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Par Collection- Bibliographie Géographique Internationale (11862)
- Surbatorat (25)
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- Grafigéo. Mémoires et documents de l'UMR PRODIG (1)
- PÉCSI, M., (Editeur scientifique) (24)
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- Special issue : Methods of mass balance measurements and modeling (31)
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- Gedenkschrift für Rainer Joha Bender. Beiträge zur geographischen Methode und Landeskunde II (19)
- Ouvrage en hommage à Rainer Joha Bender. Communications sur la méthode géographique et les géographies régionales II (19)
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- Airborne LiDAR for DEM generation : some critical issues
- This paper reviews the recent advances of airborne LiDAR systems and the use of LiDAR data for DEM generation, with special focus on LiDAR data filters, interpolation methods, DEM resolution, and LiDAR data reduction. Separating LiDAR points
- into ground and non-ground is the most critical and difficult step for DEM generation from LiDAR data. Commonly used and most recently developed LiDAR filtering methods are presented. Interpolation methods and choices of suitable interpolator and DEM
- Understanding airborne radiometric survey signals across part of eastern England
- The AA. have analysed the joint spatial variation of the gamma signal and the soil geochemical data using multivariate geostatistical methods. The results support the expectation that radiometric signals for K and Th provide information on parent
- material in the young landscapes of England and Wales. The AA. are therefore confident that airborne radiometric surveys would be useful for making thematic maps of soil, particularly the soil's texture and closely related properties across England
- Quantifying interpolation errors in urban airborne laser scanning models
- La méthode est susceptible d'applications multiples dans la modélisation des surfaces urbaines. Identification et analyse de l'amplitude de la structure spatiale des résidus provenant des modèles airborne laser scanning, à des échelles multiples. Il
- Feature based image processing methods applied to bathymetric measurements from airborne remote sensing in fluvial environments
- In this paper, illumination variations are corrected with feature based image processing, which is used to identify areas in an image with a near-zero water depth. The end product is an automated bathymetric mapping method capable of a 4 m2 spatial
- Evaluating the potential of an airborne laser-scanning system for measuring volume changes of glaciers
- Special issue : Methods of mass balance measurements and modeling
- in autumn 1997. Preliminary results from Unteraar Glacier are presented, and the potential of this method for the generation of DEMs of firn area is discussed.
- Uber die Einsatzmoglichkeit abbildender Infrarot-Luftmessverfahren bei der Erkundung von Senkungsgebieten. (On the applicability of airborne infrared methods in the reconnaissance of subsidence areas)
- The use of the IR-range in remote sensing represents an important increase in possibilities of geophysical researching. Especially imaging methods like IR-photography and thermography show some advantages in the investigation of the reflection
- -and emission-behaviour of the earth's surface. Potential sinkholes are connected with some direct and indirect anomalies at the earth's surface, which can be detected by IR-remote sensing methods. By means of the common use of IR-photography and thermography
- Towards accurate determination of surface height using modern geoinformatic methods : possibilities and limitations
- Over recent decades several modern geoinformatic methods have emerged, including global positioning system (GPS), interferometric radar, and airborne laser scanner (ALS) or lidar. In conjunction with the conventional survey and photogrammetric
- method, they have found wide applications that demand varying levels of accuracy. In this paper, the principles of each method are briefly summarized. The discussion then concentrates on the accuracy level achievable with each method.
- Evaluating volumetric glacier change methods using airborne laser scanning data
- In this study the AA. used high-resolution airborne laser scanning data from the Findelengletscher in the Swiss Alps to evaluate state-of-the-art volumetric glacier change methods. For the first time they have been able to simulate errors arising
- from different geodetic methods and spatial resolutions. The evaluation showed that, although the digital elevation models were perfectly co-registered, systematic and random method- and scale-dependent errors still occurred. These errors have an impact
- on the resulting volume changes at lower spatial resolutions and may lead to exponentially larger uncertainties. Volume changes from contour methods provided reasonably accurate results, while volumetric change assessments from central profile lines were especially
- Geomorphological environments. Research methods on biotic and abiotic anvironments
- field objects, which can't be done with any other methods (or just with bigger efforts and disturbance). The purpose of this article is to provide an example of the geomorphological application of airborne imaging techniques using radio-controlled model
- Airborne images obtained by radio-controlled aerial vehicles provide an alternative way for the environmental and biological researches as well as geomorphological studies. The model airplanes give the possibility for landscape mapping or count
- Distance correlation matrix (DISTCORMAT) is a new spatial trend analysis that correlates spatial variables against the distance to every variable point. This method is applied to locate the center of on urban heat island, where the imput
- is an airborne thermal infrared image. (Ed.).
