Mention de date : may 2007 Paru le : 01/05/2007 ISBN/ISSN/EAN : 1365-8816 | ![]() |
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Exemplaires(2)
Code-barres | Cote | Support | Localisation | Section | Disponibilité |
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079-07031 | RAB | Revue | Centre de documentation | En réserve L003 | Disponible |
079-07032 | RAB | Revue | Centre de documentation | En réserve L003 | Disponible |
Dépouillements


Modelling landscape dynamics with Python / D. Karssenberg in International journal of geographical information science IJGIS, vol 21 n° 5 (may 2007)
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[article]
Titre : Modelling landscape dynamics with Python Type de document : Article/Communication Auteurs : D. Karssenberg, Auteur ; K. de Jong, Auteur ; J. Van Der Kwast, Auteur Année de publication : 2007 Article en page(s) : pp 483 - 495 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique
[Termes IGN] calcul matriciel
[Termes IGN] données maillées
[Termes IGN] méthode de Monte-Carlo
[Termes IGN] modèle dynamique
[Termes IGN] modélisation 3D
[Termes IGN] propagation d'erreur
[Termes IGN] Python (langage de programmation)
[Termes IGN] simulation
[Termes IGN] visualisation de donnéesRésumé : (Auteur) A new tool for construction of models is presented that allows earth scientists without specialist knowledge in programming to convert theories to numerical computer models simulating landscape change through time. This tool, referred to as the PCRaster Python library, consists of: (1) the standard Python programming language, which is a generic, interpreted scripting language, supporting object oriented programming; (2) a large set of spatial and temporal functions on raster maps that are embedded in the Python language as an extension; (3) a framework provided as a Python class to construct and run iterative temporal models and to calculate error propagation with Monte Carlo simulation; and (4) visualization routines to display spatio-temporal data read and written by this framework. Python is a high-level programming language, and users of the tool do not have to be specialist computer programmers. Users of the PCRaster Python library can take advantage of several other Python libraries, such as extensions for matrix algebra and for modelling in three spatial dimensions. Copyright Taylor & Francis Numéro de notice : A2007-132 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810601063936 En ligne : https://doi.org/10.1080/13658810601063936 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28495
in International journal of geographical information science IJGIS > vol 21 n° 5 (may 2007) . - pp 483 - 495[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-07031 RAB Revue Centre de documentation En réserve L003 Disponible 079-07032 RAB Revue Centre de documentation En réserve L003 Disponible A probabilistic framework for representing and simulating uncertain environmental variables / Gerard B.M. Heuvelink in International journal of geographical information science IJGIS, vol 21 n° 5 (may 2007)
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[article]
Titre : A probabilistic framework for representing and simulating uncertain environmental variables Type de document : Article/Communication Auteurs : Gerard B.M. Heuvelink, Auteur ; J. Brown, Auteur ; E. Emiel Van Loon, Auteur Année de publication : 2007 Article en page(s) : pp 497 - 513 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Information géographique
[Termes IGN] distribution, loi de
[Termes IGN] incertitude d'attribut
[Termes IGN] incertitude de position
[Termes IGN] incertitude des données
[Termes IGN] modèle stochastique
[Termes IGN] simulationRésumé : (Auteur) Understanding the limitations of environmental data is important for managing environmental systems effectively and for encouraging the responsible use of uncertain data. Explicit assessment of the uncertainties associated with environmental data, and their storage in a database, are therefore important. This paper presents a statistical framework for representing and simulating uncertain environmental variables. In general terms, an uncertain variable is completely specified by its probability distribution function (pdf). Pdfs are developed for objects with uncertain locations ('positional uncertainty') and uncertain attribute values ('attribute uncertainty'). Objects comprising multiple space-time locations are separated into 'rigid objects', where positional uncertainty cannot alter the internal geometry of the object, and 'deformable' objects, where positional uncertainty can vary between locations in one object. Statistical dependence is allowed between uncertainties in multiple locations in one object. The uncertainties associated with attribute values are also modelled with pdfs. The type and complexity of these pdfs depend upon the measurement scale and the space-time variability of the uncertain attribute. The framework is illustrated with examples. A prototype software tool for assessing uncertainties in environmental data, storing them within a database, and for generating realizations for use in Monte Carlo studies is also presented. Copyright Taylor & Francis Numéro de notice : A2007-133 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810601063951 En ligne : https://doi.org/10.1080/13658810601063951 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28496
