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A theoretical approach to modeling the accuracy assessment of digital elevation models / F. Aguilar in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 12 (December 2007)
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[article]
Titre : A theoretical approach to modeling the accuracy assessment of digital elevation models Type de document : Article/Communication Auteurs : F. Aguilar, Auteur ; F. Aguera, Auteur ; M. Aguilar, Auteur Année de publication : 2007 Article en page(s) : pp 1367 - 1379 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] erreur moyenne quadratique
[Termes IGN] fiabilité des données
[Termes IGN] fonction de base radiale
[Termes IGN] interpolation inversement proportionnelle à la distance
[Termes IGN] méthode de Monte-Carlo
[Termes IGN] modèle numérique de surface
[Termes IGN] précision des données
[Termes IGN] résiduRésumé : (Auteur) In this paper, a theoretical analysis is presented of the degree of correctness to which the accuracy figures of a grid Digital Elevation Model (DEM) have been estimated, measured as Root Mean Square Error (RMSE) depending on the number of checkpoints used in the accuracy assessment process. The latter concept is sometimes referred to as the Reliability of the DEM accuracy tests. Two theoretical models have been developed for estimating the reliability of the DEM accuracy figures using the number of checkpoints and parameters related to the statistical distribution of residuals (mean, variance, skewness, and standardized kurtosis). A general case was considered in which residuals might be weakly correlated (local spatial autocorrelation) with non-zero mean and non-normal distribution. Thus, we avoided the “strong assumption” of distribution normality accepted in some of the previous works and in the majority of the current standards of positional accuracy control methods. Sampled data were collected using digital photogrammetric methods applied to large scale stereo imagery (1:5 000). In this way, seven morphologies were sampled with a 2 m by 2 m sampling interval, ranging from flat (3 percent average slope) to the highly rugged terrain of marble quarries (82 percent average slope). Two local schemes of interpolation have been employed, using Multiquadric Radial Basis Functions (MRBF) and Inverse Distance Weighted (IDW) interpolators, to generate interpolated surfaces from high-resolution grid DEMs. The theoretical results obtained were experimentally validated using the Monte Carlo simulation method. The proposed models provided a good fit for the raw simulated data for the seven morphologies and the two schemes of interpolation tested (r2 > 0.96 as mean value). The proposed theoretical models performed very well for modeling the non-gaussian distribution of the errors at the checkpoints, a property which is very common in geographically distributed data. Copyright ASPRS Numéro de notice : A2007-542 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.73.12.1367 En ligne : https://doi.org/10.14358/PERS.73.12.1367 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28905
in Photogrammetric Engineering & Remote Sensing, PERS > vol 73 n° 12 (December 2007) . - pp 1367 - 1379[article]Topographie : un demi-siècle d'évolution technologique : (4/4) l'avènement des satellites, la géodésie spatiale, le GPS ; la photogrammétrie / Paul Courbon in XYZ, n° 113 (décembre 2007 - février 2008)
[article]
Titre : Topographie : un demi-siècle d'évolution technologique : (4/4) l'avènement des satellites, la géodésie spatiale, le GPS ; la photogrammétrie Type de document : Article/Communication Auteurs : Paul Courbon, Auteur Année de publication : 2007 Article en page(s) : pp 29 - 42 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] appareil de restitution
[Termes IGN] évolution technologique
[Termes IGN] Global Positioning System
[Termes IGN] orthophotoplan numérique
[Termes IGN] photogrammétrie numérique
[Termes IGN] positionnement cinématique en temps réel
[Termes IGN] positionnement par géodésie spatiale
[Termes IGN] positionnement par GPS
