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Mapping residential density patterns using multi- temporal Landsat data and decision-tree classifier / S. Mccauley in International Journal of Remote Sensing IJRS, vol 25 n° 6 (March 2004)

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 25 n° 6 (March 2004) . - pp 1077 - 1094 Titre : Mapping residential density patterns using multi- temporal Landsat data and decision-tree classifier Type de document : Article/Communication Auteurs : S. Mccauley, Auteur ; S.J. Goetz, Auteur Année de publication : 2004 Article en page(s) : pp 1077 - 1094 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes descripteurs IGN] analyse discriminante [Termes descripteurs IGN] classification par arbre de décision [Termes descripteurs IGN] densité de population [Termes descripteurs IGN] image Landsat-TM [Termes descripteurs IGN] population urbaine [Termes descripteurs IGN] utilisation du sol Résumé : (Auteur) We examined the utility of Landsat Thematic Mapper (TM) imagery for mapping residential land use in Montgomery County, Maryland, USA. The study area was chosen partly because of the availability of a unique parcel-level database of land use attributes and an associated digital map of parcel boundaries. These data were used to develop a series of land use classifications from a combination of leaf-on and leaf-off TM image derivatives and an algorithm based on 'decision tree' theory. Results suggest potential utility of the approach, particularly to state and local governments for land use mapping and planning applications, but greater accuracies are needed for broad practical application. In general, it was possible to discriminate different densities of residential development, and to separate these from commercial/industrial and agricultural areas. Difficulties arose in the discrimination of low-density residential areas due to the range of land cover types within this specific land use, and their associated spatial variability. The greater classification errors associated with these low-density developed areas were not unexpected. We found that these errors could be mitigated somewhat with techniques that consider the mode of training data selection and by incorporation of methods that account for the presence and amount of impervious surfaces (e.g. pavement and rooftops). Numéro de notice : A2004-085 Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26612 [article]

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Population estimation based on EO [earth observation] data / S. Yang (2004)

Public Titre : Population estimation based on EO [earth observation] data : application to the city of Metz (France) exploiting Spot & Ikonos imagery Type de document : Mémoire Auteurs : S. Yang, Auteur Editeur : Toulouse : Groupement pour le Développement de la Télédétection Aérospatiale GDTA Année de publication : 2004 Importance : 47 p. Format : 21 x 30 cm Note générale : Bibliographie TRISIG course 2004: report to apply for European professional post-graduate diploma in geoinformation [GDTA] & DESS "télédétection : méthodes, applications, environnement" (master's degree) [university of Paris VI] Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes descripteurs IGN] Corrélation linéaire [Termes descripteurs IGN] densité de population [Termes descripteurs IGN] densité du bâti [Termes descripteurs IGN] estimation statistique [Termes descripteurs IGN] image à haute résolution [Termes descripteurs IGN] image à résolution métrique [Termes descripteurs IGN] image Ikonos [Termes descripteurs IGN] image SPOT-HRVIR [Termes descripteurs IGN] Metz (57) [Termes descripteurs IGN] milieu urbain [Termes descripteurs IGN] population urbaine [Termes descripteurs IGN] utilisation du sol Index. décimale : CETEL Mémoires pour le CETEL ou le DESS ou mastère Télédétection Résumé : (Auteur) With rapid developing, RS & GIS have been applied into estimation of urban population. This project has been carried out with the aim to estimate urban population by integrating satellite imagery and census data in Metz, France. By integrating satellite imagery (Ikonos, Spot4) and census data, this project has been carried out to estimate population in urban area of Metz, France, on the basis of determining correlation between population and residential area. In the project, land use in urban area of Metz has been interpreted from lkonos according to the classification system established in this project. Land use in urban area of Metz has been classified into 2 levels and 13 classes. After a photo interpretation of lkonos, an integration of the census data within the obtained land use classes has been done. On the basis of these work, population in urban area of Metz has been estimated by using two methods : 1-Method 1 : Establish linear correlation between census data and building area with the assumption that population density is same on all the building area (City centre, industry & commercial centre, high residential area, middle residential area, low residential area). Population in urban area of Metz has been estimated by using linear correlation. Result shows that mistake rate of estimation is high, and the highest is 65.12%, the lowest is 0.04%, and the average mistake rate is 15.56%. 2- Method 2 : Establish linear correlation between census data and residential area (high dense residential area, middle dense residential area, low dense residential area) with the assumption that people only live in residential area, but not in other building area (city centre, industry & commercial centre). Population estimated from Method 2 is close to the census data, which can be shown by mistake rate. In the mistake rate, the lowest is 0, the highest is between -5.15% --- 1.85%, and the average is nearly 0.28%, which are lower than got from Method 2. Moreover, the distribution of population density estimated is: high residential area > low residential area > middle residential area. Obtained results show that it is possible and reasonable to estimate population by integrating satellite imagery and census data in urban area. So, method of integration of satellite imagery and census data in urban area can be adopted to estimate urban population to provide information for urban planning, natural hazard risk assessment, disaster prevention and response, environmental impact assessment. transportation planning. economic decision-making and evaluation of quality of life. Note de contenu : PART I - INTRODUCTION 1 Project Context 2 Presentation of The Study Area 3 Project Objectives and Methodology 4 Used Data and Software 5 Process and Project Timing ART II - PRECISE LAND USE MAP GENERATION BASED ON IKONOS' EXPLOITATION 1 Data pre processing steps - Image Merging - Subset Study Area 2 Establ M-ment of A Land Use Typology 3 Features Analysis of Classes on Ikonos - City Centre - Industry & Commercial Area - Residential - Transport Centre 4 Photo Interpretation of The lkonos Imagery PART III - INTERPRETATION RESULTS AND ANALYSIS 1 Difference in Residential Area 2 Explanation of Differences - 1 Difference in Satellite Data - 2 Difference in Land Use Themes PART IV- POPULATION ESTIMATATION BASED ON THE METHOD I 1 Presentation of The Method I 2 Prepare Data - Extract Population in Study Area - Extraction of Building Area Over The Study Area - Intersect Population and Building Area 3 Estimate Population in Building Area of Metz - Calculate Building Area - Identify Correlation Between Population and Building Area - Estimate Population in Urban Area of Metz 4 Result Analysis PART V - POPULATION ESTIMATATION BASED ON THE METHOD II 1 Presentation of The Method 11 2 Data Preparation 3 Estimate Population in Residential Area of Metz . - Calculate Residential Area in Each Commune - Correlation Analysis- Determine Relationship Between Area and Population - Estimation of The Population PART VI CONLUSION AND PERSPECTIVES Numéro de notice : 18885 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Mémoire CETEL - DESS Télédétection Organisme de stage : Groupement pour le Développement de la Télédétection Spatiale GDTA (France) Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=50985