in International journal of geographical information science IJGIS > vol 21 n° 5 (may 2007) . - pp 497 - 513[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-07031 RAB Revue Centre de documentation En réserve L003 Disponible 079-07032 RAB Revue Centre de documentation En réserve L003 Disponible Interactive visualization of uncertain spatial and spatio-temporal data under different scenarios: an air quality example / Edzer J. Pebesma in International journal of geographical information science IJGIS, vol 21 n° 5 (may 2007)
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[article]
Titre : Interactive visualization of uncertain spatial and spatio-temporal data under different scenarios: an air quality example Type de document : Article/Communication Auteurs : Edzer J. Pebesma, Auteur ; K. de Jong, Auteur ; D.J. Briggs, Auteur Année de publication : 2007 Article en page(s) : pp 515 - 527 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Information géographique
[Termes IGN] analyse comparative
[Termes IGN] données spatiotemporelles
[Termes IGN] incertitude des données
[Termes IGN] méthode de Monte-Carlo
[Termes IGN] qualité de l'air
[Termes IGN] Union Européenne
[Termes IGN] visualisation dynamiqueRésumé : (Auteur) This paper introduces a method for visually exploring spatio-temporal data or predictions that come as probability density functions, e.g. output of statistical models or Monte Carlo simulations, under different scenarios. For a given moment in time, we can explore the probability dimension by looking at maps with cumulative or exceedance probability while varying the attribute level that is exceeded, or by looking at maps with quantiles while varying the probability value. Scenario comparison is done by arranging the maps in a lattice with each panel reacting identically to legend modification, zooming, panning, or map querying. The method is illustrated by comparing different modelling scenarios for yearly NO2 levels in 2001 across the European Union. Copyright Taylor & Francis Numéro de notice : A2007-134 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810601064009 En ligne : https://doi.org/10.1080/13658810601064009 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28497
in International journal of geographical information science IJGIS > vol 21 n° 5 (may 2007) . - pp 515 - 527[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-07031 RAB Revue Centre de documentation En réserve L003 Disponible 079-07032 RAB Revue Centre de documentation En réserve L003 Disponible Estimating spatial patterns of rainfall interception from remotely sensed vegetation indices and spectral mixture analysis / S.M. de Jong in International journal of geographical information science IJGIS, vol 21 n° 5 (may 2007)
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[article]
Titre : Estimating spatial patterns of rainfall interception from remotely sensed vegetation indices and spectral mixture analysis Type de document : Article/Communication Auteurs : S.M. de Jong, Auteur ; V.G. Jetten, Auteur Année de publication : 2007 Article en page(s) : pp 529 - 545 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] analyse des mélanges spectraux
[Termes IGN] érosion hydrique
[Termes IGN] évapotranspiration
[Termes IGN] image HYMAP
[Termes IGN] image hyperspectrale
[Termes IGN] indice de végétation
[Termes IGN] Leaf Area Index
[Termes IGN] pluie
