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Kalev Julge, Artu Ellmann
Combining Airborne and Terrestrial Laser Scanning technologies for measuring complex structures
| Conference Information: |
9th International Conference “Environmental Engineering”, 22–23 May 2014, Vilnius, LITHUANIA |
| Source: |
ICEE-2014 - International Conference on Environmental
Engineering |
| Book Series: |
International Conference on Environmental Engineering
(ICEE) Selected papers |
| ISSN: |
eISSN 2029-7092 online |
| ISBN: |
eISBN 978-609-457-640-9 |
| ISBN: |
ISBN 978-609-457-690-4 CD |
| Year: |
2014 |
| Publisher: |
Vilnius Gediminas Technical University Press Technika |
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Abstract
In recent years using laser scanning has gained popularity
in measuring different objects, complementarily to traditional
surveying and mapping methods. Terrestrial Laser Scanning (TLS)
is often used for high-resolution accurate data acquisition of
complex structures such as buildings, facades, etc. Airborne Laser
Scanning (ALS) on the other hand can be used for remote surveying
of large areas. Although TLS and ALS are generally used in separate
applications, there are some possibilities where they may efficiently
complement each other. In this study TLS and ALS data are combined for
surveying a water tower where the façade is measured with TLS and the
roof-top with standard high-elevation ALS. The advantages and shortcomings
of using TLS along with ALS for measuring complex and non-standard structures
are analyzed, the possible sources for errors are determined and some
recommendations for methodology of field measurements and data processing
in order to eliminate/reduce systematic errors are given. The estimated
accuracy of combining TLS and ALS data after implementing the necessary
adjustments was found to be about 5 cm.
Keywords:LIDAR; Airborne Laser Scanning; Terrestrial Laser Scanning; Point Cloud.
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