World Library  

Add to Book Shelf
Flag as Inappropriate
Email this Book

Creation of a Multiresolution and Multiaccuracy Dtm: Problems and Solutions for Heli-dem Case Study : Volume Xl-5/W3, Issue 1 (07/01/2014)

By Biagi, L.

Click here to view

Book Id: WPLBN0004015424
Format Type: PDF Article :
File Size: Pages 9
Reproduction Date: 2015

Title: Creation of a Multiresolution and Multiaccuracy Dtm: Problems and Solutions for Heli-dem Case Study : Volume Xl-5/W3, Issue 1 (07/01/2014)  
Author: Biagi, L.
Volume: Vol. XL-5/W3, Issue 1
Language: English
Subject: Science, Isprs, International
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus Publications
Publication Date:
Publisher: Copernicus Publications, Göttingen, Germany
Member Page: Copernicus Publications


APA MLA Chicago

Carcano, L., Lucchese, A., Negretti, M., & Biagi, L. (2014). Creation of a Multiresolution and Multiaccuracy Dtm: Problems and Solutions for Heli-dem Case Study : Volume Xl-5/W3, Issue 1 (07/01/2014). Retrieved from

Description: Politecnico di Milano – DICA, Geomatics Laboratory at Como Campus, Via Valleggio 11, 22100 Como, Italy. The work is part of HELI-DEM (HELvetia-Italy Digital Elevation Model) project, funded by the European Regional Development Fund within the Italy-Switzerland cooperation program.

The aim of the project is the creation of a unique DTM for the alpine and subalpine area between Italy (Piedmont, Lombardy) and Switzerland (Ticino and Grisons Cantons); at present, different DTMs, that are in different reference frames and have been obtained with different technologies, accuracies, and resolutions, have been acquired. The final DTM should be correctly georeferenced and produced validating and integrating the data that are available for the project. DTMs are fundamental in hydrogeological studies, especially in alpine areas where hydrogeological risks may exist. Moreover, when an event, like for example a landslide, happens at the border between countries, a unique and integrated DTM which covers the interest area is useful to analyze the scenario. In this sense, HELI-DEM project is helpful.

To perform analyses along the borders between countries, transnational geographic information is needed: a transnational DTM can be obtained by merging regional low resolution DTMs. Moreover high resolution local DTMs should be used where they are available. To be merged, low and high resolution DTMs should be in the same three dimensional reference frame, should not present biases and should be consistent in the overlapping areas. Cross-validation between the different DTMs is therefore needed.

Two different problems should be solved: the merging of regional, partly overlapping low and medium resolution DTMs into a unique low/medium resolution DTM and the merging with other local high resolution/high accuracy height data.

This paper discusses the preliminary processing of the data for the fusion of low and high resolution DTMs in a study-case area within the Lombardy region: Valtellina valley. In this region the Lombardy regional low resolution DTM is available, with a horizontal resolution of 20 meters; in addition a LiDAR DTM with a horizontal resolution of 1 meter, which covers only the main hydrographic basins, is also available. The two DTMs have been transformed into the same reference frame. The cross-validation of the two datasets has been performed comparing the low resolution DTM with the local high resolution DTM. Then, where significant differences are present, GPS survey have been used as external validation. The results are presented. Moreover, a possible strategy for the future fusion of the data, is shortly summarized at the end of the paper.



Click To View

Additional Books

  • Real Time Integration of Field Data Into... (by )
  • Interactive 3D Landscapes on Line : Volu... (by )
  • Direct Photogrammetry Using Uav: Tests a... (by )
  • Assessment of Slope Stability Using Ps-i... (by )
  • Phenological Tracking Og Agricultural Fe... (by )
  • Review of Methods for Determining the Sp... (by )
  • Exploitation of the Full Potential of Pe... (by )
  • From the Questioning of the Archaeologis... (by )
  • Atmospheric Correction Comparison of Spo... (by )
  • Optimization of Decision-making for Spat... (by )
  • Attitude Assessment Using Pleiades-hr Ca... (by )
  • Scan Registration Using Planar Features ... (by )
Scroll Left
Scroll Right


Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.