Publications of Jean-Paul Donnay
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See detailA Methodology for Updating Large Scale Ortho-Photomaps by Means of VHR Satellite imagery
Donnay, Jean-Paul ULiege; Seba, Gautier; de Béthune, Stanislas et al

in Maktav, Derya; Jürgens, Carsten; Erber Sunar, Filiz (Eds.) et al Proceedings of the 3d International Symposium of Remote Sensing of Urban Areas (2002)

Some authorities (DGPL) of the Walloon Region (Belgium) are involved in the realization of a complete regional coverage (16,844 km²) of natural colour ortho-photomap to be used at large scales (up to 1 ... [more ▼]

Some authorities (DGPL) of the Walloon Region (Belgium) are involved in the realization of a complete regional coverage (16,844 km²) of natural colour ortho-photomap to be used at large scales (up to 1:4000). These are made of very high-resolution digital ortho-rectified aerial photos presented as raster files. Those rasters are grouped by corresponding administrative boundaries and distributed to the local authorities in order to be used for various land and urban planning purposes. One goal of the DGPL is to provide the local administrations with up to date image data, within the limits of some obvious financial constraints. Because significant changes in the landscape appear at different rates over the time and space, it was suggested to devise a methodology to find out these changes would require a rapid update of the imagery. In regard to this situation, a pilot project has been set up in the year 2000 aiming at detecting the location, the extent and the nature of landscape changes in contrasted areas - urban, suburban, rural - from adequately processed very high resolution (VHR) satellite images - typically Ikonos multi-spectral (4m) and panchromatic (1m) images. Hence, this project had to cope with various issues related to multi-source analysis, geometric and radiometric aspects of the processing VHR data, diachronic analysis, in order to provide the administration with the basic knowledge and the appropriate tools to carry out the proposed task. This communication presents the proposed operational methodology for change detection including all processing steps from the digital image processing (image fusion technique, ortho-rectification analysis, change detection schemes). Along the way it also introduces an assessment of the possible complementarities and convergence of VHR satellite imagery and aerial photography. [less ▲]

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See detailModelling geographical distributions in urban areas
Donnay, Jean-Paul ULiege; Unwin, David

in Donnay, Jean-Paul; Barnsley, M.; Longley, P. (Eds.) Remote Sensing and Urban Analysis (2001)

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See detailRemote Sensing and Urban Analysis - Introduction
Donnay, Jean-Paul ULiege; Barnsley, Mike; Longley, Paul

in Donnay, Jean-Paul; Barnsley, Mike; Longley, Paul (Eds.) Remote Sensing and Urban Analysis (2001)

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See detailRemote Sensing and Urban Analysis : A Research Agenda
Longley, Paul; Barnsley, Mike; Donnay, Jean-Paul ULiege

in Donnay, Jean-Paul; Barnsley, Mike; Longley, Paul (Eds.) Remote Sensing and Urban Analysis (2001)

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See detailRemote Sensing and Urban Analysis
Donnay, Jean-Paul ULiege; Barnsley, Mike J.; Longley, Paul A.

Book published by Taylor & Francis (2001)

One of the key geographical developments over the last two centuries has been that of urbanisation. In recent years this has exploded globally, particularly in developing countries. It is essential for ... [more ▼]

One of the key geographical developments over the last two centuries has been that of urbanisation. In recent years this has exploded globally, particularly in developing countries. It is essential for governments, planners and researchers in geography and allied fields to understand this process and the main way of being able to do this is to accurately map these changes. The main method of this mapping is Remote Sensing.This up-to-date analysis of the area looks at a wide range of methodologies currently being used to produce and analyse remotely sensed data of urban areas. The authors examine the various techniques used to extract information from digital, multispectral images of urban areas. Donnay and Barnsley then go on to look at the identification of urban forms, the delineation of agglomerations and the development of urban morphology, considering the analysis of integrated data sets and surface models and going on to look at the estimation of human population levels. [less ▲]

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See detailProgress in the Use of Vhr Satellite Imagery and Applications in Urban Remote Sensing
Donnay, Jean-Paul ULiege; Binard, Marc ULiege; Legros, Gauthier et al

in Space scientific research in Belgium (2001)

This paper presents various works completed by the laboratory SURFACES - Department of Geomatics, University of Liege - between 1994 and 2000 in the framework of the TELSAT programme. Not less than 22 ... [more ▼]

This paper presents various works completed by the laboratory SURFACES - Department of Geomatics, University of Liege - between 1994 and 2000 in the framework of the TELSAT programme. Not less than 22 studies have been achieved during this period, which mainly deal with the use of very high resolution (VHR) satellite imagery and urban remote sensing. Owing to the experience accumulated about these topics by the laboratory for the beginning of the TELSAT programme - in the mid of the '80s - the works here under consideration are mainly devoted to applied studies. However fundamental research is not withdrawn. The expectation — and recently the availability — of new sensors was the opportunity for simulating, developing and improving methods, notably in the domains of the fusion of images and satellite photogrammetry. Finally it is worth noting that, as far as our laboratory is concerned, the considered period is also characterized by a wide diffusion of the results of our researches in fundamental and applied remote sensing. Several books and many papers have been published while an international symposium was held in Liege dedicated to urban remote sensing. On the other hand, satellite maps. CD and Web sites have been largely distributed for vulgarisation purposes. [less ▲]

