| DEM在林地表面积计算中的应用研究 |
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| 引用本文： | 陈吉龙,武伟,刘洪斌. DEM在林地表面积计算中的应用研究[J]. 西南农业学报, 2008, 21(5) |
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| 作者姓名： | 陈吉龙 武伟 刘洪斌 |
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| 作者单位： | 1. 西南大学资源环境学院,重庆400716;重庆市数字农业重点实验室,重庆400716
2. 西南大学计算机与信息科学学院,重庆400716;重庆市数字农业重点实验室,重庆400716 |
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| 基金项目： | 重庆市科学技术委员会重点攻关项目，重庆市教委资助项目 |
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| 摘 要： | 土地的表层利用情况与人类的生产生活息息相关,而对于土地利用中处于斜坡上的林地来说,其表面积比投影面积更具有意义,然而目前还没有找到一种高效、精确的计算其表面积方法;本文以重庆江津市为研究区域,利用等高线模拟地形,运用微积分的方法对林地的表面积的计算方法进行了探讨;研究结果表明在数据有限的情况下,此方法能够比较准确的计算林地的表面积,且比用投影面积乘以坡度的平均正割值所计算的面积更精确。
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| 关 键 词： | DEM 林地 表面积 积分 |
Calculation of the surface area of forestland using DEM |
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| CHEN Ji-long,WU Wei,LIU Hong-bin. Calculation of the surface area of forestland using DEM[J]. Southwest China Journal of Agricultural Sciences, 2008, 21(5) |
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| Authors: | CHEN Ji-long WU Wei LIU Hong-bin |
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| Abstract: | The surface land-use state had some close relation to human.For the forestland,the surface area was more meaningful than the projected area.However,an effective and precise method for calculating the surface area was not excogitated up to now.Taking the Jangjing county as the study region,using the contour to simulate the terrain,this study explored the method for calculating the forestland surface area with the method of calculus.The result showed that this method can be used to calculate the forestland surface area in the case of the limitation of data,moreover,the result was much more precise than that calculated by multiplying the projected area by secant of the average slope. |
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| Keywords: | DEM forestland surface area calculus |
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