Centre de documentation
scientifique

Combined adjustment of angle and distance measurements in a dam monitoring network / J. Casaca in Survey review, vol 47 n° 342 (May 2015)  

Public [article]  inSurvey review > vol 47 n° 342 (May 2015) . - pp 181 - 184 Titre : Combined adjustment of angle and distance measurements in a dam monitoring network Type de document : Article/Communication Auteurs : J. Casaca, Auteur ; N. Braz, Auteur ; V. Conde, Auteur Année de publication : 2015 Article en page(s) : pp 181 - 184 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale [Termes IGN] ajustement de paramètres [Termes IGN] angle [Termes IGN] barrage [Termes IGN] distance [Termes IGN] Portugal [Termes IGN] surveillance d'ouvrage Résumé : (auteur) The safety control and structural analysis of Portuguese large dams has been using, for many decades, small triangulation networks to monitor the horizontal displacements of a carefully selected set of target points on the dams. The recent surge in the use of motorised tacheometers, which enable automatic measurement of angles and distances, is changing traditional triangulation networks into combined angles/distances networks. This paper addresses the estimation of weights for the combined adjustment of angles and distances. Numéro de notice : A2015-932 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1179/1752270614Y.0000000106 En ligne : https://doi.org/10.1179/1752270614Y.0000000106 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79737 [article]

Modernization of the method of line-line intersection using RTN GNSS technology for determining the position of corners of buildings / Robert Krzyzek in Artificial satellites, vol 50 n° 1 (March 2015)  

Public [article]  inArtificial satellites > vol 50 n° 1 (March 2015) . - pp 41 - 58 Titre : Modernization of the method of line-line intersection using RTN GNSS technology for determining the position of corners of buildings Type de document : Article/Communication Auteurs : Robert Krzyzek, Auteur Année de publication : 2015 Article en page(s) : pp 41 - 58 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Topographie [Termes IGN] angle [Termes IGN] bâtiment [Termes IGN] intersection spatiale Résumé : (auteur) Carrying out measurements of buildings with RTN GNSS technology in difficult environmental conditions appears to be a major challenge for many surveyors. Achieving the required accuracy of the position of a building structure is often a difficult, and sometimes even an impossible task to perform. This paper presents an innovative solution to increase the reliability of determining the coordinates of building corners, by modernizing the results obtained from the indirect method of measurement of line-line intersection by the socalled half-angle method. Generally speaking, the half-angle method is to verify the angular values in determined points (corners of buildings) from the method of intersection of the base point lines. Optimization of this method involves reducing deformation of a building, which has been determined in real time, taking into account only the classical method of line-line intersection. In order to obtain optimized measurement results, the conversion of the obtained results to the convergent values relative to the most probable coordinates is performed. Based on a detailed comparative and statistical analyses, it can be concluded that the modernized method of line intersection, employed in the RTN GNSS mode with the half-angle method, greatly improves the reliability of determining corners of buildings (X and Y coordinates), as well as provides an exact reflection of the geometric shape of a structure. Numéro de notice : A2015-288 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1515/arsa-2015-0004 En ligne : https://doi.org/10.1515/arsa-2015-0004 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76407 [article]

Comparison of angles from surface slope-aspect algorithms / M.E. Hodgson in Cartography and geographic information systems, vol 25 n° 3 (July 1998)  

Public [article]  inCartography and geographic information systems > vol 25 n° 3 (July 1998) . - pp 173 - 185 Titre : Comparison of angles from surface slope-aspect algorithms Type de document : Article/Communication Auteurs : M.E. Hodgson, Auteur Année de publication : 1998 Article en page(s) : pp 173 - 185 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] analyse comparative [Termes IGN] angle [Termes IGN] classification barycentrique [Termes IGN] modèle numérique de surface [Termes IGN] pente Résumé : (Auteur) Few studies have compared algorithms for mapping surface slope and aspect from digital elevation models. Those studies that have compared these algorithms treat slope and aspect angles independently. The evaluation and comparison of surface orientation algorithms may also be conducted by treating slope and aspect as characteristics of a bidirectional vector normal to the surface. Such a comparison is more appropriate for selecting an accurate surface orientation algorithm for applications that use bidirectional measurements, such as modeling solar radiation or removing the topographic effect from remotely sensed imagery. This study empirically compared the slope angle and bidirectional surface angle estimated from five slope/ aspect algorithms using a synthetic terrain surface and an actual terrain surface. The most accurate algorithm is consistently that which uses only the four nearest neighboring elevations in the grid. Numéro de notice : A1998-207 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1559/152304098782383106 En ligne : https://doi.org/10.1559/152304098782383106 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26171 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-98031	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Geometry of corner lot curves / N.F. Danial in Surveying and Mapping, vol 49 n° 2 (01/06/1989)

Public [article]  inSurveying and Mapping > vol 49 n° 2 (01/06/1989) . - pp 95 - 100 Titre : Geometry of corner lot curves Type de document : Article/Communication Auteurs : N.F. Danial, Auteur Année de publication : 1989 Article en page(s) : pp 95 - 100 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Mathématique [Termes IGN] angle [Termes IGN] bloc photo [Termes IGN] courbe [Termes IGN] géométrie [Termes IGN] raccord d'images Numéro de notice : A1989-219 Affiliation des auteurs : non IGN Thématique : MATHEMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25179 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
121-89021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Corner identification considerations for a public land survey system data base / N. Von Meyer in Surveying and Mapping, vol 49 n° 1 (01/03/1989)

Public [article]  inSurveying and Mapping > vol 49 n° 1 (01/03/1989) . - pp 25 - 29 Titre : Corner identification considerations for a public land survey system data base Type de document : Article/Communication Auteurs : N. Von Meyer, Auteur ; G. Mahun, Auteur Année de publication : 1989 Article en page(s) : pp 25 - 29 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cadastre [Termes IGN] angle [Termes IGN] base de données foncières [Termes IGN] point coté [Termes IGN] système d'information géographique Numéro de notice : A1989-073 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83646 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
121-89011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Curve ranging by optimum point method / O.C. Ojinnaka in Survey review, vol 30 n° 231 (01/01/1989)  

Permalink

Tridimensional adjustment with inner constraints in small control networks / A.G. Camacho in Survey review, vol 29 n° 230 (October 1988)  

Permalink

Nonparametric modeling of radiance in hill country / J.R. Dymond in Remote sensing of environment, vol 25 n° 1 (01/06/1988)  

Permalink

Système de symboles cohérents en topographie : propositions adoptées par la commission d'enseignement de l'AFT le 25 mars 1987 / Anonyme in XYZ, n° 32-33 (septembre - novembre 1987)

Permalink

Significance of non-isotropic scattering from vegetation for geobotanical remote sensing / J.W. Salisbury in International Journal of Remote Sensing IJRS, vol 8 n° 7 (July 1987)  

Permalink

Ein dreidimensionales geometrisch-physikalisches Modell für konventionelle Beobachtungen / J. Zaiser (1984)

Permalink

Notions sur les représentations planes de la Terre / Gilbert Gambier (1984)

Permalink

Mathématiques de base / Frank Ayres Jr (1978)

Permalink

Manuel de topographie, topométrie, première édition incomplète / J. Laborde (1977)

Permalink

Topographie, topométrie, 1. Premier fascicule / Raymond d' Hollander (1976)

Permalink