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See detailSpatial distribution of foraging in female Antarctic fur seals Actocephalus gazella in relation to oceanographic variables : a scale dependent approach using geographical information system
Guinet, Christophe; Dubroca, Laurent; Lea, Mary Anne et al

in Marine Ecology. Progress Series (2001), 219

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See detailLes spatiocartes en composition colorée
Donnay, Jean-Paul ULiege

in Bulletin de la Société Géographique de Liège (2000), 38

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See detailL’intégration de l’estompage dans les spatiocartes
Donnay, Jean-Paul ULiege

in Bulletin de la Société Géographique de Liège (2000), 38

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See detailSystèmes d’information géographique répartis ou distribués
Donnay, Jean-Paul ULiege

in AM/FM-GIS BELUX News (2000), 17

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See detailNature et qualités de spatiocartes
Donnay, Jean-Paul ULiege

in Bulletin de la Société Géographique de Liège (2000), 38

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See detailLa spatio-cartographie
Donnay, Jean-Paul ULiege

in Bulletin de la Société Géographique de Liège (2000), 38(1),

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See detailLes spatiocartes d'occupation du sol
Binard, Marc ULiege; Donnay, Jean-Paul ULiege

in Bulletin de la Société Géographique de Liège (2000), 38(2000/1), 63-78

Les spatiocartes d'occupation du sol sont dérivées de la classification d'une ou plusieurs images satellite selon une nomenclature conventionnelle des affectations du sol. En importance, elles constituent ... [more ▼]

Les spatiocartes d'occupation du sol sont dérivées de la classification d'une ou plusieurs images satellite selon une nomenclature conventionnelle des affectations du sol. En importance, elles constituent sans doute le second type de spatiocartes le plus couramment produit, après les spatiocartes en composition colorée. Vis-à-vis de ces dernières, les spatiocartes d'occupation du sol relèvent cependant d'une toute autre logique et procèdent d'une méthodologie très différente. La composition colorée est conçue pour laisser au lecteur le soin d'interpréter l'image en fonction de ses propres centres d'intérêt, et les techniques sélectionnées pour son élaboration doivent précisément favoriser la reconnaissance et l'identification visuelle d'un maximum de détails. La spatiocarte d'occupation du sol, par contre, répond à un objectif précis et déterminé a priori. Tout, depuis la sélection des images sources jusqu'à la sélection des couleurs, en passant par le choix de l'échelle et la fixation de la nomenclature, est dicté par une thématique unique. Les méthodes de classification, elles-mêmes, ne sont pas indépendantes de l'objectif poursuivi. Le but de ce chapitre n'est pourtant pas de discourir sur les multiples algorithmes de classification des images. Une très volumineuse littérature, en constante évolution, y est consacrée (Atkinson & Lewis, 2000, Chin-Teng et al., 2000, Simpson et al., 2000). Les méthodes les plus traditionnelles, relevant de l'interprétation d'images assistée par ordinateur, co-existent avec les méthodes les plus récentes, telles les classifications par réseaux de neurones ou les classifications bayesiennes. L'utilisation de l'une ou l'autre méthode, voire de plusieurs en chaîne, se justifie à l'occasion de tel ou tel cas de figure mais elles n'interfèrent guère sur la préoccupation présente qui consiste à transformer une image classée en une carte. On conçoit dès lors que les traitements dont il sera question se situent en aval du processus de classification proprement dit. Quelques considérations seront pourtant émises sur les préalables de la classification et sur la nature et la qualité de l'image classée, dans la mesure où elles peuvent orienter l'élaboration de la spatiocarte. Par contre, les divers traitements relevant de l'habillage ou de l'impression, communs à toute spatiocarte quelle qu'en soit la facture, sont réservés à des chapitres ultérieurs. De même, quelques opérations complexes, susceptibles d'intervenir dans la réalisation de certaines spatiocartes de l'occupation du sol, mais exigeant un bagage méthodologique important, sont développées dans des chapitres spécifiques auxquels nous renverrons le moment venu. [less ▲]

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See detailLa rédaction cartographique des spatiocartes
Donnay, Jean-Paul ULiege; Cornélis, Bernard

in Bulletin de la Société Géographique de Liège (2000), 38

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See detailAn algorithm for the fusion of hill shading with satellite maps
Donnay, Jean-Paul ULiege; Cornélis, Bernard

in Proceedings of the Third International Conference on Fusion of Earth Data (2000)

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See detailReconnaissance des formes urbaines : transfert méthodologique nord-sud (Europe-Afrique)
Collet, Claude; Donnay, Jean-Paul ULiege; Weber, Christiane

in La télédétection en francophonie : analyse critique et perspectives (2000)

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See detailLa télédétection urbaine à l’aube de la très haute résolution
Donnay, Jean-Paul ULiege; Collet, Claude; Waber, Christiane

in La télédétection en francophonie : analyse critique et perspectives (2000)

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See detailPolish – Belgian co-operation. Development of an educational photogrammetric software
Ewiak, Irek; Billen, Roland ULiege; Cornélis, Bernard et al

in Proceedings of the ISPRS 2000 (2000)

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See detailDistribution of the foraging activity of females Antarctic fur seal (Actocephalus Gazella)
Dubroca, Laurent; Guinet, Christophe; Lea, Mary-Anne et al

in Oceanographic factors and prey distribution at Kerguelen island : a two-year comparison (2000)

Detailed reference viewed: 36 (0 ULiège)