Centre de documentation
scientifique

Mean monthly series of sea level observations (1777-1993) at the Kronstadt gauge / V. Bogdanov (2000)

Public Titre : Mean monthly series of sea level observations (1777-1993) at the Kronstadt gauge Type de document : Rapport Auteurs : V. Bogdanov, Auteur ; M. Medvedev, Auteur ; V. Solodov, Auteur ; et al., Auteur Editeur : Helsinki : Finnish Geodetic Institute FGI Année de publication : 2000 Collection : Reports of the Finnish Geodetic Institute num. 2000- Importance : 34 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-951-711-237-6 Note générale : Bibliographie note : no de collection = 2000-1 Langues : Anglais (eng) Descripteur : [Termes IGN] dix-huitième siècle [Termes IGN] dix-neuvième siècle [Termes IGN] données marégraphiques [Termes IGN] Saint-Petersbourg [Termes IGN] série temporelle [Termes IGN] vingtième siècle [Vedettes matières IGN] Altimétrie Résumé : (Auteur) The versions of mean monthly (MMSL) and mean annual (MYSL) sea level observation series for 1777-1993 at the Kronstadt gauge and for 1989-1993 at its Shepelevo duplicate (Baltic Sea, Gulf of Finland, Isle of Kotlin, Russia) are submitted for the first time. The archival, fund and published materials of the State Hydrographical Service of the Navy, State Hydrometeorological Service, State Geodetic Service, Russian Academy of Sciences are used. The Kronstadt gauge is the oldest sea level station of Russia, which zero point is accepted as the Initial Point of the State Levelling Network and the Origin of National (“Baltic”) System of Heights. The basic information about the tide gauges, sea level observations, datum level, geodetic control and methods of restoration of long-term series is given. Some results and prospects of the further works are discussed. Note de contenu : 1 Introduction 2 Brief historical information on the sea level observations in the region 3 Basic knowledge of the Kronstadt and Shepelevo gauges and peculiarities of secular series restoration methods 4 Description of mean monthly series (1777-1993) at the Kronstadt gauge 5 Description of mean monthly series (1988-1993) at the Shepelevo duplicate of the Kronstadt gauge 6 Brief characteristic of sea level series 7 Conclusion Numéro de notice : 14651 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Rapport Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=40591

Final results of the Baltic Sea level 1997 GPS campaign / Markku Poutanen (1999)

Public Titre : Final results of the Baltic Sea level 1997 GPS campaign : research works of the SSG 8.1 of the International Association of Geodesy Type de document : Rapport Auteurs : Markku Poutanen, Éditeur scientifique ; J. Kakkuri, Éditeur scientifique Editeur : Helsinki : Finnish Geodetic Institute FGI Année de publication : 1999 Collection : Reports of the Finnish Geodetic Institute num. 99-4 Importance : 182 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] Baltique, mer [Termes IGN] niveau moyen des mers [Termes IGN] nivellement par GPS [Termes IGN] réseau altimétrique local [Termes IGN] traitement de données GNSS Index. décimale : 30.50 Nivellement - généralités Numéro de notice : 53893 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Recueil / ouvrage collectif Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=43435

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
53893-01	30.50	Livre	Centre de documentation	Géodésie	Disponible

Kyviskes calibration baseline / Jorma Jokela (1999)

Public Titre : Kyviskes calibration baseline Type de document : Rapport Auteurs : Jorma Jokela, Auteur ; P. Petroskevicius, Auteur ; V. Tulevicius, Auteur Editeur : Helsinki : Finnish Geodetic Institute FGI Année de publication : 1999 Collection : Reports of the Finnish Geodetic Institute num. 99-3 Importance : 15 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Triangulation [Termes IGN] base d'étalonnage [Termes IGN] calibrage Index. décimale : 30.32 Travaux de triangulation Numéro de notice : 54757 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=59694

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
54757-01	30.32	Livre	Centre de documentation	En réserve M-103	Disponible

Map generalisation in the nordic countries / T. Kilpelainen (1999)

Public Titre : Map generalisation in the nordic countries Type de document : Rapport Auteurs : T. Kilpelainen, Auteur Editeur : Helsinki : Finnish Geodetic Institute FGI Année de publication : 1999 Collection : Reports of the Finnish Geodetic Institute num. 99-6 Importance : 58 p. Format : 21 x 29 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] Danemark [Termes IGN] détail topographique [Termes IGN] Finlande [Termes IGN] généralisation cartographique [Termes IGN] Islande [Termes IGN] Norvège [Termes IGN] Suède [Termes IGN] système d'information géographique [Vedettes matières IGN] Généralisation Numéro de notice : 69555 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Rapport Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=44827

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
69555-01	39.20	Livre	Centre de documentation	En réserve M-103	Disponible

Orientation of optical airborne and spaceborne images for small and medium scale mapping purposes / Eija Honkavaara (1999)

