• Adrijana Car – Thomas Jekel – Josef Strobl – Gerald Griesebner (Eds.)

GI_Forum 2019, Volume 7, Issue 2

Journal for Geographic Information Science

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Verlag der Österreichischen Akademie der Wissenschaften
Austrian Academy of Sciences Press
A-1011 Wien, Dr. Ignaz Seipel-Platz 2
Tel. +43-1-515 81/DW 3420, Fax +43-1-515 81/DW 3400
https://verlag.oeaw.ac.at, e-mail: verlag@oeaw.ac.at

GI_Forum publishes high quality original research across the transdisciplinary field of Geographic Information Science (GIScience). The journal provides a platform for dialogue among GI-Scientists and educators, technologists and critical thinkers in an ongoing effort to advance the field and ultimately contribute to the creation of an informed GISociety. Submissions concentrate on innovation in education, science, methodology and technologies in the spatial domain and their role towards a more just, ethical and sustainable science and society. GI_Forum implements the policy of open access publication after a double-blind peer review process through a highly international team of seasoned scientists for quality assurance. Special emphasis is put on actively supporting young scientists through formative reviews of their submissions. Only English language contributions are published.

Starting 2016, GI_Forum publishes two issues a Year.
Joumal Information is available at: GI-Forum
GI_Forum is listed on the Directory of Open Access Journals (DOAJ)

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GI_Forum 2019, Volume 7, Issue 2

ISSN 2308-1708
Online Edition

ISBN 978-3-7001-8669-4
Online Edition



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Verlag der Österreichischen Akademie der Wissenschaften
Austrian Academy of Sciences Press
A-1011 Wien, Dr. Ignaz Seipel-Platz 2,
Tel. +43-1-515 81/DW 3420, Fax +43-1-515 81/DW 3400
https://verlag.oeaw.ac.at, e-mail: bestellung.verlag@oeaw.ac.at
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Assessing Shrub and Tree Encroachment in Alpine Pastures from Airborne Laser Scanning Data

    Christoph Giger

GI_Forum 2019, Volume 7, Issue 2, pp. 73-80, 2019/12/11

Journal for Geographic Information Science

doi: 10.1553/giscience2019_02_s73

doi: 10.1553/giscience2019_02_s73


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doi:10.1553/giscience2019_02_s73



doi:10.1553/giscience2019_02_s73

Abstract

The forest area in alpine regions is increasing. Agricultural land is abandoned; shrub and tree encroachment and reforestation are the consequences, with negative impacts on agriculture, biodiversity and tourism. Assessing encroachment on agricultural land from Airborne Laser Scanning (ALS) data was tested in three study areas in Switzerland. The results of the data evaluation were compared with those for manually collected data from the interpretation of orthophotos. The evaluation indicated that when a higher point density was available, the detection rate for areas with shrub and tree encroachment was also higher. The workflow using the Vertical Complexity Index (VCI) turned out to be robust for both large areas and large datasets. The accuracy levels achieved in this study for the encroachment index may provide a solid basis for prioritizing certain areas for projects that aim to limit the process of reforestation.

Keywords: airborne laser scanning ALS, secondary succession, shrub and tree encroachment, change detection

Published Online: 2019/12/11 13:51:07

Object Identifier: 0xc1aa5572 0x003b1762

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Rights: https://creativecommons.org/licenses/by-nd/4.0/