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Crossing natural and data set boundaries : coastal terrain modelling in the South-West Finnish Archipelago / A. Stock in International journal of geographical information science IJGIS, vol 24 n° 9 (september 2010)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 24 n° 9 (september 2010) . - pp 1435 - 1425 Titre : Crossing natural and data set boundaries : coastal terrain modelling in the South-West Finnish Archipelago Type de document : Article/Communication Auteurs : A. Stock, Auteur ; H. Tolvanen, Auteur ; R. Kalliola, Auteur Année de publication : 2010 Article en page(s) : pp 1435 - 1425 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] archipel [Termes IGN] eaux côtières [Termes IGN] Finlande [Termes IGN] frontière [Termes IGN] intégration de données [Termes IGN] littoral [Termes IGN] modèle numérique de terrain [Termes IGN] pente [Termes IGN] trait de côte Résumé : (Auteur) Geographical information systems (GIS) are important tools in coastal research and management. Coastal GIS applications involve special challenges, because the coastal environment is a complex transitional system between the terrestrial and marine realms. Also acquisition methods and responsibilities for spatial data (and thus their properties) change at the shoreline. This article explores the consequences of this land-sea divide for coastal terrain modelling. We study how methods designed for terrestrial environments can be used to create integrated raster coastal terrain models (CTMs) from coarse elevation and depth data. We focus on shore slopes, because many particularities of coastal terrain and the data which describe it as well as the resulting problems are concentrated in the shore zone. Based on shorelines, terrestrial contours, depth contours and depth points, we used the ANUDEM algorithm to interpolate CTMs at different spatial resolutions, with and without drainage enforcement, for two test areas in a highly complex archipelago coast. Slope aspect and gradient rasters were derived from the CTMs using Horn's algorithm. Values were assigned from the slope rasters to thousands of points along the test areas' shorelines in different ways. Shore slope gradients and aspects were also calculated directly from the shorelines and contours. These modelled data were compared to each other and to field-measured shore profiles using a combination of qualitative and quantitative methods. As far as the coarse source data permitted, the interpolation and slope calculations delivered good results at fine spatial resolutions. Vector-based slope calculations were very sensitive to quality problems of the source data. Fine-resolution raster data were consequently found most suitable for describing shore slopes from coarse coastal terrain data. Terrestrial and marine parts of the CTMs were subject to different errors, and modelling methods and parameters had different consequences there. Thus, methods designed for terrestrial applications can be successfully used for coastal terrain modelling, but the choice of methods and parameters and the interpretation of modelling results require special attention to the differences of terrestrial and marine topography and data. Numéro de notice : A2010-408 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658811003591698 En ligne : https://doi.org/10.1080/13658811003591698 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30601 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-2010051	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-2010052	RAB	Revue	Centre de documentation	En réserve L003	Disponible

A novel solution of the Finnish NSDI / Tuuli Toivonen in Geoinformatics, vol 10 n° 7 (01/11/2007)

Public [article]  inGeoinformatics > vol 10 n° 7 (01/11/2007) . - pp 24 - 25 Titre : A novel solution of the Finnish NSDI Type de document : Article/Communication Auteurs : Tuuli Toivonen, Auteur ; R. Kalliola, Auteur Année de publication : 2007 Article en page(s) : pp 24 - 25 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes IGN] acquisition de données [Termes IGN] Finlande [Termes IGN] implémentation (informatique) [Termes IGN] infrastructure européenne de données localisées [Termes IGN] INSPIRE [Termes IGN] interface web [Termes IGN] métadonnées [Termes IGN] partage de données localisées [Termes IGN] qualité des données Résumé : (Auteur) The INSPIRE directive puts foward a variety of GI infrastructure services at the national level. Most countries are currently at the planning phase of their own metadata and viewing services. Issues related to describing spatial data quality, defining data prices and enhancing the discovery of data sets are topical from country to country. In Finland, the challenges have been solved in part through a concept of spatial data lending. Copyright GEOinformatics Numéro de notice : A2007-497 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28860 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
262-07071	SL	Revue	Centre de documentation	Revues en salle	Disponible

Tailor-made facilities to enhance spatial communication / R. Kalliola in Geoinformatics, vol 10 n° 5 (01/07/2007)

Public [article]  inGeoinformatics > vol 10 n° 5 (01/07/2007) . - pp 20 - 23 Titre : Tailor-made facilities to enhance spatial communication Type de document : Article/Communication Auteurs : R. Kalliola, Auteur ; Tuuli Toivonen, Auteur Année de publication : 2007 Article en page(s) : pp 20 - 23 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes IGN] accessibilité [Termes IGN] Copernicus (programme européen) [Termes IGN] infrastructure mondiale des données localisées [Termes IGN] INSPIRE Résumé : (Auteur) The availability of digital spatial data is essential for the functioning of modern societies. This has been recognized by many international initiatives, such as the recent INSPIRE directive in Europe and global GSDI or thematic GMES or GBIF. Such initiatives focus primarily on setting up basic infrastructures for the delivery of spatially referenced data or their metadata. The value of these technical infrastructures is, however, finally evaluated on the basis of the added value of the user-oriented interface services that they are able to support and enable. Copyright GEOinformatics Numéro de notice : A2007-343 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28706 [article]