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Airborne GPS photogrammetry in low-altitude applications (Part Two) / Peter Kuntu-Mensah in Surveying and land information systems, vol 61 n° 3 (01/09/2001)

Public [article]  inSurveying and land information systems > vol 61 n° 3 (01/09/2001) . - pp 153 - 164 Titre : Airborne GPS photogrammetry in low-altitude applications (Part Two) Type de document : Article/Communication Auteurs : Peter Kuntu-Mensah, Auteur ; Raymond J. Hintz, Auteur Année de publication : 2001 Article en page(s) : pp 153 - 164 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] aérotriangulation [Termes IGN] géoréférencement direct [Termes IGN] GPS-INS [Termes IGN] ingénierie [Termes IGN] point de canevas Résumé : (Auteur) The use of GPS to determine camera exposure positions has been shown to drastically reduce and possibly eliminate the number of ground control points required in a photogrammetric aerial triangulation. This notwithstanding, the application of airborne GPS in lowaltitude photogrammetry has been virtually nonexistent. The research described in this paper suggests that airborne GPS can provide measurement accuracies suitable for engineering design and similar applications. Numéro de notice : A2001-164 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21859 [article]

Voir aussi

• Airborne GPS photogrammetry comes of age (Part One) / Peter Kuntu-Mensah in Surveying and land information systems, vol 61 n° 2 (01/06/2001)

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
121-01031	SL	Revue	Centre de documentation	Revues en salle	Disponible

Transformation of datasets in a linear-based map conflation framework / Y. Doytsher in Surveying and land information systems, vol 61 n° 3 (01/09/2001)

Public [article]  inSurveying and land information systems > vol 61 n° 3 (01/09/2001) . - pp 165 - 175 Titre : Transformation of datasets in a linear-based map conflation framework Type de document : Article/Communication Auteurs : Y. Doytsher, Auteur ; S. Filin, Auteur ; E. Ezra, Auteur Année de publication : 2001 Article en page(s) : pp 165 - 175 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] fusion de données multisource [Termes IGN] jeu de données localisées [Termes IGN] transformation Résumé : (Auteur) Overlapping datasets originating from different sources tend to have positional discrepancies between similar objects. The underlying process that generates these discrepancies is usually unknown and is nonhomogenous in nature. The nonhomogeneity suggests that registration of the datasets should be performed using local transformations; the type of local transformations is, however, an open question. Usually, a local rubbersheeting transformation that utilizes nodes as counterpart features is applied to solve these discrepancies. However, pointbased transformation is adequate only for simple cases. This paper presents a local transformation algorithm based on counterpart linear features. The transformation is more general in essence and suitable to a wide range of cases, especially for transformation of spatial geographic data. The linebased transformation is presented here as part of a linearbased map conflation algorithm, a framework under which this transformation is most likely to be encountered in geographic information systems (GIS). Nevertheless it can also be applied separately as part of different applications. Numéro de notice : A2001-165 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21860 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
121-01031	SL	Revue	Centre de documentation	Revues en salle	Disponible

Using GPS to detect vertical movement along a leveling line in Imperial valley, California / W. Parks in Surveying and land information systems, vol 61 n° 3 (01/09/2001)

Public [article]  inSurveying and land information systems > vol 61 n° 3 (01/09/2001) . - pp 177 - 191 Titre : Using GPS to detect vertical movement along a leveling line in Imperial valley, California Type de document : Article/Communication Auteurs : W. Parks, Auteur Année de publication : 2001 Article en page(s) : pp 177 - 191 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] Californie (Etats-Unis) [Termes IGN] déformation verticale de la croute terrestre [Termes IGN] détection de changement [Termes IGN] hauteur ellipsoïdale [Termes IGN] nivellement par GPS Résumé : (Auteur) A GPS survey designed to precisely estimate ellipsoidal height was conducted in 1997 on benchmarks of a precise leveling line in Imperial Valley, California, a line actively leveled to monitor ground subsidence related to geothermal fluid withdrawal. The survey duplicated a 1995 survey. Data were analyzed to estimate differences in ellipsoidal height between adjacent benchmarks. GPSderived height differences for 1997 were compared to 1995 differences. Discrepancies were analyzed to identify leveling sections in which vertical movement might have occurred. Three such sections were identified. Numéro de notice : A2001-166 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21861 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
121-01031	SL	Revue	Centre de documentation	Revues en salle	Disponible

Locally produced geodetic control and cadastral framework data in the United States / David Tulloch in Surveying and land information systems, vol 61 n° 3 (01/09/2001)

Public [article]  inSurveying and land information systems > vol 61 n° 3 (01/09/2001) . - pp 201 - 205 Titre : Locally produced geodetic control and cadastral framework data in the United States Type de document : Article/Communication Auteurs : David Tulloch, Auteur Année de publication : 2001 Article en page(s) : pp 201 - 205 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes IGN] données cadastrales [Termes IGN] données localisées [Termes IGN] Etats-Unis [Termes IGN] exhaustivité des données [Termes IGN] information géographique [Termes IGN] infrastructure nationale des données localisées Résumé : (Auteur) A recent national survey provides a nationwide description of framework data. The National Framework Survey was conducted by the National States Geographic Information Council and the Federal Geographic Data Committee. This paper presents findings from that survey about locally produced geodetic control and cadastral framework data. Included are specifics about spatial accuracy, completeness, and different data production activities. While the survey results provide evidence of the substantial work being done on these framework themes, they also illustrate the difficulties that remain before achieving the state goal of a national spatial data infrastructure. The results suggest that data about geodetic control, cadastral reference and publicly owned land framework are being produced widely, bin with some differences of quality and content. Ultimately these findings raise a question as to future strategies for the development of an NSDI. In particular, the survey highlights the inevitable conflict of using locally produced data as a fundamental element within a much larger network of data. Numéro de notice : A2001-167 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21862 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
121-01031	SL	Revue	Centre de documentation	Revues en salle	Disponible