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基于CCD超站儀的森林樣地建立與精測方法研究
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國家自然科學(xué)基金面上項目(41371001)和北京市科技專項(Z15110000161596)


Establishment and Precise Measurement of Forest Sample Plot Based on CCD Super Station
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    摘要:

    為了能夠快捷、精準(zhǔn)地進(jìn)行固定樣地定位和樣木胸徑測量,提出一種利用CCD超站儀按測帶進(jìn)行像對觀測的方法,,在GPS/RTK確定或假定的觀測點上架設(shè)儀器,,借助全站儀坐標(biāo)測量和角度測量功能精確記錄CCD攝影瞬間的外方位元素,,并確定出其他觀測點坐標(biāo),選擇合適基線長建立像對進(jìn)行觀測,,提取目標(biāo)位置的相對三維坐標(biāo),,以“S”形路線按測帶進(jìn)行測量,配合少量的人工補(bǔ)測和相關(guān)坐標(biāo)系的旋轉(zhuǎn)變換,,實現(xiàn)森林固定樣地精準(zhǔn)建立和胸徑精測的目的,。通過實地測試,表明利用該方法能夠以較少的站點實現(xiàn)固定樣地的建立,,并將圖像解算的胸徑值與實地調(diào)查值進(jìn)行對比,,其平均相對誤差為3.9%,解算均方根誤差為1.2cm,。該方法在森林樣地建立中有較好的應(yīng)用前景,。

    Abstract:

    The accurate establishment of forest sample plot plays a key role in capturing the parameters characteristics and reveals the regular variation of the forest. To quickly and precisely measure the fixed constructions and trees of sample plots, methods which used CCD super station to carry out image pair observation of measuring tape were proposed. Setting up the instruments in the observation point was determined by the GPS/RTK with the help of total station coordinate measurement and angle measurement function to accurately record the exterior orientation elements of the CCD moment photography. To determine the coordinates of other observation points, the appropriate baseline length to establish the image pair observation was selected in order to extract the relative threedimensional coordinates of the target location. The measuring tape method with the “S” type route, with a small amount of artificial repair and related coordinate system rotation transformation were carried out, to achieve the precise establishment of forest fixed sample and the diameter measurement. The experimental results showed that the proposed method can be used to achieve the establishment of fixed sample plots with fewer sites, and the DBH calculated by the photos were compared with field survey value. The average relative error was 3.9%, and the root mean square error was 1.2cm respectively. The proposed method has good application prospect in forest sample plot establishment.

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劉金成,黃曉東,楊立巖,馮仲科.基于CCD超站儀的森林樣地建立與精測方法研究[J].農(nóng)業(yè)機(jī)械學(xué)報,2016,47(11):316-321. Liu Jincheng, Huang Xiaodong, Yang Liyan, Feng Zhongke. Establishment and Precise Measurement of Forest Sample Plot Based on CCD Super Station[J]. Transactions of the Chinese Society for Agricultural Machinery,2016,47(11):316-321.

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  • 收稿日期:2016-05-19
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  • 在線發(fā)布日期: 2016-11-10
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