Public Titre : Orientation of optical airborne and spaceborne images for small and medium scale mapping purposes Type de document : Rapport Auteurs : Eija Honkavaara, Auteur ; Mirjam Bilker, Auteur ; X. Yu, Auteur ; Juha Jaakkola, Auteur ; Harri Kaartinen, Auteur ; J. Ylonen, Auteur Editeur : Helsinki : Finnish Geodetic Institute FGI Année de publication : 1999 Collection : Reports of the Finnish Geodetic Institute num. 99-5 Importance : 57 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] aérotriangulation [Termes IGN] image aérienne [Termes IGN] image JERS [Termes IGN] image optique [Termes IGN] image spatiale [Termes IGN] orientation d'image [Termes IGN] orientation du capteur [Termes IGN] photographie à moyenne échelle [Termes IGN] photographie à petite échelle [Termes IGN] point d'appui [Termes IGN] point de vérification [Termes IGN] points homologues Index. décimale : 33.30 Photogrammétrie numérique Résumé : (Auteur) Recent technical progress has resulted in significant improvement of the orientation process. The most revolutionary developments include automation of tie point measurement and direct determination of orientation parameters with GPS and INS techniques. Options to be taken into account when selecting materials for mapping and methods for orientation include image type (scale; standard frame, digital camera; spaceborne, airborne), block geometry (single image orientation, aerial triangulation (AT)), ground control (targeted, untargeted, GIS data, etc.), image observations (automatic, interactive) and utilisation of directly measured orientation parameters. The task is to optimise costs, accuracy and reliability. These questions have been investigated at the Finnish Geodetic Institute (FGI) for medium and small scale mapping applications with spatial resolution and accuracy requirements for 15 m. Both theoretical and empirical considerations have been made with respect to several variables: observations of orientation parameters (GPS, no GPS, GPS processing), block structure (cross strips, no cross strips; single image, block), ground control points (GCPs, targeted, untargeted and GIS data: nationwide digital orthophotos, base maps and elevation models), image observations of tie points and GCPs (interactive, automatic) and image material (1:31 000 and 1:60 000 standard airborne images with approximately 1 m and 5 m pixel sizes; JERS/VNIR satellite images). All the airborne cases were analysed using the same strategies and checkpoints. JERSIVNIR images were analysed in parallel with the airborne images, but no comprehensive comparisons between the materials could be made because of large resolution differences. The results of GPS measurements of perspective centres showed offsets and linear drifts varying from strip to strip, but compensation in AT with minimum ground control was possible. Targeted GCPs yielded high accuracy and reliability. Untargeted GCPs and GIS data as ground control, especially digital orthophotos and DEM25, also yielded good accuracy, although care is needed to avoid problems with gross errors. With GIS data, systematic errors can also be expected. The empirical and simulation results obtained make it possible to select GCP materials for obtaining various accuracy levels in the cases of spatial resection and AT with or without GPS support. It was concluded that in block adjustment, a planimetric accuracy of 10 gm in the image and a height accuracy of 0.1%oH can be obtained by using a reasonable number of GCPs (e.g. in 4 base distances) with accuracy better than 20 µm in image. Several examples of suitable GCP materials and configurations for obtaining accuracy better than 1 m were given. High accuracy was obtained with automatic tie point measurement, but investigations are still needed concerning optimal adjustment methods and number of points. The results, however, were in any case sufficient for applications with medium quality requirements. Experiences of orientation of JERS/VNIR images with rigorous methods were good; accuracy of 0.4 pixels was obtained with only 4 GCPs. In all the cases, the results of empirical and theoretical investigations correlated as long as the assumptions were valid; therefore reliable knowledge of the quality of the materials used as the basis for orientation is an important presupposition. Numéro de notice : 67564 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Rapport Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=44680

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
67564-01	33.30	Livre	Centre de documentation	Photogrammétrie - Lasergrammétrie	Disponible

Quality of FLPIS land parcel digitization / Harri Kaartinen (1999)

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Quality of FLPIS orthophotos / Eija Honkavaara (1999)

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An early crop yield estimation method for Finnish conditions / Risto Kuittinen (1998)

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Gravity measurements of Estonia / H. Sildvee (1998)

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On superconducting gravimeter observations above 8 MHz at the Metsahovi station, Finland / H. Virtanen (1998)

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SAR images and ancillary data in crop species interpretation / Leena Matikainen (1998)

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Second continental workshop on the geoid in Europe, Budapest (Hongary), March 10-14, 1998 : Proceedings / Martin Vermeer (1998)  

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Automated calibration of precise levelling rods in Finland / M. Takalo (1997)

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Geoid determination by FFT techniques in the western China test area / Martin Vermeer (1997)

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Proceedings of the Finnish-Russian seminar on remote sensing / Risto Kuittinen (1997)

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