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[Three reports of EuroSDR projects] / European Spatial Data Research EuroSDR (2006)

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Titre :	[Three reports of EuroSDR projects]
Type de document :	Rapport
Auteurs :	European Spatial Data Research EuroSDR, Auteur
Editeur :	Dublin : European Spatial Data Research EuroSDR
Année de publication :	2006
Collection :	EuroSDR official publication, ISSN 0257-0505 num. 51
Importance :	185 p.
Format :	21 x 30 cm
ISBN/ISSN/EAN :	978-90-5179-491-6
Note générale :	Bibliographie
Langues :	Anglais (eng)
Descripteur :	[Vedettes matières IGN] Applications photogrammétriques [Termes IGN] analyse comparative [Termes IGN] automatisation [Termes IGN] données multisources [Termes IGN] modèle numérique de terrain
Index. décimale :	30.60 Géodésie spatiale
Résumé :	(Auteur) This report deals with research work how digital terrain models can automatically be checked and improved. Test material consisting of three DTMs of different acquisition methods has been prepared, and six research groups applied their methods with the delivered DTMs. The provided imagery is suitable for the production of orthoimages and serves also as auxiliary material for the checking and improving of DTMs. The results of the participants were analyzed by means of accurate reference material with regard to accuracy. Furthermore, the completeness and degree of automation at the different methods have been evaluated. The report describes in detail the delivered test material, the characteristics of the different methods, the strategy in the evaluation including the applied accuracy measures. The improving of DTMs is also possible to a large extent. A thematic map can give a quick overview where additional measure-ments are required. The applied methods are compared by means of the accuracy measures derived both from the delivered material and from the accurate reference data of the pilot centre. One method, which derives correction for the delivered DTM by means of parallaxes between two over-lapping orthoimages, was applied to all test areas and achieved the best results. The three DTMs could be tested with an accuracy of Oj,=0.015% of the flying height. Proposals for future practical work and further investigations are given. The results of this investigation will also be disseminated in educational seminars and e-learning courses of the EuroSDR. The contributions of the participating research groups are attached in the appendix of the report. Copyright European Spatial Data Research
Numéro de notice :	15390
Affiliation des auteurs :	non IGN
Thématique :	IMAGERIE
Nature :	Rapport d'étude technique
DOI :	sans
En ligne :	http://www.eurosdr.net/sites/default/files/uploaded_files/eurosdr_publication_nd [...]
Format de la ressource électronique :	URL
Permalink :	https://documentation.ensg.eu/index.php?lvl=notice_display&id=62708

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The EuroSDR Test “Checking and Improving of Digital Terrain Models” / Joachim Höhle (2006)

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contenu dans [Three reports of EuroSDR projects] / European Spatial Data Research EuroSDR (2006)

Titre :	The EuroSDR Test “Checking and Improving of Digital Terrain Models”
Type de document :	Rapport
Auteurs :	Joachim Höhle, Auteur ; Markéta Potůčková, Auteur
Editeur :	Dublin : European Spatial Data Research EuroSDR
Année de publication :	2006
Collection :	EuroSDR official publication, ISSN 0257-0505 num. 51
Importance :	pp 9 - 142
Format :	21 x 30 cm
Langues :	Anglais (eng)
Descripteur :	[Vedettes matières IGN] Applications photogrammétriques [Termes IGN] contrôle qualité [Termes IGN] généralisation de MNT [Termes IGN] image aérienne [Termes IGN] modèle numérique de terrain [Termes IGN] orthoimage [Termes IGN] précision des mesures [Termes IGN] précision géométrique (imagerie) [Termes IGN] superposition d'images
Résumé :	(auteur) This report deals with research work how digital terrain models can automatically be checked and improved. Test material consisting of three DTMs of different acquisition methods has been prepared, and six research groups applied their methods with the delivered DTMs. The provided imagery is suitable for the production of orthoimages and serves also as auxiliary material for the checking and improving of DTMs. The results of the participants were analyzed by means of accurate reference material with regard to accuracy. Furthermore, the completeness and degree of automation at the different methods have been evaluated. The report describes in detail the delivered test material, the characteristics of the different methods, the strategy in the evaluation including the applied accuracy measures. The improving of DTMs is also possible to a large extent. A thematic map can give a quick overview where additional measurements are required. The applied methods are compared by means of the accuracy measures derived both from the delivered material and from the accurate reference data of the pilot centre. One method, which derives correction for the delivered DTM by means of parallaxes between two overlapping orthoimages, was applied to all test areas and achieved the best results. The three DTMs could be tested with an accuracy of σh=0.015% of the flying height. Proposals for future practical work and further investigations are given. The results of this investigation will also be disseminated in educational seminars and e-learning courses of the EuroSDR. The contributions of the participating research groups are attached in the appendix of the report.
Note de contenu :	bibliographie
Numéro de notice :	H2006-001
Affiliation des auteurs :	non IGN
Thématique :	IMAGERIE
Nature :	Chapître / contribution
En ligne :	http://www.eurosdr.net/publications/official-publication-no-51-2006
Format de la ressource électronique :	URL bulletin
Permalink :	https://documentation.ensg.eu/index.php?lvl=notice_display&id=93667