[Termes IGN] station virtuelle de référenceRésumé : (Documentaliste) Cette quatrième partie porte sur la géodésie spatiale, puis sur les dernières évolutions en photogrammétrie. Après avoir lancé le système de positionnement par satellites Transit qui amènera l'IGN à s'équiper en récepteurs Doppler, les Etats Unis développe un nouveau système, le GPS dès 1978. La technologie progresse et les modes de positionnement permettent une précision encore jamais atteinte en position absolue. Aujourd'hui, le réseau mondial de stations de référence densifié en Europe comme en France, (réseau géodésique permanent français) permet le "mode cinématique multistations de référence". Côté photogrammétrie, c'est encore l'informatique qui fait évoluer les matériels. On passe de l'analogique à l'analytique, puis au tout numérique. Les images sont maintenant directement numériques à l'IGN, grâce à une nouvelle chambre à détecteurs de transfert de charge. La BD Ortho de l'IGN couvre la France d'orthoimages et le géoportail permet de visualiser toutes ces images. Numéro de notice : A2007-635 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29472
in XYZ > n° 113 (décembre 2007 - février 2008) . - pp 29 - 42[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 112-07041 RAB Revue Centre de documentation En réserve L003 Exclu du prêt DEM control in Arctic Alaska with Icesat laser altimetry / D.K. Atwood in IEEE Transactions on geoscience and remote sensing, vol 45 n° 11 Tome 2 (November 2007)
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[article]
Titre : DEM control in Arctic Alaska with Icesat laser altimetry Type de document : Article/Communication Auteurs : D.K. Atwood, Auteur ; R. Guritz, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 3710 - 3720 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] Alaska (Etats-Unis)
[Termes IGN] altimétrie satellitaire par laser
[Termes IGN] Arctique
[Termes IGN] Arctique, océan
[Termes IGN] données ICEsat
[Termes IGN] glaciologie
[Termes IGN] GPS en mode différentiel
[Termes IGN] image ERS-SAR
[Termes IGN] image radar moirée
[Termes IGN] interféromètrie par radar à antenne synthétique
[Termes IGN] modèle numérique de surface
[Termes IGN] point d'appui
[Termes IGN] positionnement différentielRésumé : (Auteur) Use of Ice, Cloud, and land Elevation Satellite (ICESat) laser altimetry is demonstrated for control of a digital elevation model (DEM) that is synthesized from repeat-pass ERS-1 and 2 synthetic aperture radar (SAR) imagery using interferometric SAR (InSAR). Our study area is 15650 km2 of the Barrow, AK coastal plain adjacent to the Arctic Ocean; a vast expanse of tundra, lakes, and arctic wetlands of such low relief as to be nearly devoid of terrain features. The accuracy of the ICESat-derived elevation measurements is assessed by comparison with differential global positioning system (DGPS) data acquired along ICESat ground tracks. The ICESat-derived elevations have a mean accuracy, relative to the DGPS elevations, of 0.01 +0.18 m. ICESat-derived elevations on the Arctic coastal plain provide an excellent source for DEM control. We employ the ICESat-derived ground control points (GCPs) in two distinct InSAR processing steps: 1) selected points are used to perform baseline refinements, which improves the ERS-1 and 2 interferograms and 2) the ICESat-derived GCP position data (latitude, longitude, elevation) are then used as control in mosaicking multiple InSAR-derived OEMs. The resulting ICESat-controlled DEM has a mean accuracy of-1.11 + 6.3m relative to an independent standard, which is a commercial airborne InSAR-derived DEM having 0.5 m rms accuracy. This easily meets DTED-2 standards and suggests that DEMs derived using only ICESat altimetry for ground control would meet similar standards in other regions of low relief. Copyright IEEE Numéro de notice : A2007-509 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2007.904335 En ligne : https://doi.org/10.1109/TGRS.2007.904335 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28872
in IEEE Transactions on geoscience and remote sensing > vol 45 n° 11 Tome 2 (November 2007) . - pp 3710 - 3720[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-07111B RAB Revue Centre de documentation En réserve L003 Disponible Digital surface models from high-resolution satellite imagery / J. Poon in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 11 (November 2007)
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Titre : Digital surface models from high-resolution satellite imagery Type de document : Article/Communication Auteurs : J. Poon, Auteur ; Clive Simpson Fraser, Auteur ; C. Zhang, Auteur Année de publication : 2007 Article en page(s) : pp 1225 - 1231 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie spatiale
