Journal of the Japan society of photogrammetry and remote sensing
Online ISSN : 1883-9061
Print ISSN : 0285-5844
ISSN-L : 0285-5844
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Volume 53, Issue 2
Displaying 1-9 of 9 articles from this issue
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Preface
  • Correlation Analysis of Total Coliform and Land Use Data
    Toru HIRAOKA, Kenta KUBOTA, Hirofumi NONAKA, Takashi FURUKAWA
    2014 Volume 53 Issue 2 Pages 62-66
    Published: 2014
    Released on J-STAGE: May 01, 2015
    DOIhttps://doi.org/10.4287/jsprs.53.62
    JOURNAL FREE ACCESS
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    We analyze and evaluate a correlation of total coliform and land use data on a monthly basis in the downstream of Oita River. In addition,we analyze and evaluate the optimal range to use laser profiler data from the total coliform's observation points. As a result of the analysis, we found that the correlation of building land is high in land use, and the correlation of total coliform of March and June is high in the case of using land use data of about 2.0 km radius.
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  • Comparison of DSMs derived from UAV-SfM method and terrestrial laser scanning
    Hiroyuki OBANAWA, Yuichi S.HAYAKAWA, Hitoshi SAITO, Christopher GOMEZ
    2014 Volume 53 Issue 2 Pages 67-74
    Published: 2014
    Released on J-STAGE: May 01, 2015
    DOIhttps://doi.org/10.4287/jsprs.53.67
    JOURNAL FREE ACCESS
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    In the last few years, SfM (Structure from Motion) based on photographs taken from UAV (Unmanned Aerial Vehicle) has attracted a tremendous amount of interest for the creation of DSM (Digital Surface Model) and other morphometric products. However, the accuracy of the derived DSM hasn't been sufficiently evaluated yet. Therefore, the present contribution aims to compare UAV-based SfM data against TLS (Terrestrial Laser Scanning) derived DSM data. The fieldwork was carried out on a wave-cut bench in Kanagawa Prefecture (Japan). Results have indicated that DSM data derived from UAV-SfM can create a point cloud of comparable density to the one created by TLS, with a maximum deviation of 10 cm from the TLS data. The UAV-SfM technique has a great potential for a wide range of application, because of its high data accuracy, low acquisition and operational costs, allowing high spatial and temporal data recording.
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  • Interpolation of DEM by Using Iterative Bilateral Filter
    Ryuji SATO, Toru HIRAOKA, Hirofumi NONAKA, Toru TAKAMI
    2014 Volume 53 Issue 2 Pages 75-79
    Published: 2014
    Released on J-STAGE: May 01, 2015
    DOIhttps://doi.org/10.4287/jsprs.53.75
    JOURNAL FREE ACCESS
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    Currently, a DEM (Digital Elevation Model) of high density range has been able to be created by spread of airborne laser scanner. However, when the DEM is created, the points of the DEM can not be interpolated accurately in some cases. Therefore, we propose a method of accurately interpolating the points of the DEM. The proposed method is performed by using iterative bilateral filter. Through the experiments using the DEM of 5m mesh, we demonstrate the effectiveness of our interpolation method.
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