Documents numériques

Checking and Improving... - pdf auteur

Adobe Acrobat PDF

Reliability of direct georeferencing: An overview of the current approaches and possibilities / Jan Skaloud (2006)

Reliability of Direct Georeferencing... - pdf auteur

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contenu dans [Three reports of EuroSDR projects] / European Spatial Data Research EuroSDR (2006)

Titre :	Reliability of direct georeferencing: An overview of the current approaches and possibilities : Final report on phase 1
Type de document :	Rapport
Auteurs :	Jan Skaloud, Auteur
Editeur :	Dublin : European Spatial Data Research EuroSDR
Année de publication :	2006
Collection :	EuroSDR official publication, ISSN 0257-0505 num. 51
Importance :	pp 143 - 148
Format :	21 x 30 cm
Note générale :	bibliographie
Langues :	Anglais (eng)
Descripteur :	[Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] capteur spatial [Termes IGN] centrale inertielle [Termes IGN] contrôle qualité [Termes IGN] données GNSS [Termes IGN] étalonnage de capteur (imagerie) [Termes IGN] filtre de Kalman [Termes IGN] géoréférencement direct [Termes IGN] GPS-INS [Termes IGN] orientation du capteur intégrée [Termes IGN] Receiver Autonomous Integrity Monitoring
Résumé :	(auteur) After some initial hesitations, the direct georeferencing (DG) of airborne sensors by GPS/INS is now a widely accepted approach in the airborne mapping industry. Implementing DG not only speeds up the mapping process and thus increases the productivity, but also opens the door to new monitoring applications. Although the system manufactures tend to claim that DG is a well established technique and no longer a research topic, the technology users often encounter pitfalls due to undetected sensor behavior, varying data quality and consistency. One could almost claim that the reliability of DG is the Achilles’ heel of this otherwise revolutionary approach in civil airborne mapping. EuroSDR has recognized this problem and would like to address it in several phases. First phase of this effort are some preliminary investigations, charting the current situation and making suggestions for further research. The investigations are divided into the following technology fields: GNSS, inertial sensors and estimation methods, integrity and communication, calibration and integrated sensor orientation. Each field describes the current situation with respect to DG and discusses additional existing possibilities. These do not claim to be complete or exhaustive; however, they claim to address the essential features, methods and processes, the combination of which could increase the reliability of DG substantially without setting large side penalties.
Numéro de notice :	H2006-002
Affiliation des auteurs :	non IGN
Thématique :	IMAGERIE
Nature :	Chapître / contribution
En ligne :	http://www.eurosdr.net/publications/official-publication-no-51-2006
Format de la ressource électronique :	URL bulletin
Permalink :	https://documentation.ensg.eu/index.php?lvl=notice_display&id=93668

Documents numériques

Reliability of Direct Georeferencing... - pdf auteur

Adobe Acrobat PDF

Reliability of direct georeferencing: A case study on practical problems and solutions / Klaus Legat (2006)

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
15390-01	33.60	Livre	Centre de documentation	Photogrammétrie - Lasergrammétrie	Disponible

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