DBPapers

SYSTEM FOR DIGITAL ELEVATION MODEL GENERATION FROM LIDAR DATA

AUTHOR/S: S. PECNIK, D. MONGUS, B. ZALIK
Sunday 1 August 2010 by Libadmin2010

10th International Multidisciplinary Scientific GeoConference - SGEM2010, www.sgem.org, SGEM2010 Conference Proceedings/ ISBN 10: 954-91818-1-2, June 20-26, 2010, Vol. 1, 957-964 pp

ABSTRACT

Recent advances in remote sensing have changed conventional ways of collecting and
processing elevation data. Especially Light Detection and Ranging (LiDAR) has
become one of the leading technologies for rapid acquisition of elevation data. In this
paper we present a system for digital elevation model (DEM) construction from LiDAR
data. First, we present a visualization technique that allows efficient representation for
LiDAR data processing. This makes the data segmentation, which is the key step in
DEM generation, possible to be performed efficiently, with higher precision, and
reliable. For the purpose of the data segmentation, points can be projected on an
arbitrary plane, parallel with Z axis (cross section). This allows users to get better
control over the points by allowing measurements of distances and angles between
them. After the ground points are obtained, DEM can be generated. Usually ground
points are re-sampled first into a required DEM grid resolution and then triangulated.

Keywords: Light Detection and Ranging, digital elevation model, point visualization, segmentation, triangulation