[Termes IGN] analyse comparative
[Termes IGN] ERDAS Imagine
[Termes IGN] extraction automatique
[Termes IGN] image à résolution métrique
[Termes IGN] image Ikonos
[Termes IGN] instrumentation Z/I Imaging
[Termes IGN] MNS SRTM
[Termes IGN] modèle numérique de surface
[Termes IGN] Socet SetRésumé : (Auteur) Automated processes in commercial-off-the-shelf (COTS) systems are increasingly prevalent as new technology, and new knowledge is fused to enhance accessibility to spatial information. Automated terrain extraction is becoming a standard capability implemented into photogrammetric software. This paper focuses on digital surface model (DSM) generation from high-resolution satellite imagery (HRSI) using three COTS systems, SOCET SET®, Z/I Imaging, and Imagine® OrthoBASE, which each have their own image matching strategy. By generating DSMs of a test field diverse in land-cover, we assess the performance of the COTS terrain extraction methodologies. In checkpoints favorable to image matching, accuracy to a few meters in height can be achieved from COTS generated DSMs, however the isolated points are unlikely to be representative of the entire scene. Therefore, we look to alternative sources of control, such as the newly available DLR- and NASA-generated SRTM DEMs. A comparison to X-band SRTM DEMs demonstrated that height RMSE values range from 4 to 9 metres, though most of this uncertainty is attributed to the SRTM data. Copyright ASPRS Numéro de notice : A2007-513 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.73.11.1225 En ligne : https://doi.org/10.14358/PERS.73.11.1225 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28876
in Photogrammetric Engineering & Remote Sensing, PERS > vol 73 n° 11 (November 2007) . - pp 1225 - 1231[article]Line-of-sight vector adjustment model for geopositioning of SPOT-5 stereo images / Hyung-Sup Jung in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 11 (November 2007)
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[article]
Titre : Line-of-sight vector adjustment model for geopositioning of SPOT-5 stereo images Type de document : Article/Communication Auteurs : Hyung-Sup Jung, Auteur ; S.W. Kim, Auteur ; J.S. Wong, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 1267 - 1276 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] couple stéréoscopique
[Termes IGN] distorsion d'image
[Termes IGN] géoréférencement
[Termes IGN] image SPOT 5
[Termes IGN] image SPOT-HRG
[Termes IGN] ligne de visée
[Termes IGN] orbitographie
[Termes IGN] point d'appui
[Termes IGN] stéréoscopieRésumé : (Auteur) We formulate and present a new geopositioning method for SPOT-5 High-Resolution Geometric (HRG) stereo images, named the line-of-sight (LOS) vector adjustment model. It is applicable to satellites that move along a well-defined close-to-circular elliptical orbit with a predicted orbit close to true. SPOT-5 satisfies these requirements because it has the improved capability of providing accurate satellite attitude and a look angle for each detector. The method’s core idea is that only the LOS vector was adjusted when correcting the geometric distortion of SPOT-5 imagery. One advantage of this method is that it achieves high geopositioning accuracy with a limited number of ground control points (GCPs). Although a minimum of three GCPs is needed for processing, a test result satisfied the accuracy requirement within one pixel of a SPOT-5 panchromatic image even with only three GCPs. The performance in terms of root mean square error (RMSE) improved as the number of GCPs increased. Five GCPs were found to be the optimal number in the practical application of the LOS vector adjustment model. Using five GCPs, the RMSEs were 0.48 m and 0.64 m in planimetry and height, respectively. The test results indicate that the proposed method is superior to the bundle adjustment method for the geopositioning of SPOT-5 HRG stereo images. Copyright ASPRS Numéro de notice : A2007-517 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.73.11.1267 En ligne : http://dx.doi.org/10.14358/PERS.73.11.1267 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28880
in Photogrammetric Engineering & Remote Sensing, PERS > vol 73 n° 11 (November 2007) . - pp 1267 - 1276[article]Orthophoto generation from unorganized point clouds / L. Tournas in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 11 (November 2007)
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