GI_Forum 2015, Volume 3 Journal for Geographic Information Science
Geospatial Minds for Society
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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 |
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DATUM, UNTERSCHRIFT / DATE, SIGNATURE
BANK AUSTRIA CREDITANSTALT, WIEN (IBAN AT04 1100 0006 2280 0100, BIC BKAUATWW), DEUTSCHE BANK MÜNCHEN (IBAN DE16 7007 0024 0238 8270 00, BIC DEUTDEDBMUC)
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GI_Forum 2015, Volume 3 Journal for Geographic Information Science
Geospatial Minds for Society ISSN 2308-1708 Online Edition ISBN 978-3-87907-558-4 Print Edition ISBN 978-3-7001-7826-2 Online Edition
doi:10.1553/giscience2015
GI_Forum, 2015Volume 3 2015, 645 pages Print edition is available at Wichmann-Verlag, Berlin
Jan-Peter Mund,
Robert Wilke,
Michael Körner,
Alfred Schultz
S. 178 - 188 doi:10.1553/giscience2015s178 Verlag der Österreichischen Akademie der Wissenschaften
Abstract: Since two decades, the use of terrestrial laser scanning (TLS) and Airborne Light Detection and Ranging (LIDAR) has become very prominent in analysing 3D forest structures (AKAY et al. 2009). The potential of full waveform analysis of high density Airborne LiDAR data (ALS) for the detection and structural analysis of multi-layered forest stands is not yet well investigated (JASKIERNIAK et al. 2011), although ALS data provide exact information on tree heights of multi-layered forest stands using particular laser pulse characteristics (GAULTON & MALTHUS 2010). Since the mid-19th century, managed forests in Brandenburg have been dominated by Scots pine monocultures. In the last fifteen to twenty years many forest stands were converted into multi-layered mixed forests by silvicultural conversion of forests and natural succession (MLUR 2004). Today, the majority of forest stands in the federal state of Brandenburg remain dominated by Scots pine (Pinus sylvestris) in the canopy layer, while European beech (Fagus sylvatica) or Sessile oak (Quercus petraea) are predominant in the understorey. In this study, we investigate and discuss the potential of full waveform high density airborne LiDAR data (ALS) for detecting, classifying, and stratifying discrete vegetation layers at forest stand level, based on 0.1ha investigation plots. Full waveform high density ALS data on each 5th percentile level was used in combination with binary logistic regressions to discover the structural layer type of multi-layered forest stands from normalized discrete ALS pulses. The results of the descriptive statistics of ALS point clouds and binary logistic regression models produce particular forest layer profile indices of understorey vegetation and canopy layer. Such parameters can further be used as variables for forest structure analysis algorithms, and can be empirically tested against stand characteristics. The validation of ALS data and model results is tested against empirical forest mensuration data of the “Datenspeicher Wald 2 (DSW 2-Forest inventory data)” and field survey reference points using error matrices. We demonstrate that binary logistic regression analyses are functional for establishing a prediction model. The model was applied successfully on larger forest stands and forest areas, and can become useful for identifying and separating single from multi-layered forest stands using percentiles of total amounts of ALS return pulses on a 10x10m raster size with a high overall accuracy of 90%. The established model has the potential for a broad range of forest management applications, such as timber inventory evaluation, forest growth modelling, monitoring of vegetation dynamic and succession, as well as ecological classifications and the detection of deadwood in forest stands (KIM et al. 2009). Published Online: 2016/02/03 11:48:25 Object Identifier: 0xc1aa5576 0x0032b597 Rights: .
The Journal for Geographic Information Science issue 1-2015 presents peer-reviewed papers
presented at the Geoinformatics
Forum (www.gi-forum.org), held in Salzburg from July 7-10,
2015. The annual GI_Forum symposium provides a platform for dialogue among geospatial minds
in an ongoing effort to support the creation of an informed GISociety.
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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 |