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照相法结合遥感分类法测量苔藓群落盖度的初探

时间:2020-06-28 19:20来源:毕业论文
通过运用照相法结合遥感解译对20个在野外进行拍照的样方,将其在ENVI5.1软件里进行最大似然法监督分类分类解译,从而提取苔藓盖度信息,并与人工测量盖度读取的结果进行比较,应

摘要植被覆盖度的准确性能够呈现出植物是否健康。传统的苔藓植物盖度的调查有网格法、目估法等,近年来也有国外专家提出并证实照片解译法在苔藓盖度测量中的可靠性,在国内利用照片解译法研究苔藓植物群落盖度的研究尚为少见。本文通过运用照相法结合遥感解译对20个在野外进行拍照的样方,将其在ENVI5.1软件里进行最大似然法监督分类分类解译,从而提取苔藓盖度信息,并与人工测量盖度读取的结果进行比较,应用SPSS20.0软件,基于单因素方差分析, F=0.040,P = 0.843>0.05,结果表明,两组数据差异不显著。结果表明照相法结合遥感软件解译来提取苔藓植被盖度的方法具有一定的可行性且精度优于传统方法。51705

毕业论文关键词:数码照片;感兴趣区;遥感解译;图像分类

Abstract:

Vegetation coverage is one of the important parameter to characterize ecosystem, it has an important indication for the precise measurement to analyze and evaluate the health of the ecosystem. The traditional bryophytes coverage survey includes grid, visual estimation and so on. In recent years, the photographically interpretation survey has been proposed and proven reliable by the foreign experts in moss coverage measurements, which, however, is still rare to use in the domestic. In this essay, the photographically interpretation combining the remote sensing interpretation are used here to interpret the 20 sample plots photoed in the field, which then are classifiably supervised and interpreted through using the maximum likelihood method in ENVI5.1 software to extract moss coverage information and compare them with the manual measurement results. Based on the One-Way ANOVA analysis, F = 0.040, P = 0.843> 0.05 from the SPSS20.0 software analyzing, the results showed no significant difference between the two data sets. Conclusively, the combination of photographically interpretation with remote sensing interpretation method turns to be more accuracy than the traditional method to extract the moss vegetation coverage feasibly.

Keywords:digital photos;region of interest;remote sensinginterpretation;image classification

目录

摘要 2

1.引言 4

1.1植被覆盖度概述 4

1.2研究目的及意义 5

2.材料与方法 6

2.1试验材料 6

2.2试验方法 6

3.结果与分析 10

3.1所要考虑到的因素 10

3.2得到的结果分析 11

4.总结和讨论 12

5.参考文献 13

6.致谢 14

1.引言

1.1植被覆盖度概述

植被覆盖度被用于生态系统征象的考察中,其是一个很重要的生态参数,能够对于植物的生长状况以及土地的退化度等要素具体的呈现出来。植被覆盖度是指包括乔、灌、草和农作物在内所有植被的冠层、枝叶在生长区域地面的垂直投影面积占生长区域面积的百分比(秦伟等,2006),它不仅反映了植被生长的状况及其变化特征,同时也是影响地球水、碳循环的重要因素,是评价生态系统健康与否的重要指示因子。优劣性的植被盖度测量方法对于植被盖度的测量结果有着很大的影响,在在很大程度上会影响到结果的准确性和真实性。植被盖度的测定方法的发展大致经历了简单目测估算、仪器测量计算和遥感解译分析3 个阶段(秦伟等,2006)。目测估算法包括直接目估法、相片目估法、网格目测法等,仪器测量包括空间定量计法与移动光亮计法、传统近景摄影测量法和现代近景摄影测量法(也即照相法)等。 照相法结合遥感分类法测量苔藓群落盖度的初探:http://www.lwfree.com/shengwu/lunwen_55444.html

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