C. Pennington, Auteur ; P. Hobbs, Auteur Année de publication : 2008 Article en page(s) : pp 16 - 19 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] données lidar
[Termes IGN] érosion côtière
[Termes IGN] modélisation 3D
[Termes IGN] précision des données
[Termes IGN] Royaume-Uni
[Termes IGN] surveillance du littoral
[Termes IGN] télémétrie laser terrestreRésumé : (Auteur) This article describes work by the British Geological Survey (BGS) who are using terrestrial laser systems and other surveying techniques to improve our understanding of coastal erosion in different geological environments. These include chalk cliffs in Kent and Sussex, steep Jurassic cliffs in Yorkshire and Dorset and 'soft' cliffs in Kent, Norfolk and Yorshire. Copyright GEOinformatics Numéro de notice : A2008-341 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29334
in Geoinformatics > vol 11 n° 6 (01/09/2008) . - pp 16 - 19[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 262-08061 SL Revue Centre de documentation Revues en salle Disponible Detection, measurement and prediction of shoreline recession in Accra, Ghana / K. Appeaning Addo in ISPRS Journal of photogrammetry and remote sensing, vol 63 n° 5 (September - October 2008)
[article]
Titre : Detection, measurement and prediction of shoreline recession in Accra, Ghana Type de document : Article/Communication Auteurs : K. Appeaning Addo, Auteur ; M. Walkden, Auteur ; Jon P. Mills, Auteur Année de publication : 2008 Article en page(s) : pp 543 - 558 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] analyse diachronique
[Termes IGN] données de terrain
[Termes IGN] érosion côtière
[Termes IGN] Ghana
[Termes IGN] incertitude des données
[Termes IGN] littoral
[Termes IGN] modèle de simulation
[Termes IGN] montée du niveau de la mer
[Termes IGN] trait de côteRésumé : (Auteur) Coastal mapping, using various data capture and feature extraction techniques, has furthered understanding of trends in shoreline evolution by allowing calculation of accurate historic rates of change that subsequently enable the prediction of future shoreline positions through different modelling procedures. The results have helped influence coastal policy formulation and promoted the development of sustainable management practices in coastal regions throughout the developed world. However, sustainable coastal management is rarely practiced in developing countries, one of the fundamental reasons for this being a general lack of reliable and accurate historic data on shoreline position. Previous studies on the Ghanaian coastal region of Accra, where accurate and reliable geospatial data for analysis is scarce, have reported erosion rates of anything between two and eight metres per year. This high level of inconsistency in reported rates has hindered effective and sustainable coastal management. The research reported in this paper addresses this issue, using mapping data from 1904, 1974, 1996 and 2002 to estimate, by linear regression, shoreline recession in the Accra region. Predictions for the next 250 yr were then undertaken using a variety of techniques ranging from a process-based numerical model, SCAPE, to geometric approaches including historical trend analysis, the modified Bruun model and Sunamura’s shore platform model. Uncertainties in the various input data were accounted for, including historic recession rates, rock strength, sediment content and, importantly, future sea-level rise under different climate change scenarios. The mean historic rate of erosion in the Accra region was found to be 1.13 m/yr(10.17 m/yr), significantly less than previously reported, though still very high. Subsequent predictions were used to identify a series of significant economic, ecological and social features at risk, and to estimate when they will most likely be lost to erosion if left unprotected. The case study illustrates that, provided suitable predictive models are selected and the uncertainties involved in working with limited data sets are dealt with appropriately, it is possible to provide statistical information in support of sustainable coastal management for developing countries in the face of a changing climate. Copyright ISPRS Numéro de notice : A2008-387 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2008.04.001 En ligne : https://doi.org/10.1016/j.isprsjprs.2008.04.001 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29380
in ISPRS Journal of photogrammetry and remote sensing > vol 63 n° 5 (September - October 2008) . - pp 543 - 558[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-08051 SL Revue Centre de documentation Revues en salle Disponible GNSS solutions: quantifying the performance of navigation systems and standards for assisted-GNSS / Sam Pullen in Inside GNSS, vol 3 n° 6 (September 2008)PermalinkPositionnement de puits déviés : Implémentation des corrections à envisager lors de la représentation des trajectoires de puits déviés en projection cartographique, propositions et analyses de trois méthodologies possibles / A. Billault in XYZ, n° 116 (septembre - novembre 2008)PermalinkToward self-generalizing objects and On-the-Fly map generalization / M. Sabo in Cartographica, vol 43 n° 3 (September 2008)PermalinkEffects of DEM resolution and source on soil erosion modelling: a case study using the WEPP model / J.X. Zhang in International journal of geographical information science IJGIS, vol 22 n° 8-9 (august 2008)PermalinkExploring spatial data uncertainties in land-use change scenarios / N. Dendoncker in International journal of geographical information science IJGIS, vol 22 n° 8-9 (august 2008)PermalinkImage-based quality assessment of road databases / Markus Gerke in International journal of geographical information science IJGIS, vol 22 n° 8-9 (august 