Error map of landslide model resulting from the adoption of different methods for the definition of displacement fiel

• Autorzy: Wyczałek I.
• Języki publikacji: EN

Abstrakty

EN

A vast area of landslide topped by a road, required tacheometric survey of marked points. As a result of repeated surveys the displacement vectors were obtained for each observed mark. Assuming that the points are a representation of spatial phenomenon, the map of movements of entire slope was carried out using two methodological approaches - the nearest neighbor (NN), in which weights to near lying observed points are much more important than to the more distant, and kriging, which describes the modeled phenomenon statistically. These approaches, like the most approximation techniques, base on the global nature of the phenomenon. In the meanwhile in not marked zone of described landslide the surface had been folded. In such cases the better is to take into account the aroused skeletal lines. The approximation techniques do not allow this. It was done using own algorithm TeMCA, which implements the method of cartographic cellular automata for surface modeling. The purpose of this study is to analyze differences between various ways of description of slope movements defined by both conventional methods and to compare them to the results of the TeMCA method which should better comply the nature of the landslide. Analyses were performed on synthetic data in order to avoid the impact of survey errors. The results of modeling have been elaborated in a graphical form and the distances between the different models were calculated for all cells of the grid. Maps of errors have been generated by taking into account the visualization of model errors. The conclusions focus on errors of interpretation of the results obtained by considered methods of modeling.

Słowa kluczowe

EN

research tachometry; movements of the earth

PL

badania tachimetryczne; ruchy ziemi

• Wydawca: Wydział Geodezji i Kartografii Politechniki Warszawskiej
• Czasopismo: Reports on Geodesy
• Rocznik: 2011
• Tom: z. 1/90
• Strony: 531--536
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Wyczałek I.

• Poznan University of Technology Institute of Civil Engineering

Bibliografia

• Daniel C., Tennant K., 2001: DEM Quality Assessment. Digital Elevation Model Technologies and Applications: The DEM Users Manual. ASPRS Pub. pp. 395-440.
• Kraus K., 1998: Interpolation nach kleinsten Quadraten versus Krige-Schaetzer. Osterreichische Zeitschrift fuer Vermessung & Geoinformation, 1.
• Kraus K., Pfeifer N., 2001: Advanced DTM generation from LiDAR data. International Archives of Photogrammetry and Remote Sensing, Volume XXXIV-3/.
• Wyczałek I., 2009: Using a cellular automaton for terrain modeling. Proc. International Cartographic Conference ICC2009, Santiago, Chile, 15-21.11.2009 (CD).
• Wyczałek I., 2010: Rastrowe metody modelowania terenu w porównaniu z geodezyjną interpolacją warstwic. In: "Główne problemy współczesnej kartografii 2010 Numeryczne modele terenu w kartografii" (W. Żyszkowska and W. Spallek, Eds). Wrocław 2010. ISBN 978-83-62673-01-8, 85-96.
• Wyczałek I., 2010: Nowa metoda modelowania powierzchni terenu dla potrzeb analiz i
• symulacji zjawisk przestrzennych. Archiwum Fotogrametrii, Kartografii i Teledetekcji. Vol. 21, 447-458.
• Wyczałek I., 2010: Skala barwna mapy decyzyjnej. In: Mapy i zobrazowania powierzchni (reviewed paper). ISBN 978-83-9330010-6-4. Section 1: 7-20.
• Wyczalek I., 2010: Cellular Automata in cartographic modeling and visualization of spatial phenomena. Manuscript sent for publication in magazine GeoInformatica.
• Wyczalek I., 2011: The method for simultaneous visualization of uncertainties and significance on decision maps. Manuscript prepared for publication in GeoInformatica.
• Yang X., Holder, T., 2000: Visual and statistical comparisons of surface modeling technique for point-based environmental data. Cartography and Geographic Information Science, 27 (2): 165-175.