[Termes IGN] ruissellementRésumé : (Auteur) Rainfall interception by vegetation is an important factor in the water balance. Consequently, rainfall interception should also be an important factor in models simulating processes such as evaporation, transpiration, surface runoff, soil erosion, and crop growth. In practice, however, it is difficult to make quantitative assessments of the spatial and temporal distribution of rainfall interception loss at the catchment level, for instance, and to make these values available as model input. In this paper, we present a novel method using earth observation images to estimate local quantitative values of rainfall interception loss. Leaf Area Index (LAI) and fractional vegetation cover per grid cell are important process variables for rainfall interception. These two variables are estimated from images using spectral vegetation indices and using spectral mixture analysis, respectively. Relations between canopy storage capacity and LAI exist for several plant species and vegetation types, but limited data are found on crops, and more research is needed in this field. The new method is explained and illustrated for a study area in southern France with a variety of land-cover types. It is found to be a valuable and practical approach to quantitatively assess spatial patterns of interception loss for given rainfall events. Copyright Taylor & Francis Numéro de notice : A2007-135 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/13658810601064884 En ligne : https://doi.org/10.1080/13658810601064884 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28498
in International journal of geographical information science IJGIS > vol 21 n° 5 (may 2007) . - pp 529 - 545[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-07031 RAB Revue Centre de documentation En réserve L003 Disponible 079-07032 RAB Revue Centre de documentation En réserve L003 Disponible Spatial-temporal specific neighbourhood rules for cellular automata land-use modelling / Stan Geertman in International journal of geographical information science IJGIS, vol 21 n° 5 (may 2007)
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[article]
Titre : Spatial-temporal specific neighbourhood rules for cellular automata land-use modelling Type de document : Article/Communication Auteurs : Stan Geertman, Auteur ; M. Hagoort, Auteur ; Henk F.L. Ottens, Auteur Année de publication : 2007 Article en page(s) : pp 547 - 568 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] analyse diachronique
[Termes IGN] automate cellulaire
[Termes IGN] carte d'occupation du sol
[Termes IGN] Kappa de Cohen
[Termes IGN] modélisation spatiale
[Termes IGN] occupation du sol
[Termes IGN] simulation
[Termes IGN] spatial metrics
[Termes IGN] voisinage (relation topologique)Résumé : (Auteur) This paper explores the necessity of using spatial-temporal specific neighbourhood rules for simulation of urban dynamics at a regional level with the help of a Cellular Automata (CA) land-use model (Environment Explorer). Moreover, it explores a method for formulating these spatial-temporal specific neighbourhood rules. Therein, spatial metrics originating from the field of landscape ecology prove to be very useful, in particular the so-called enrichment factor. Analysis of historical data with the help of these spatial metrics revealed evidence of substantial differences in land-use developments between time periods and regions, for example, differences that should be incorporated in land-use models if applied on a more detailed regional scale. In a case study, micro-scale land-use data incorporated in a CA-model were used to analyse and simulate the urban morphological changes over two time periods in four urban regions in the Netherlands. In this study, regional and time-specific neighbourhood rules performed significantly better than a set of generic neighbourhood rules. In contrast, within current practice, most CA land-use modelling makes use of only one uniform set of neighbourhood rules for performing both large area and regional scale land-use simulations. This study questions this common practice and puts it into perspective. Moreover, it indicates some restrictions in the proposed regionalization of the neighbourhood rules; one which is particularly noteworthy is its time-specific dependency of local developments and circum--stances. Copyright Taylor & Francis Numéro de notice : A2007-136 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810601064892 En ligne : https://doi.org/10.1080/13658810601064892 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28499
in International journal of geographical information science IJGIS > vol 21 n° 5 (may 2007) . - pp 547 - 568[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-07031 RAB Revue Centre de documentation En réserve L003 Disponible 079-07032 RAB Revue Centre de documentation En réserve L003 Disponible Patterns in soil quality: Natural geochemical variability versus anthropogenic impact in soils of Zeeland, The Netherlands / P.F.M. Van Gaans in International journal of geographical information science IJGIS, vol 21 n° 5 (may 2007)
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[article]