- Remote sensing of coastal waters by airborne lidar and satellite radiometer. Part 2 : measurements
- Développe la méthode sur le nord de la mer Adriatique en calculant les coefficients spécifiques d'extinction de particules chlorophylliennes A et non chlorophylliennes, à partir de comparaisons in situ et sous l'eau de mesures d'irradiance, avec les
- Generation of a digital elevation model of Mols Bjerge, Denmark, and georeferencing of airborne scanner data
- Cet article compare différents modèles numériques de terrain et les méthodes de correction des données de télédétection utilisés pour l'étude d'une région du Danemark à topographie complexe : la région de Mols Bjerge, dans la péninsule du Djursland
- Downward continuation of airborne gravity data
- polaires. Dans cet article, des méthodes opérationnelles différentes basées sur la collocation et la FFT sont tracées et appliquées à la continuation descendante du fusionnement de données de la surface des levés aéroportés sur le Groenland et le Svalbard
- Water surface mapping from airborne laser scanning using signal intensity and elevation data
- The AA. present a novel, automatic method for water surface classification and delineation by combining the geometrical and signal intensity information provided by airborne laser scanning (ALS). The reflection characteristics of water surfaces
- Mass balance of the Greenland ice sheet : can modern observation methods reduce the uncertainty?
- Special issue : Methods of mass balance measurements and modeling
- will be on airborne and satellite remote sensing methods. Remote sensing observations combined with ice sheet modelling seems an alternative way of obtaining long-term and short-term ice sheet contributions to sea-level change.
- The purpose of this paper is to point to methods that have the potential to reduce the uncertainty of estimates of the long-term mass balance of the ice-sheet. Studies of the Greenland ice sheet will be used as an illustration. The focus
- A brief summary is given of experiments with land-use mapping from LANDSAT-2 data and from airborne MSS in the Linkoping region, Sweden. The results from a single-date analysis have been compared with a multi-date analysis. Methods for monitoring
- forest clear cutting during the period 1975-1979 using digital multi-temporal LANDSAT imageries are also presented. Another study deals with methods to use digitized map information in the multi-date LANDSAT classification process and methods to select
- the most informative combination of wavelength bands and registration dates. In the first application of these methods we have tried to classify mires.
- Aerial photosieving of exposed gravel bars for the rapid calibration of airborne grain size maps
- This paper presents a method developed to remove the need for field based calibration data. Called ‘aerial photosieving’, this method consists of using the same very high resolution aerial imagery intended for grain size map production to visually
- photosieving gives similar results when compared with field-based data with only a slight systematic overprediction. The new aerial photosieving method therefore simplifies the overall procedure required for the production of grain size maps and thus improves
- Airborne Laser scanning : an operational remote sensing technique for digital elevation mapping in coastal areas
- Atlantic Ocean ; Europe ; Netherlands ; North Atlantic ; North Sea ; Northeast Atlantic ; Western Europe ; airborne methods ; altitude ; cartography ; coastal dunes ; coastal environment ; data acquisition ; data processing ; digital terrain models
- Altitude ; Cartographie ; Dune côtière ; Europe ; Europe Ouest ; Gestion ; Mer du Nord ; Milieu littoral ; Modèle numérique terrain ; Morphodynamique ; Méthode aéroportée ; Méthode laser ; Méthode scanneur ; Océan Atlantique ; Océan Atlantique Nord
- ; geographic information systems ; landform evolution ; laser methods ; management ; remote sensing ; scanner methods
- Extraction of the textural informations with airborne and spatial RSO images using a neural classification
- La réalité de terrain en télédétection : pratiques et méthodes (Saint Foy, 13-17 octobre 1997)
- Africa ; North Africa ; Pixel ; Space remote sensing ; Tunisia ; airborne methods ; classification ; image analysis ; networks ; neural networks ; textures
- Afrique ; Afrique du Nord ; Analyse image ; Classification ; Méthode aéroportée ; Pixel ; Réseau ; Réseau neuronal ; Satellite RADARSAT-1 ; Texture ; Tunisie ; Télédétection spatiale
- Le développement d'une méthode de classification par réseau de neurones (RN) d'images RSO aéroportées et RADARSAT-1 fait l'objet de cet article. Les données présentées au réseau sont des vecteurs de l'image dont les composantes sont les valeurs des
- An airborne spectroscopic image was flown over an intensively used agricultural area and over a location which had suffered from a forest fire. Many surfaces feature details could be indentified either from synthesized near true color images, from
- the normalized differential vegetation index (NDVI), from a principal component analysis or by treating the data with an unsupervised neural network. A comparison of the individual results demonstrate the strength of each method.