Photogrammetric Engineering & Remote Sensing, PERS / American society for photogrammetry and remote sensing . vol 71 n° 9Paru le : 01/09/2005 ISBN/ISSN/EAN : 0099-1112 |
[n° ou bulletin]
est un bulletin de Photogrammetric Engineering & Remote Sensing, PERS / American society for photogrammetry and remote sensing (1975 -)
[n° ou bulletin]
|
Dépouillements
Ajouter le résultat dans votre panierImage misregistration error in change measurements / H. Wang in Photogrammetric Engineering & Remote Sensing, PERS, vol 71 n° 9 (September 2005)
[article]
Titre : Image misregistration error in change measurements Type de document : Article/Communication Auteurs : H. Wang, Auteur ; E.C. Ellis, Auteur Année de publication : 2005 Article en page(s) : pp 1037 - 1044 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] analyse comparative
[Termes IGN] cartographie écologique
[Termes IGN] Chine
[Termes IGN] détection de changement
[Termes IGN] erreur de positionnement
[Termes IGN] Etats-Unis
[Termes IGN] image à résolution métrique
[Termes IGN] image Ikonos
[Termes IGN] orthophotographie
[Termes IGN] paysage rural
[Termes IGN] paysage urbain
[Termes IGN] planimétrie
[Termes IGN] précision de localisation
[Termes IGN] réalité de terrain
[Termes IGN] régressionRésumé : (Auteur) Planimetric positional error limits the accuracy of landscape change measurements based on features interpreted from high spatial resolution imagery ( Numéro de notice : A2005-389 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.71.9.1037 En ligne : https://doi.org/10.14358/PERS.71.9.1037 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27525
in Photogrammetric Engineering & Remote Sensing, PERS > vol 71 n° 9 (September 2005) . - pp 1037 - 1044[article]Effects of forest environment and survey protocol on GPS accuracy / Christian Piedallu in Photogrammetric Engineering & Remote Sensing, PERS, vol 71 n° 9 (September 2005)
[article]
Titre : Effects of forest environment and survey protocol on GPS accuracy Type de document : Article/Communication Auteurs : Christian Piedallu, Auteur ; Jean-Claude Gégout, Auteur Année de publication : 2005 Article en page(s) : pp 1070 - 1078 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] acquisition de données
[Termes IGN] affaiblissement géométrique de la précision
[Termes IGN] analyse comparative
[Termes IGN] antenne GPS
[Termes IGN] correction différentielle
[Termes IGN] couvert forestier
[Termes IGN] feuillu
[Termes IGN] forêt
[Termes IGN] GPS en mode différentiel
[Termes IGN] instrumentation Trimble
[Termes IGN] positionnement par GPS
[Termes IGN] précision de localisation
[Termes IGN] récepteur GPS
[Termes IGN] ressources naturelles
[Termes IGN] saisonRésumé : (Auteur) The aim of the study is to test GPS equipment receivers commonly used for natural resource management, and to quantify recording rate and positioning quality under different conditions, the objective being to assist GPS users in their choices. Four factors were evaluated: (a) the type of receiver: three ranges of GPS equipment were compared; (b) forest cover effects (three covers were tested: open cover, coppice and deciduous high forest); (c) the effects of GPS survey components: the number of recordings (between 1 and 300), the Position Dilution of Precision (PDOP) thresholding (between 4 and 50), the time interval between recordings (between 1 and 15 seconds), and the differential correction effect; and (d) the season (winter and summer). A GPS survey was carried out and a database of 140,000 readings was established, from which a large number of random rover files were extracted for each combination of factors. It appears the only factor not to be significant is the seasonal effect. The type of equipment used and the forest cover effect both modify positioning accuracy by a factor of 2 or 3, as does the use of differential correction for Trimble receivers in open cover. Increasing the number of recordings and the time interval between recordings, and decreasing the PDOP threshold, improve precision, with a different effect according to the GPS receiver and the forest cover. The effect is generally more pronounced under high forest cover. The combined effects of GPS survey components produce significant changes in accuracy at the expense of the time spent in acquiring data. Numéro de notice : A2005-390 Affiliation des auteurs : non IGN Thématique : FORET/POSITIONNEMENT Nature : Article DOI : 10.14358/PERS.71.9.1071 En ligne : https://doi.org/10.14358/PERS.71.9.1071 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27526
in Photogrammetric Engineering & Remote Sensing, PERS > vol 71 n° 9 (September 2005) . - pp 1070 - 1078[article]Cloud-free satellite image mosaics with regression trees and histogram matching / E.H. Helmert in Photogrammetric Engineering & Remote Sensing, PERS, vol 71 n° 9 (September 2005)
[article]
Titre : Cloud-free satellite image mosaics with regression trees and histogram matching Type de document : Article/Communication Auteurs : E.H. Helmert, Auteur ; B. Ruefenacht, Auteur Année de publication : 2005 Article en page(s) : pp 1079 - 1089 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] appariement d'histogramme
[Termes IGN] classification par maximum de vraisemblance
[Termes IGN] détection de changement
[Termes IGN] histogramme
[Termes IGN] mosaïque d'images
[Termes IGN] nuage
[Termes IGN] ombre
[Termes IGN] régressionRésumé : (Auteur) Cloud-free optical satellite imagery simplifies remote sensing, but land-cover phenology limits existing solutions to persistent cloudiness to compositing temporally resolute, spatially coarser imagery. Here, a new strategy for developing cloud-free imagery at finer resolution permits simple automatic change detection. The strategy uses regression trees to predict pixel values underneath clouds and cloud shadows in reference scenes from other scene dates. It then applies improved histogram matching to adjacent scenes. In the study area, the islands of Puerto Rico, Vieques, and Culebra, Landsat image mosaics resulting from this strategy permit accurate detection of land development with only spectral data and maximum likelihood classification. Between about 1991 and 2000, urban/built-up lands increased by 7.2 percent in Puerto Rico and 49 percent in Vieques and Culebra. The regression tree modeling and histogram matching require no manual interpretation. Consequently, they can support large volume processing to distribute cloud-free imagery for simple change detections with common classifiers. Numéro de notice : A2005-391 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.71.9.1079 En ligne : https://doi.org/10.14358/PERS.71.9.1079 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27527
in Photogrammetric Engineering & Remote Sensing, PERS > vol 71 n° 9 (September 2005) . - pp 1079 - 1089[article]