取样程序

取样程序

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Contributor(s)

Initial contribute: 2018-12-04

Authorship

Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
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Method-focused categoriesData-perspectiveRemote sensing analysis

Model Description

Chinese {{currentDetailLanguage}} Chinese

取样程序

 

1)计算每一个单元中每一种植被覆盖类型的加权平均比所使用的公式:

 

 

式中,是区域单元中植被覆盖类型a的加权平均比;是植被覆盖类型a出现在横断面上的比例;是由所有横断面的平均长度分割开的横断面的权重因子;n是横断面的数量。

 

2)加权平均比例的标准差为:

 

 

式中,是取样单元中植被覆盖类型a的加权平均比的标准差;是所有横断面的总长度除以横断面的长度计算得到横断面的权重因子。

 

3)复合单元内每种植被覆盖类型的平均比例:

 

 

式中,是某一复合体中一种植被覆盖类型的平均比例;是某一单元中一种植被覆盖类型的加权平均比例;是单元的面积;是复合体中单元的总面积。

 

参考文献:

Thompson D C, Klassen G H, ClihlarJ; Keewatin, N.W.T.南部地区驯鹿栖息地绘图-数字Landsat应用,Journalof Applied Ecology,1980,17

How to Cite

《资源环境数学模型手册》 (2018). 取样程序, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/28080552-861e-4447-aaa7-e5315370e700
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History

Last modifier : 
tingxin
Last modify time : 
2020-10-29
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Contributor

Initial contribute: 2018-12-04

Co-contributor(s)

Authorship

Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
Homepage:  
View
Is authorship not correct? Feedback

History

Last modifier : 
tingxin
Last modify time : 
2020-10-29
Modify times : 
View History

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