Photogrammetric Engineering & Remote Sensing, PERS / American society for photogrammetry and remote sensing . vol 70 n° 4Paru le : 01/04/2004 ISBN/ISSN/EAN : 0099-1112 |
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Ajouter le résultat dans votre panierAn initial study on automatic reconstruction of ground DEMs from airborne IfSAR DSMs / Y. Zhang in Photogrammetric Engineering & Remote Sensing, PERS, vol 70 n° 4 (April 2004)
[article]
Titre : An initial study on automatic reconstruction of ground DEMs from airborne IfSAR DSMs Type de document : Article/Communication Auteurs : Y. Zhang, Auteur ; C. Vincent Tao, Auteur ; J.B. Mercer, Auteur Année de publication : 2004 Article en page(s) : pp 427 - 438 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] interféromètrie par radar à antenne synthétique
[Termes IGN] milieu urbain
[Termes IGN] modèle numérique de surfaceRésumé : (Auteur) The demands for ground digital elevation models (DEMs) have been increasing rapidly. Many modern mapping technologies, such as lidar scanning, interferometric SAR (IfSAR), and stereo image matching, are capable of generating digital surface models (DSMs) directly. Research on deriving DEMs from DSMs is a topical area. Airborne IfSAR technology has been in commercial operation since 1996. However, it is still technically challenging to automate the process of generating DEMs from IfSAR DSMs. The lack of scientific studies in this area is mainly caused by the sensitivity and availability of commercial IfSAR data. In this study, researchers have been working with the commercial IfSAR system developer to perform an initial study on automatic reconstruction of ground DEMsfrom IfSAR DSMs. This paper presents a compact and yet efficient version of our developed approach. This approach has been tested by using many IfSAR DSMs in different hilly urban areas with light and moderate variations in relief. An accuracy analysis of the reconstructed ground DEMs against the laser DSMs and DEMs has also been performed to test the reliability and efficiency of our approach. Numéro de notice : A2004-119 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.70.4.427 En ligne : https://doi.org/10.14358/PERS.70.4.427 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26646
in Photogrammetric Engineering & Remote Sensing, PERS > vol 70 n° 4 (April 2004) . - pp 427 - 438[article]The characteristics and interpretability of land surface change and implications for project design / T.L. Sohl in Photogrammetric Engineering & Remote Sensing, PERS, vol 70 n° 4 (April 2004)
[article]
Titre : The characteristics and interpretability of land surface change and implications for project design Type de document : Article/Communication Auteurs : T.L. Sohl, Auteur ; A.L. Gallant, Auteur ; T.R. Loveland, Auteur Année de publication : 2004 Article en page(s) : pp 439 - 448 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photo-interprétation
[Termes IGN] classification automatique d'objets
[Termes IGN] détection de changement
[Termes IGN] occupation du sol
[Termes IGN] photo-interprétation
[Termes IGN] photo-interprétation assistée par ordinateurRésumé : (Auteur) The need for comprehensive, accurate information on landcover change has never been greater. While remotely sensed imagery affords the opportunity to provide information on land-cover change over large geographic expanses at a relatively low cost, the characteristics of land-surface change bring into question the suitability of many commonly used methodologies. Algorithm-based methodologies to detect change generally cannot provide the same level of accuracy as the analyses done by human interpreters. Results from the Land Cover Trends project, a cooperative venture that includes the U.S. Geological Survey, Environmental Protection Agency, and National Aeronautics and Space Administration, have shown that land-cover conversion is a relatively rare event, occurs locally in small patches, varies geographically and temporally, and is spectrally ambiguous. Based on these characteristics of change and the type of information required, manual interpretation was selected as the primary means of detecting change in the Land Cover Trends project. Mixtures of algorithm-based detection and manual interpretation may often prove to be the most feasible and appropriate design for change-detection applications. Serious examination of the expected characteristics and measurability of change must be considered during the design and implementation phase of any change analysis project. Numéro de notice : A2004-120 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.70.4.439 En ligne : https://doi.org/10.14358/PERS.70.4.439 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26647
in Photogrammetric Engineering & Remote Sensing, PERS > vol 70 n° 4 (April 2004) . - pp 439 - 448[article]Validation and calibration of Canada-wide coarse-resolution satellite burned-area maps / R.H. Fraser in Photogrammetric Engineering & Remote Sensing, PERS, vol 70 n° 4 (April 2004)
[article]
Titre : Validation and calibration of Canada-wide coarse-resolution satellite burned-area maps Type de document : Article/Communication Auteurs : R.H. Fraser, Auteur ; R.J. Hall, Auteur ; R. Landry, Auteur ; T. Lynham, Auteur ; et al., Auteur Année de publication : 2004 Article en page(s) : pp 451 - 460 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] carte thématique
[Termes IGN] dommage matériel
[Termes IGN] erreur systématique
[Termes IGN] image à basse résolution
[Termes IGN] image Landsat-TM
[Termes IGN] image NOAA-AVHRR
[Termes IGN] image SPOT-Végétation
[Termes IGN] incendie de forêt
[Termes IGN] régressionRésumé : (Auteur) Satellite-based mapping can provide a timely and efficient means of identifying burned vegetation at continental scales for estimating greenhouse gas emissions and impacts on the terrestrial carbon budget. In this study, we used a sample of 55 Landsat Thematic Mapper (TM) scenes distributed across Canada to validate and calibrate 1998 and 1999 national-level burned areas maps produced using coarse resolution (approx. 1-km) SPOT VEGETATION and NOAA AVHRR imagery. Commission and omissions errors, based on fire events greater than 200 ha, were found to be small in the coarse resolution maps (4 percent and 1 percent, respectively). However, the coarse resolution burned-area estimates were 72 percent larger than the crown fire burned area mapped at 30 m using Landsat TM (11,039 versus 6,403 ha average area). This bias was attributed to spatial aggregation effects in which the coarse resolution product included the tree crown fire, partial burn, and unburned fractions of a pixel. A regression calibration model (R = 0.95, p Numéro de notice : A2004-121 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article DOI : 10.14358/PERS.70.4.451 En ligne : https://doi.org/10.14358/PERS.70.4.451 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26648
in Photogrammetric Engineering & Remote Sensing, PERS > vol 70 n° 4 (April 2004) . - pp 451 - 460[article]