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Galileo performance: GPS interoperability and discriminators for urban and indoor environments / M. O'donnell in GPS world, vol 14 n° 6 (June 2003)

Public [article]  inGPS world > vol 14 n° 6 (June 2003) . - pp 38 - 45 Titre : Galileo performance: GPS interoperability and discriminators for urban and indoor environments Type de document : Article/Communication Auteurs : M. O'donnell, Auteur ; T. Watson, Auteur ; J. Fisher, Auteur ; et al., Auteur Année de publication : 2003 Article en page(s) : pp 38 - 45 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes descripteurs IGN] densité de population [Termes descripteurs IGN] Europe (géographie politique) [Termes descripteurs IGN] Galileo [Termes descripteurs IGN] interopérabilité [Termes descripteurs IGN] milieu urbain [Termes descripteurs IGN] population urbaine [Termes descripteurs IGN] positionnement en intérieur [Termes descripteurs IGN] signal Galileo [Termes descripteurs IGN] signal GPS Résumé : (Auteur) A technical study examines potential discriminators for Galileo mass-market acceptance in the presence of a freely available GPS service. This approach seeks to provide commercial input to the Galileo signal design process, to optimize the GPS + Galileo "super constellation" for urban operation over Europe. The analysis further shows that GPS alone does not offer sufficient availability for "transparent" mass-market use in densely populated areas. Copyright Questex Media Group Inc Numéro de notice : A2003-423 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26503 [article]

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Une grille de lecture pour l'analyse des formes du peuplement en Europe : l'apport d'une méthode de lissage par potentiels / E. Dumas in Revue internationale de géomatique, vol 11 n°3-4 (septembre 2001 - février 2002)

Public [article]  inRevue internationale de géomatique > vol 11 n°3-4 (septembre 2001 - février 2002) . - pp 405 - 421 Titre : Une grille de lecture pour l'analyse des formes du peuplement en Europe : l'apport d'une méthode de lissage par potentiels Type de document : Article/Communication Auteurs : E. Dumas, Auteur ; Marianne Guérois, Auteur Année de publication : 2001 Article en page(s) : pp 405 - 421 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes descripteurs IGN] densité de population [Termes descripteurs IGN] données démographiques [Termes descripteurs IGN] Europe (géographie politique) [Termes descripteurs IGN] lissage de données [Termes descripteurs IGN] population Résumé : (Auteur) Cet article présente l'intérêt d'une méthode de lissage par potentiels pour cartographier les formes du peuplement en Europe à plusieurs niveaux d'analyse. L'application de cette méthode à la région transfrontalière franco-belge permet de poser les bases d'une grille de lecture transposable à d'autres espaces européens. Numéro de notice : A2001-177 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21872 [article]

