AN ACCURACY ASSESSMENT OF SPOT HEIGHTS ON DIGITAL ELEVATION MODEL (DEM) DERIVED FROM ALS SURVEY: CASE STUDY OF ŁYSICA MASSIF
Journal Title: Structure and Environment - Year 2017, Vol 0, Issue 2
Abstract
The paper presents an analysis of ALS – derived DEM (created as part of ISOK project) of Łysica massif in Łysogóry range, Poland. The contour map, slope map, and cross sections of the massif were derived of DEM, and compared to reference data – an earlier cartographical elaborations, including topographical map 1:10000 and forest economical map 1:5000, and to field survey, conducted in 2016 sep. using GNSS and differential leveling methods. A high accuracy of DEM was confirmed, corresponding to requirements of ISOK project. The surveys revealed, that real elevations of the tops of Łysica massif vary from the values shown on topographical map 1:10000. According to precise GNSS and leveling surveys, the main top is higher by 1.2 m (GNSS measurement 613.4 m a.s.l., DEM measurement 613.14 m a.s.l.), and the eastern top, named Skała Agaty, being higher by 5 m (GNSS measurement 613.7 m.a.s.l., DEM measurement 613.4 m a.s.l.), and this top is actual highest point of Łysica massif and thus Świętokrzyskie mountains.
Authors and Affiliations
Maciej Hajdukiewicz, Ihor Romanyshyn
Keywords
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