2008)PermalinkAccuracy assessment of high resolution satellite imagery orientation by leave-one-out method / Maria Antonia Brovelli in ISPRS Journal of photogrammetry and remote sensing, vol 63 n° 4 (July - August 2008)PermalinkA framework of region-based spatial relations for non-overlapping features and its application in object based image analysis / Y. Liu in ISPRS Journal of photogrammetry and remote sensing, vol 63 n° 4 (July - August 2008)PermalinkSpatial objects / R. Thompson in GIM international, vol 22 n° 7 (July 2008)PermalinkOn the accuracy assessment of celestial reference frame realizations / Z. Malkin in Journal of geodesy, vol 82 n° 6 (June 2008)PermalinkComparison of nine fusion techniques for very high resolution data / K.G. Nikolapoulos in Photogrammetric Engineering & Remote Sensing, PERS, vol 74 n° 5 (May 2008)PermalinkUse of a Kalman filter for the retrieval of surface BRDF coefficients with a time-evolving model based on the ECOCLIMAP land cover classification / O. Samain in Remote sensing of environment, vol 112 n° 4 (15/04/2008)PermalinkFast error analysis of continuous GPS observations / M. Bos in Journal of geodesy, vol 82 n° 3 (March 2008)PermalinkInnovations in individual feature history management: the significance of feature-based temporal model / J. Choi in Geoinformatica, vol 12 n° 1 (March - May 2008)PermalinkSpatial sampling uncertainty in SMEX04 soil moisture fields: a data-based resampling experiment / M. Gebremichael in Remote sensing of environment, vol 112 n° 2 (15/02/2008)PermalinkSpatially and temporally continuous LAI data sets based on an integrated filtering method: examples from North America / H. Fang in Remote sensing of environment, vol 112 n° 1 (15/01/2008)PermalinkEntwicklung eines Qualitätsmodells für die Generierung von digitalen Gelandemodellen aus airborne Laser scanning / Hans Jürg Luthy (2008)PermalinkÉtude comparative de différentes méthodes d'estimation / Samuel Nahmani (2008)PermalinkPermalinkFusion de connaissances imparfaites pour l'appariement de données géographiques / Ana-Maria Olteanu-Raimond (2008)PermalinkGeometric validation of a ground-based mobile laser scanning system / D. Barber in ISPRS Journal of photogrammetry and remote sensing, vol 63 n° 1 (January - February 2008)PermalinkPermalinkLa qualité des données géographiques / Centre d'études sur les réseaux, les transports, l'urbanisme et les constructions publiques (2008)PermalinkQualité de l'information géographique / Jean-François Hangouët (2008)PermalinkQuality aspects in spatial data mining, ch. 5. A multicriteria fusion approach for geographical data matching / Ana-Maria Olteanu-Raimond (2008)PermalinkPermalinkSDI as holistic framework / H. Mohammadi in GIM international, vol 22 n° 1 (January 2008)PermalinkThe European Information Society : Taking Geoinformation Science One Step Further, AGILE 2008 / Lars Bernard (2008)PermalinkWorkshop on production partnership management, Ordnance Survey, Southampton, 7-9 November 2007, England / Ray Patrucco (2008)PermalinkAppariement de données géographiques utilisant la théorie des croyances / Ana-Maria Raimond in Le monde des cartes, n° 194 (décembre 2007)PermalinkConvergence analysis and quality criteria for an iterative schematization of networks / S. Avelar in Geoinformatica, vol 11 n° 4 (December 2007)PermalinkUne nouvelle chaine de production pour les cartes topographiques à l'IGN / Arnaud Braun in Le monde des cartes, n° 194 (décembre 2007)PermalinkA theoretical approach to modeling the accuracy assessment of digital elevation models / F. Aguilar in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 12 (December 2007)PermalinkVisibility prediction based on artificial neural networks used in automatic network design / M. Saadatseresht in Photogrammetric record, vol 22 n° 120 (December 2007 - February 2008)PermalinkMethods for fine registration of cadastre graphs to images / Roger Trias-Sanz in IEEE Transactions on Pattern Analysis and Machine Intelligence, PAMI, vol 29 n° 11 (November 2007)PermalinkModel limitations and parameter-estimation methods for agricultural applications of polarimetric SAR interferometry / Juan M. Lopez-Sanchez in IEEE Transactions on geoscience and remote sensing, vol 45 n° 11 Tome 1 (November 2007)PermalinkA novel solution of the Finnish NSDI / Tuuli Toivonen in Geoinformatics, vol 10 n° 7 (01/11/2007)PermalinkVers une géographie volontaire ? / Françoise de Blomac in SIG la lettre, n° 91 (novembre 2007)PermalinkComparison of ground-based GPS precipitable water vapour to independent observations and NWP model reanalyses over Africa / Olivier Bock in Quarterly Journal of the Royal Meteorological Society, vol 133 n° 629 (Octobre 2007 part B)PermalinkMultispectral image classification: a supervised neural computation approach based on rough-fuzzy membership function and weak fuzzy similarity relation / A. Agrawal in International Journal of Remote Sensing IJRS, vol 28 n°19-20 (October 2007)PermalinkHigher order vagueness in geographical information: empirical geographical population of type N fuzzy sets / P. Fischer in Geoinformatica, vol 11 n° 3 (September - November 2007)PermalinkImprécision et incertitude en traitement de l'information géographique / Pierre Dumolard in Revue internationale de géomatique, vol 17 n° 3-4 (septembre 2007 – février 2008)PermalinkQuantification globale des écarts géométriques entre plans cadastraux DGI et référentiels IGN dans le cadre du géoreférencement de la BD parcellaire en mode image / F. Chahuneau in XYZ, n° 112 (septembre - novembre 2007)PermalinkUnified hybrid terrain representation based on local convexifications / M. Bóo in Geoinformatica, vol 11 n° 3 (September - November 2007)PermalinkCamera laser scanner / Luigi Colombo in GIM international, vol 21 n° 8 (August 2007)Permalink