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A six-camera digital video imaging system sensitive to visible, red edge, near-infrared, and mid-infrared wavelengths / R.S. Fletcher in Geocarto international, vol 22 n° 2 (June - August 2007)  

Public [article]  inGeocarto international > vol 22 n° 2 (June - August 2007) . - pp 75 - 86 Titre : A six-camera digital video imaging system sensitive to visible, red edge, near-infrared, and mid-infrared wavelengths Type de document : Article/Communication Auteurs : R.S. Fletcher, Auteur ; James H. Everitt, Auteur Année de publication : 2007 Article en page(s) : pp 75 - 86 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] caméra numérique [Termes IGN] capteur imageur [Termes IGN] image multibande [Termes IGN] image vidéo [Termes IGN] rayonnement infrarouge [Termes IGN] rayonnement lumineux [Termes IGN] vidéo numérique Résumé : (Auteur) This paper describes a six-camera multispectral digital video imaging system designed for natural resource assessment and shows its potential as a research tool. It has five visible to near-infrared light sensitive cameras, one near-infrared to mid-infrared light sensitive camera, a monitor, a computer with a multichannel digitizing board, a keyboard, a power distributor, an amplifier, and a mouse. Each camera is fitted with a narrowband interference filter, allowing the system to obtain imagery in the blue (447 - 455 nm), green (555 - 565 nm), red (625 - 635 nm), red edge (704 - 716 nm), near-infrared (814-826 nm), and mid-infrared (1631 - 1676 nm) regions of the electromagnetic spectrum. Analogue video acquired by this system is converted to digital format. Radiometric resolution of the imagery is 8-bit (pixel values range 0 - 255). Images obtained by the system can be evaluated individually and/or in combination with each other to assess natural resources. Copyright Taylor & Francis Numéro de notice : A2007-458 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106040701201608 Date de publication en ligne : 18/06/2007 En ligne : https://doi.org/10.1080/10106040701201608 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28821 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
059-07021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Ecotourism planning using multiple criteria evaluation with GIS / T. Fung in Geocarto international, vol 22 n° 2 (June - August 2007)  

Public [article]  inGeocarto international > vol 22 n° 2 (June - August 2007) . - pp 87 - 105 Titre : Ecotourism planning using multiple criteria evaluation with GIS Type de document : Article/Communication Auteurs : T. Fung, Auteur ; F. Wong, Auteur Année de publication : 2007 Article en page(s) : pp 87 - 105 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] analyse multicritère [Termes IGN] Hong-Kong [Termes IGN] image à résolution métrique [Termes IGN] image Ikonos [Termes IGN] patrimoine culturel [Termes IGN] patrimoine naturel [Termes IGN] système d'information géographique [Termes IGN] tourisme Résumé : (Auteur) Hong Kong as an international metropolis is well known for its vibrant urban life, which attracts millions of mass conventional tourists for shopping and business. Recently, ecotourism has flourished and attracts ecotourists who visit the ecological and cultural resources of the rural landscape, country parks and marine parks. Yan Chau Tong, also known as 'Double Haven', is remote from the urban centre, which helps preserve its natural flavour and cultural heritages such as Hakka walled villages. It is noted as an important site for developing ecotourist activities. A symbiosis of humans and nature cannot be achieved without a sound planning and zoning scheme. This paper investigates the use of IKONOS imagery and a geographic information system for rational planning of ecotourist activities and conservation measures. Through image classification of IKONOS and integrated with ecological data, essential habitats can be mapped and a spatial database is established. Suitable sites for recreational activities (including camping, heritage visiting, hiking and snorkelling) and important ecological habitats can both be identified using multiple criteria evaluation techniques. The use of a multiple objective land allocation model helps resolve conflict between recreation and conservation. Sites are generally identified as (a) those where conservation or recreation should receive the highest priority; (b) those that can be treated as additional recreation or conservation sites; and (c) conflict areas that can serve both purposes. The result can assist in planning land resources for ecotourism to satisfy both objectives and attain sustainability in the area. Copyright Taylor & Francis Numéro de notice : A2007-459 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106040701207332 Date de publication en ligne : 18/06/2007 En ligne : https://doi.org/10.1080/10106040701207332 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28822 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
059-07021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Monitoring cross-border trails using airborne digital multispectral imagery and interactive image analysis techniques / L. Cao in Geocarto international, vol 22 n° 2 (June - August 2007)  

Public [article]  inGeocarto international > vol 22 n° 2 (June - August 2007) . - pp 107 - 125 Titre : Monitoring cross-border trails using airborne digital multispectral imagery and interactive image analysis techniques Type de document : Article/Communication Auteurs : L. Cao, Auteur ; D. Stow, Auteur ; J. Kaiser, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 107 - 125 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] analyse en composantes principales [Termes IGN] Californie (Etats-Unis) [Termes IGN] frontière [Termes IGN] image ADAR [Termes IGN] image aérienne [Termes IGN] image multibande [Termes IGN] immigration [Termes IGN] Mexique [Termes IGN] sentier Résumé : (Auteur) The objective of this study was to evaluate image-based procedures for monitoring cross-border foot trails in the US - Mexico border zone in eastern San Diego County using airborne remote sensing techniques. Specifically, digital multi-spectral and multi-temporal imagery from an airborne digital multi-spectral imaging system, digital image processing, and visual image analysis techniques were explored in the context of detecting and delineating new trail features and updating trail GIS layers. Three trail updating approaches: map-to-image (M-I) overlay, map and image-to-image (M/I-I) differencing, map and image-to-image (M/I-I) swiping and two types of spectral transform, PCA and NDVI, were tested and compared. The M-I overlay was found to be the most reliable trail updating approach. The optimal image enhancement method for the M-I overlay approach varied with vegetation structure. PCA imagery yielded better results than NDVI imagery in a highly disturbed area and NDVI imagery performed better in a densely vegetated area. The M/I-I swiping approach was useful for distinguishing misregistered extant trails from new trail features. Copyright Taylor & Francis Numéro de notice : A2007-460 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106040701204073 Date de publication en ligne : 18/06/2007 En ligne : https://doi.org/10.1080/10106040701204073 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28823 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
059-07021	RAB	Revue	Centre de documentation	En réserve L003	Disponible