XXII ISPRS Congress 2012: Technical Commission VII

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Multivolume work

Persistent identifier:: 1663813779

Title:: XXII ISPRS Congress 2012

Sub title:: Melbourne, Australia, 25 August-1 September 2012

Year of publication:: 2013

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663813779

Language:: English

Additional Notes:: Kongress-Thema: Imaging a sustainable future

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Document type:: Multivolume work

Volume

Persistent identifier:: 1663821976

Title:: Technical Commission VII

Scope:: 546 Seiten

Year of publication:: 2013

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663821976

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(39,B7)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist ermittelt.; Literaturangaben

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: [VII/7, III/2, V/3: WAVEFORM LIDAR FOR REMOTE SENSING]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: FULL WAVEFORM LIDAR EXPLOITATION TECHNIQUE AND ITS EVALUATION IN THE MIXED FOREST HILLY REGION S. Chhatkuli, K. Mano, T. Kogure, K. Tachibana, H. Shimamura

Document type:: Multivolume work

Structure type:: Chapter

International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B7, 2012 XXII ISPRS Congress, 25 August — 01 September 2012, Melbourne, Australia FULL WAVEFORM LIDAR EXPLOITATION TECHNIQUE AND ITS EVALUATION IN THE MIXED FOREST HILLY REGION S. Chhatkuli ^ *, K. Mano?, T. Kogure ®, K. Tachibana ® H. Shimamura ® * PASCO CORPORATION, R & D Center, 2-8-11 Higashiyama, Meguro Ku, Tokyo, Japan (cshahb7460, teorsu8478, kainka9209, hairdu9189)@pasco.co.jp ® PASCO CORPORATION, MMS Division, 1-2-3 Minatomachi, Naniwa-ku, Osaka, Japan, koonua2121@pasco.co.jp Commission VII, Theme Session VII/7, III/2, V/3 KEY WORDS: LIDAR, Analysis, DEM/DTM, Point Cloud, Accuracy ABSTRACT: In this paper a full waveform exploitation technique and its evaluation in the mixed forest hilly region is presented. The increment in ground penetration by using the full waveform exploitation technique compared to the discrete LiDAR pulses during autumn and winter season is evaluated. The results showed that the technique used for the full waveform exploitation has effectively increased the ground penetration by 50 % and 20 %, respectively, during autumn and winter in the mixed forest hilly region compared to the discrete return pulses. The accuracy test of the LiDAR derived terrain model constructed from the discrete LiDAR pulses and full waveform LiDAR pulses obtained during autumn and winter has also been performed. The RMSE of the LiDAR derived DTM with Im grid size constructed from the discrete LIDAR pulses obtained during autumn and winter were 0.73 m and 0.22 m respectively. Likewise, the RMSE of the LiDAR derived DTM constructed from the full waveform LiDAR pulses obtained during autumn and winter were 0.59 m and 0.21 m respectively. The results also showed that by using full waveform return pulses, DTM constructed for both seasons were improved compared to the DTM generated from discrete LiDAR pulses. 1. INTRODUCTION This paper presents a robust full waveform exploitation technique which can effectively increase the ground penetration Recently, LiDAR systems that digitize and record entire echo —— and vegetation detection even during leaf on condition. For the waveform are increasingly available. By suitably exploiting the practical application of the full waveform exploitation full waveform return pulses, very weak or buried signals that ^ technique, objective analysis of total increment in ground were not recorded as discrete return pulses could also be detection and the validation of its accuracy are very important. detected. Hence, the accuracy evaluation of the ground penetration from the proposed full waveform exploitation technique and discrete The data collected as discrete return pulses during leaf-on ^ return pulses is also carried out. The total increment in ground condition may be ideal for determining canopy elevation but ^ penetration by using the proposed full waveform exploitation not ground elevation. Conversely, discrete laser pulses during technique against the discrete return pulses has been analyzed leaf-off condition may not provide good estimate of canopy for the mixed forest hilly region. The analysis is performed for height (Hodgson et.al, 2003). autumn (September) and winter (December) to investigate the changes in ground penetration due to the seasonal variation in Chauve et.al, (2008) performed the processing of full the forest condition as well. waveform LiDAR data to extract forest parameters and DTM. They found that detecting weak echoes, when processing full waveform data, enabled to better describe the canopy shape and 2. MATERIALS AND METHOD penetrate deeper into the forest cover compared to discrete return pulses. However, DTM was not significantly improved. LiDAR survey was performed in the Ogawa region Japan, Reitberger et.al., (2008) found that the tree shape is better which is located about 150 km north of Tokyo, on September detected by the full waveform data compared to discrete return 29 and December 5, 2010. Figure 1 shows the orthophoto of the pulses and it could also detect small trees in the lower forest area that has been demarcated for the analysis purpose. The layer. Pirotti (2011) presented the review of existing methods demarcated area is about 2km in length and 0.3km in width. for processing full waveform LiDAR data for the estimation of The study area is a mixed forest hilly region containing patches forest parameters. Depending on the full waveform exploitation of evergreen trees (E) like Japanese red pine trees, Japanese technique, certain models were applicable at either the plot or cedar trees, Japanese cypress trees and deciduous trees (D) like regional level, and some methods were influenced by leaf- Japanese beech trees and Japanese chestnut trees among other off/leaf-on condition. varieties. * Corresponding author. 505

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