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Spatial patterns and eco-epidemiological systems – part 1: multi-scale spatial modelling of the occurrence of Chagas disease insect vectors / Emmanuel Roux in Geospatial Health, vol 6 n° 1 (November 2011)
[article]
Titre : Spatial patterns and eco-epidemiological systems – part 1: multi-scale spatial modelling of the occurrence of Chagas disease insect vectors Type de document : Article/Communication Auteurs : Emmanuel Roux, Auteur ; Annamaria de Fátima Venâncio, Auteur ; Jean-François Girres , Auteur ; Christine A. Romaña, Auteur Année de publication : 2011 Article en page(s) : pp 41 - 51 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] analyse en composantes principales
[Termes IGN] autocorrélation spatiale
[Termes IGN] Bahia (Brésil)
[Termes IGN] épidémie
[Termes IGN] Insecta
[Termes IGN] maladie parasitaire
[Termes IGN] matriceRésumé : (auteur) Studies that explicitly and specifically take into account the spatial dimension within the study of eco-epidemiological systems remain rare. Our approach of modelling the spatial and/or temporal properties of the entomological and/or epidemiological data before their mapping with possible explanatory variables, objectively underline the significant patterns at different scales. The domiciliary and peri-domiciliary presence and abundance of juvenile and adult vectors of the Chagas disease (Triatoma sordida and Panstrongylus geniculatus) in Bahia state in northeast Brazil, has been modelled by automatically identifying significant multi-scale spatial patterns of the entomological data by the application and adaptation of the spatial modelling methodology proposed by Dray et al. (2006) and based on principal coordinate analysis of neighbour matrices. We found that entomological data can be modelled by a set of eigenvectors that present a significant Moran’s I index of spatial autocorrelation. The models for juvenile and adult vectors are defined by 28 and 32 eigenvectors that explain 82.3% and 79.9%, respectively, of the total data variances. The results support insect presence as the outcome both of a local scale “near-to-near” dispersal and an infestation from the wild, surrounding environment that produces a higher insect density at the village periphery. Numéro de notice : A2011-605 Affiliation des auteurs : COGIT+Ext (1988-2011) Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.4081/gh.2011.156 Date de publication en ligne : 01/11/2011 En ligne : https://doi.org/10.4081/gh.2011.156 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91682
in Geospatial Health > vol 6 n° 1 (November 2011) . - pp 41 - 51[article]Spatial patterns and eco-epidemiological systems – part 2: multi-scale spatial modelling of the occurrence of Chagas disease insect vectors / Emmanuel Roux in Geospatial Health, vol 6 n° 1 (November 2011)
[article]
Titre : Spatial patterns and eco-epidemiological systems – part 2: multi-scale spatial modelling of the occurrence of Chagas disease insect vectors Type de document : Article/Communication Auteurs : Emmanuel Roux, Auteur ; Annamaria de Fátima Venâncio, Auteur ; Jean-François Girres , Auteur ; Christine A. Romaña, Auteur Année de publication : 2011 Article en page(s) : pp 53 - 64 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] analyse en composantes principales
[Termes IGN] autocorrélation spatiale
[Termes IGN] Bahia (Brésil)
[Termes IGN] épidémie
[Termes IGN] Insecta
[Termes IGN] maladie parasitaire
[Termes IGN] matriceRésumé : (auteur) While the former part of this back-to-back paper dealt with the identification of multi-scale spatial patterns associated with the presence, abundance and dispersion of the insect vectors (Triatominae) of Chagas disease, this latter part examines the need for pattern characterisation by means of detailed data on environmental, residential, peri-domiciliary and human behaviour. The study site was, in both cases, a single village situated in Bahia, Brazil, wherefrom the data were collected through field observation and a standardised questionnaire, while the environmental characteristics were derived from satellite images and landscape characterisation. Following this, factorial analysis of mixed group (FAMG), an exploratory data analysis method, was applied to “mine” the huge dataset in a hierarchical way and to evaluate the relative impact of different factors such as the surrounding environment, the domiciliary/peri-domiciliary space properties and the presence of domestic animals. In the study village, five principal “districts” associated with different possible causes of infestation were identified. The results favour the role of depressions of the ground surface due to collapse of karstic subsoil (dolines) and open rock faces as infestation sources, vector attraction by outdoor lighting, risk of insect domiciliation in dwellings constructed without finishing materials and associated with apparent disorder. Ultimately, this study not only provides the basic information needed for decision-making and specification of vector control in the study village, but offers also a knowledge-base for more general control strategies in the region. Numéro de notice : A2011-606 Affiliation des auteurs : COGIT+Ext (1988-2011) Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.4081/gh.2011.157 Date de publication en ligne : 01/11/2011 En ligne : https://doi.org/10.4081/gh.2011.157 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91683
