1. Home page
  2. Search

Vertical accuracy of the SRTM DTED level 1 of Crete

This item is provided by the institution :
National Technical University of Athens   

Repository :
Digital Library of National Technical University of Athens | Dspace@NTUA   

see the original item page
in the repository's web site and access all digital files if the item*



Vertical accuracy of the SRTM DTED level 1 of Crete (EN)
Miliaresis, GCh (EN)
Paraschou, CVE (EN)
journalArticle (EN)
2014-03-01T01:23:19Z
2005 (EN)
A reference digital elevation model (DEM), produced from contour lines digitization, from topographic maps at scale 1:250.000 is used in order to assess the vertical accuracy of the SRTM DTED level 1 in Crete Island in Southern Greece. The error image interpretation revealed three types of systematic errors: (a) stripping, (b) large voids and (c) those errors resulted from the mis-registration of the Shuttle Radar Topography Mission (SRTM) imagery to the local datum. Terrain was segmented to plane regions and sloping regions. Sloping regions were segmented to aspect regions (aspect being standardized to the eight geographic directions defined in a raster/grid image). Error statistics was computed for the study area as well as the individual terrain classes. Vertical accuracy was found to be terrain class dependent. Sloping regions present greater mean error than the plane ones. Statistical tests verified that the difference in mean error between aspect regions that slope in opposite geographic directions is statistically significant. The greater mean error is observed for SW, W and NW aspect regions. The additional finishing steps applied to the SRTM dataset were not sufficient enough for the systematic errors and the terrain class dependency of the error to be corrected. The observed root-mean-square error (RMSE) for the SRTM DTED-1 of Crete do not fulfil the 16 m RMSE specification for the SRTM mission while the USA national map accuracy standards for the scale 1:250.000 are satisfied. (c) 2005 Elsevier B.V. All rights reserved. (EN)
Remote Sensing (EN)
Crete (EN)
digital elevation model (EN)
digital terrain model (EN)
Eurasia (EN)
Europe (EN)
World (EN)
Greece (EN)
synthetic aperture radar (EN)
Accuracy (EN)
Terrain analysis (EN)
Interferometric synthetic aperture radar (EN)
accuracy assessment (EN)
Terrain segmentation (EN)
Eastern Hemisphere (EN)
Southern Europe (EN)
Digital elevation models (EN)
SRTM (EN)
International Journal of Applied Earth Observation and Geoinformation (EN)
English
ELSEVIER SCIENCE BV (EN)
National Technical University of Athens
Digital Library of National Technical University of Athens | Dspace@NTUA
Κεντρική Βιβλιοθήκη Ε.Μ.Π.
Ιδρυματικό Αποθετήριο
Δημοσιεύσεις μελών Δ.Ε.Π. σε περιοδικά



*Institutions are responsible for keeping their URLs functional (digital file, item page in repository site)