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Development of models for monitoring the urban environment using radar remote sensing / Catherine Ticehurst (1998)

Public Titre : Development of models for monitoring the urban environment using radar remote sensing Type de document : Monographie Auteurs : Catherine Ticehurst, Auteur Editeur : Kensington (Australie) : University of New South Wales Année de publication : 1998 Collection : Reports from School of Geomatic Engineering num. S-54 Importance : 250 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-0-7334-1679-8 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes descripteurs IGN] densité de population [Termes descripteurs IGN] direction de visée [Termes descripteurs IGN] image aérienne [Termes descripteurs IGN] image AIRSAR [Termes descripteurs IGN] image radar [Termes descripteurs IGN] milieu urbain [Termes descripteurs IGN] occupation du sol [Termes descripteurs IGN] polarisation [Termes descripteurs IGN] population urbaine [Termes descripteurs IGN] radar à antenne synthétique [Termes descripteurs IGN] rétrodiffusion [Termes descripteurs IGN] simulation [Termes descripteurs IGN] surveillance de l'urbanisation [Termes descripteurs IGN] télédétection en hyperfréquence Résumé : (Auteur) The world's population is rapidly increasing, especially in urban regions to which many rural inhabitants are migrating. Such an effect results in the need for a more efficient method of monitoring cities, both in developing and developed countries. Present monitoring techniques are inefficient, and unable to effectively maintain up-to date information due to the population increase. Hence, the demand for settlement detection, urban classification and population estimation is apparent. Radar remote sensing is showing great potential for assisting in such a matter. Its ability to discriminate between small buildings of sparse layout, and large, densely spaced, buildings is slowly being realised. This research addresses this issue through the development of a primarily theoretical model. The urban environment is a complex mixture of built as well as natural elements. In order to simplify such a difficult situation, the backscatter expected from urban areas can be divided into simple scattering mechanisms. The most important ones chosen for this research are double bounce (from building walls and tree trunks), single bounce (from building roofs), and volume scattering (from tree canopies). The model has been designed to consider these scattering mechanisms, and their expected proportions, occurring in the urban environment. One of the greatest difficulties created through using radar in the built environment, is due to the 'Cardinal Effect'. This occurs when there is strong double bounce scattering due to the intersection of the orthogonal building wall and ground surface being perpendicular to the look direction. An empirical investigation is conducted in the thesis to further understand this phenomenon. In order to develop the model, many parameters, including those relating to the cardinal effect, need to be considered. Determination of such parameters is not a simple task, and requires some general assumptions to be made. The model has been designed to determine the backscatter and polarisation information for two different urban classes (ie., residential and commercial). These classes are chosen because they generally represent the low and high density urban areas respectively. The backscatter and polarisation information from a single building is developed and then expanded into a block of buildings, with consideration of radar shadowing effects. Trees are also included in the simulated residential areas. In order to test the accuracy of the model for residential and commercial land use, test sites representing a large range of orientation and look angles, are chosen in the city of Sydney, Australia. AirSAR data for these test sites are compared to model simulations representing the same characteristics. The results show that L-band model output is quite comparable with the real data. The P-and C-band are less reliable, with the model C-band results showing little resemblance to the AirSAR information. For the model to be further tested, a simple classification is performed over a large area of the Eastern suburbs of Sydney. L-band data is used due to the model simulations closely represerding real data. Furthermore, the real P-, L- and C-band polarisation information were found to be quite similar, so a multiwavelength classification using radar data was not seen to contribute significant information compared to a single band. The classification is based on a comparison between the model and AirSAR total power, polarisation index and polarisation phase difference. The classification shows that the model has the ability to distinguish between low and high density urbw areas. However, due to the difficulties in defining the characteristics of residential and commercial land uses, there is some overlap in the classification. Some tall, dense residential areas are classified as commercial. Similarly small scale commercial areas are classified to be residential. Such a problem is related to the definition of land use rather than land cover. The most important classification parameter observed through this exercise is the total power. The polarisation index proved of little use due to its incapability of distinguishing between residential and commercial classes for the real data. Classification using the total power and polarisation phase difference together gave a less accurate result than total power alone. However, overall results show that the potential which radar has as a remote sensing tool for distinguishing between low and high density urban areas, and for classification (under the appropriate circumstances), is quite high. This is especially so when radar is combined with other information gathering systems, such as optical remotely sensed data. Such a combination could be very beneficial for the growing need for urban monitoring and population estimation. Numéro de notice : 67410 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=61751

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Occupation du sol et densités urbaines / N. Zamani (1995)

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Land use and land cover data and the mapping of population density / Mark Monmonier in Annuaire international de cartographie, n° 24 (1984)

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The cartographic representation of the statistical surface / Arthur H. Robinson in Annuaire international de cartographie, n° 1 (1961)

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