in Geospatial Health > vol 6 n° 1 (November 2011) . - pp 53 - 64[article]Discrimination of agricultural crops in a tropical semi-arid region of Brazil based on L-band polarimetric airborne SAR data / W. Silva in ISPRS Journal of photogrammetry and remote sensing, vol 64 n° 5 (September - October 2009)
[article]
Titre : Discrimination of agricultural crops in a tropical semi-arid region of Brazil based on L-band polarimetric airborne SAR data Type de document : Article/Communication Auteurs : W. Silva, Auteur ; B. Rudorff, Auteur ; A. Formaggio, Auteur ; W. Paradella, Auteur ; J. Mura, Auteur Année de publication : 2009 Article en page(s) : pp 458 - 463 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] Amérique tropicale
[Termes IGN] analyse discriminante
[Termes IGN] Bahia (Brésil)
[Termes IGN] bande L
[Termes IGN] classificateur
[Termes IGN] Coffea (genre)
[Termes IGN] cultures
[Termes IGN] Gossypium (genre)
[Termes IGN] image aérienne
[Termes IGN] image radar moirée
[Termes IGN] milieu tropical
[Termes IGN] polarimétrie radar
[Termes IGN] polarisation
[Termes IGN] prise en compte du contexte
[Termes IGN] rétrodiffusion
[Termes IGN] zone intertropicale
[Termes IGN] zone semi-arideRésumé : (Auteur) Recent articles are indicating that polarimetric data provide significantly more information than conventional or multi-polarized images, particularly due to the additional phase information. The objective of this paper is to evaluate the multi-polarized and fully polarimetric L-band airborne SAR-R99B data, in terms of their capability to distinguish among different agricultural crops in the western part of Bahia State, Brazil. Emphasis was given to coffee, cotton and pasture crops which were at well developed growing stages. Discrimination among crops was carried out using graphical analysis of mean backscatter values. Crop classification was performed for single and multiple polarizations, and fully polarimetric images with a classifier that uses the contextual Iterated Conditional Modes–ICM algorithm. The investigation confirmed the potential of L-band multi-polarized and polarimetric airborne SAR-R99B data to distinguish and classify agricultural crops in the tropical condition of the test-site. In addition, it clearly indicated the gradual and considerable improvement that was achieved going from single to three polarizations and from multi-polarized to fully polarimetric images. Copyright ISPRS Numéro de notice : A2009-398 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2008.07.005 En ligne : https://doi.org/10.1016/j.isprsjprs.2008.07.005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30029
in ISPRS Journal of photogrammetry and remote sensing > vol 64 n° 5 (September - October 2009) . - pp 458 - 463[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 081-09051 SL Revue Centre de documentation Revues en salle Disponible GIS projects in Brazil: present situation, difficulties and trends / G. Corso in GIM international, vol 13 n° 9 (September 1999)
[article]
Titre : GIS projects in Brazil: present situation, difficulties and trends Type de document : Article/Communication Auteurs : G. Corso, Auteur Année de publication : 1999 Article en page(s) : pp 37 - 39 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique
[Termes IGN] Bahia (Brésil)
[Termes IGN] Brésil
[Termes IGN] milieu urbain
[Termes IGN] système d'information géographique
[Termes IGN] villeRésumé : (Editeur) The use of GIS technologies in Bahia, one of the most important states in Brazil, is interesting for organisations operating in the field of management of urban and rural areas. However, the progress and success rate of GIS projects is slow, mainly because of lack of knowledge, human resources and digital data. In order to accelerate progress, the REBATE project was initiated, aimed at sharing knowledge, resources and spatial data among several organisations. Numéro de notice : A1999-149 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26348
in GIM international > vol 13 n° 9 (September 1999) . - pp 37 - 39[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 061-99091 RAB Revue Centre de documentation En réserve L003 Disponible Essais de compositions colorées pour l'étude des paysages (images Landsat, sud-Bahia, Brésil) / Jean Tricart in Photo interprétation, vol 1981 n° 6 (Novembre 1981)
[article]
Titre : Essais de compositions colorées pour l'étude des paysages (images Landsat, sud-Bahia, Brésil) Type de document : Article/Communication Auteurs : Jean Tricart, Auteur ; D. Blumenroeder, Auteur Année de publication : 1981 Article en page(s) : pp 1 - 8 Langues : Français (fre) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] Bahia (Brésil)
[Termes IGN] composition colorée
[Termes IGN] flore locale
[Termes IGN] forêt
[Termes IGN] géomorphologie locale
[Termes IGN] image en couleur composée
[Termes IGN] image Landsat
[Termes IGN] sédimentNuméro de notice : A1981-040 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=23563
in Photo interprétation > vol 1981 n° 6 (Novembre 1981) . - pp 1 - 8[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 104-81061 SL Revue Centre de documentation Revues en salle Disponible