Titre : Patterns in soil quality: Natural geochemical variability versus anthropogenic impact in soils of Zeeland, The Netherlands Type de document : Article/Communication Auteurs : P.F.M. Van Gaans, Auteur ; J. Spijker, Auteur ; S.P. Vriend, Auteur ; J.N. de Jong, Auteur Année de publication : 2007 Article en page(s) : pp 569 - 587 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] anthropisation
[Termes IGN] Argile
[Termes IGN] carte géologique
[Termes IGN] contamination
[Termes IGN] état du sol
[Termes IGN] géochimie
[Termes IGN] géostatistique
[Termes IGN] impact sur l'environnement
[Termes IGN] Pays-Bas
[Termes IGN] roche sédimentaire
[Termes IGN] sous-solRésumé : (Auteur) We demonstrate a structured approach to identify natural as well as anthropogenic geochemical patterns in sedimentary soils, using statistical techniques that increase in complexity and the requirements for auxiliary data. Comparison with the average upper continental crust identified natural regional features, such as a relative enrichment of As, due to a low-lying deltaic environment, and of Cr and Zr, related to a specific heavy mineral association. Identification of diffuse contamination is best achieved by comparison with a local reference. The Zeeland subsoil is shown to have undergone only minor anthropogenic influence and to serve this purpose very well. A topsoil-subsoil comparison revealed anthropogenic enrichments for Cd, Cu, P, Pb, S, Sb, Sn, Zn, and partly for As, while typically 'non-anthropogenic' trace elements like Cs, Ga, La, and Rb were found not to be enriched. Except for P and S, the enriched components show a good correlation with Al2Oi, a proxy for clay mineralogy, and a bivariate topsoil-subsoil comparison is made using a trimmed Reduced Major Axis regression. Two subregions are identified with different associations (Zn, Pb, and Cd, versus As, Cd, Cu, and Sn) of higher-than-average enrichments. Copyright Taylor & Francis Numéro de notice : A2007-137 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810601064900 En ligne : https://doi.org/10.1080/13658810601064900 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28500
in International journal of geographical information science IJGIS > vol 21 n° 5 (may 2007) . - pp 569 - 587[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-07031 RAB Revue Centre de documentation En réserve L003 Disponible 079-07032 RAB Revue Centre de documentation En réserve L003 Disponible The use of GIS in reconstructing the Holocene palaeogeography of the Rhine–Meuse delta, The Netherlands / H.J. Berendsen in International journal of geographical information science IJGIS, vol 21 n° 5 (may 2007)
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[article]
Titre : The use of GIS in reconstructing the Holocene palaeogeography of the Rhine–Meuse delta, The Netherlands Type de document : Article/Communication Auteurs : H.J. Berendsen, Auteur ; K.M. Cohen, Auteur ; E. Stouthamer, Auteur Année de publication : 2007 Article en page(s) : pp 589 - 602 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] delta
[Termes IGN] Holocène
[Termes IGN] Meuse (rivière)
[Termes IGN] paléogéographie
[Termes IGN] Pays-Bas
[Termes IGN] plaine
[Termes IGN] Rhin (bassin)Résumé : (Auteur) In Holocene palaeogeographical studies, GIS nowadays is used in various ways, embracing either GIS modelling possibilities or GIS spatial data storage functionality. This paper is an example of the latter type of GIS use for reconstruction of the Holocene Rhine-Meuse delta (128x75 km; part of the Dutch coastal plain). Depositional traces of river courses (channel belts) are major features to map. We digitized mapped channel belt fragments and stored their reconstructed ages in a linked table. The GIS data structure allows checking for internal consistency of the implemented reconstruction, enabling iterative improvement while digitizing and labelling. Palaeogeographical maps for any given time during the Holocene result from GIS-database queries. Coupled to the GIS are high-resolution digital elevation data (sub-decimetre accurate laser-altimetry data covering the entire study area) and a database of ca 100000 borehole descriptions, allowing for further mapping improvements. The GIS structure and digital data together greatly improved mapping and enable larger areas to be mapped in greater detail with greater accuracy and in less time. Copyright Taylor & Francis Numéro de notice : A2007-138 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810601064918 En ligne : https://doi.org/10.1080/13658810601064918 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28501
in International journal of geographical information science IJGIS > vol 21 n° 5 (may 2007) . - pp 589 - 602[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-07031 RAB Revue Centre de documentation En réserve L003 Disponible 079-07032 RAB Revue Centre de documentation En réserve L003 Disponible