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    Please use this identifier to cite or link to this item: http://nccur.lib.nccu.edu.tw/handle/140.119/4825


    Title: 應用空載雷射掃描系統推估森林結構特性之研究
    Other Titles: Estimation of Forest Structural Characteristics Using Airborne Lidar
    Authors: 詹進發
    Keywords: 光達;航空測量;表面高程模型;地形高程模型;森林植被高度
    Lidar;Photogrammetry;Surface elevation model;Terrain elevation model;Forest canopy height
    Date: 2003
    Issue Date: 2007-04-18 18:23:52 (UTC+8)
    Publisher: 臺北市:國立政治大學地政學系
    Abstract: 森林之組成與垂直結構提供了重要的資訊,有助於了解森林生態系之生態狀態與過程,近年來光達技術的發展,促進了應用光達於調查森林植被結構之研究。本研究之目的為發展應用雷射掃描儀獲取林分結構特性之方法,使用之資料為利用 Leica ALS40 掃描闊葉樹林所產生的資料。為了評估光達用於估測林分之植被高 度的能力,本研究以光達資料萃取出表面高程模型與地形高程模型,並將其與航測方法所產生的表面高程模型及 4 公尺的地形高程模型做比較。林分植被高度模型以表面高程模型與地形高程模型之差表示之,本研究亦將光達與航測兩者所產生之植被高度模型作一比較。研究結果顯示, 光達可提供深具價值之量測數據以供推估植被高度。
    Forest composition and vertical structure provide essential information for understanding the ecological state and process in forest ecosystems. Recent development of lidar technologies has led to applications of lidar in forest canopy structure investigation. The objective of this study was to develop a method to derive forest stand structure characteristics from laser scanning instrument. Lidar data, acquired using Leica ALS40 airborne laser scanner, of a deciduous forest was used in this study. In order to assess the capability of lidar for estimating canopy height of forest stands, surface and terrain elevation model derived from lidar data were compared to the surface elevations generated using photogrammetric technique and a 4-meter digital elevation model. In addition, the forest canopy height model, represented by the difference of the surface elevation model and terrain elevation model, was compared to measurements from the photogrammetric process. The results indicate that lidar can provide valuable measurements for estimation of forest canopy height.
    Description: 核定金額:588500元
    Data Type: report
    Appears in Collections:[地政學系] 國科會研究計畫

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