The application of Remote Sensing and GIS for forest cover monitoring.
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The application of Remote Sensing and GIS for forest cover monitoring. 学 生:阿 玛 娜 导 师: 刘耀林 教授 - PowerPoint PPT Presentation


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The application of Remote Sensing and GIS for forest cover monitoring. 学 生:阿 玛 娜 导 师: 刘耀林 教授 学 号: 200322050175 专 业:地图学与地理信息系统 单 位:资源与环境科学学院. Content of Thesis. 1. General introduction and study objectives 2. Study area and methodological approach

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The application of Remote Sensing and GIS for forest cover monitoring.

学 生:阿 玛 娜

导 师: 刘耀林 教授

学 号:200322050175

专 业:地图学与地理信息系统

单 位:资源与环境科学学院


Content of thesis
Content of Thesis monitoring.

1. General introduction and study objectives

2. Study area and methodological approach

3. Experimental analysis and result

4. Future work and conclusions


General introduction and study objectives
General introduction and study objectives monitoring.

  • Sustainable management of natural forests has been a worldwide issue after the United Nation's Convention on Environment and Development held in June 1992. Many organizations are involved in development of such principle, criteria and indicators at national and international level.

  • Furthermore, forest resource is the important material foundation of national sustainable development. And it need to master the status and change of forest resource timely for reasonable exploitation of forest and its renewal.


Specific objective of this study
Specific objective of this study monitoring.

1. How to apply remote sensing and GIS data for forest cover monitoring

2. Using GIS tools to covert map projection from different datum

3.    To deal the work with Image processing, image classification

4.      To process image Enhancements/transformation, there are the normalized difference index (NDVI) and the Principal components analysis (PCA)

5. To determine the area of forest cover change


Study area
Study area monitoring.

  • Laos is located in the heart of the Indochinese peninsular, in southeast Asia, latitude 14° to 23 °north and longitude 100°to 108°east, covered a total 236, 800 square kilometers, and country of nearly 6 million people.

  • Laos is in the tropical zone, and the weather is influenced by monsoons

  • The study region is located in the southern part of Laos (106°30´ 00 - 107°00´ E, 14°40´ 00 - 15°00´ N) to be chosen as a simple of study



Data sources and review literatures
Data sources and review literatures ETM +image

  • In the study, we got some document data ,forest land cover map in 1997 and index map (administrative border), and Landsat ETM+ data from National Geographic Department, National Agriculture and Forestry Intension Service, and National Agriculture and Forestry Research Institute.


Available Data ETM +image


The first part of the study, analysis forest land cover map in 1997, and type of forest classification. From original forest land cover map, we re-append the legend map to be clearly on training simple for image classification as following

1) Evergreen by 11, 12, 13 code ( high , medium, low cover density),

2) Mixed (evergreen and deciduous)by17,18and19 code,high- medium-low cover density,

3) Deciduous and deciduous mosaic by 20 and 22 code,

4)Re-growth and inundated by 40 and 41 code

5) Non forest area which are included : wood, scrubland, evergreen and grassland ( by 61,62, 81, 82 code)

6) Agriculture land, barren land, Urban and built up over area ( by 91 and 92 code).


Forest land cover map in 1997
Forest land cover map in 1997 in 1997, and type of forest classification. From original forest land cover map, we re-append the legend map to be clearly on training simple for image classification as following


Software application

Soft package in 1997, and type of forest classification. From original forest land cover map, we re-append the legend map to be clearly on training simple for image classification as following

Used for

ArcView3.2, ArcMap

View data, make legend, check attribute data

Arc/Infor

Check Info. Data, Split map, map projection and conversion

ERDAS 8.6

Image processing and image analysis

Microsoft Word

Word processing

Software application


Methodology approach
Methodology Approach in 1997, and type of forest classification. From original forest land cover map, we re-append the legend map to be clearly on training simple for image classification as following


Experimental analysis and result
Experimental analysis and result in 1997, and type of forest classification. From original forest land cover map, we re-append the legend map to be clearly on training simple for image classification as following

Simple of training data using AOI tools for signature editor, plus with experience of specialist, and analysis forest land cover map in 1997, then we classified image of 2002 into 3 classes :

1) Forest,

2) Non Forest

3) Water body.


Image before classification and after classification
Image before classification and After classification in 1997, and type of forest classification. From original forest land cover map, we re-append the legend map to be clearly on training simple for image classification as following


Estimating area variation by remote sensing
Estimating area variation by remote sensing in 1997, and type of forest classification. From original forest land cover map, we re-append the legend map to be clearly on training simple for image classification as following


Accuracy assessment
Accuracy assessment in 1997, and type of forest classification. From original forest land cover map, we re-append the legend map to be clearly on training simple for image classification as following

  • Kappa analysis (Cohen, 1960; R. G. Congalton & Mead, 1983; Stehman, 1996) is a currently popular multi-variable technique for accuracy assessment. The estimate of kappa is called KHAT statistic, and gives a measure indicates if the error matrix is significantly different from a random result.


Accuracy assessment1
Accuracy assessment in 1997, and type of forest classification. From original forest land cover map, we re-append the legend map to be clearly on training simple for image classification as following


Image analysis
Image analysis in 1997, and type of forest classification. From original forest land cover map, we re-append the legend map to be clearly on training simple for image classification as following

  • The normalized different vegetation index (NDVI) has been most widely used index in global vegetation studies .

  • The transformation of the raw satellite images using principal components analysis (PCA) can result in new principal component images that may be more interpretable than the original data


Relation between tm bands and pixel data
Relation between TM bands and pixel data. in 1997, and type of forest classification. From original forest land cover map, we re-append the legend map to be clearly on training simple for image classification as following


Flow chart of spectral enhancement on etm image
Flow chart of spectral enhancement on ETM image in 1997, and type of forest classification. From original forest land cover map, we re-append the legend map to be clearly on training simple for image classification as following


Next classification for image analysis, we selected bands 1,2,5,7 from normalization stretches with NDVI ,using supervised (maximum likelihood classification)

Distribution of Land cover image base on bands 1,2,5,7 and NDVI







The classification of forest cover is an important element in both forest resources management and scientific research issues.

By power tools of Remote sensing and GIS, the final work we classify forest into 3 classes:

(1) forest high cover density,

(2) Forest medium, low cover,

(3) Forest mosaic.


Forest mask to classify forest into 3 classes
Forest mask to classify forest into 3 classes in both forest resources management and scientific research issues.


Result of forest classification image data
Result of forest classification image data. in both forest resources management and scientific research issues.


Future work and conclusions
Future work and conclusions in both forest resources management and scientific research issues.

  • Forest cover types information in case of our study is extracted from the Landsat 7 ETM+ image, and base on classification of image, using maximum likelihood of supervised method,

  • we can determine the area of forest cover change during period time 5 years, the forest cover have been decrease about 17% to compare with the forest cover map in 1997 in that area .

  • Forest cover were changed a lot during period 5 year. To be seen clearly , we overlaid and compare between forest map cover in 1997 and Landsat image in 2002, mostly forest over medium, low cover density, deciduous and deciduous mosaic have been decreased


  • As result accuracy assessment, for the first classification, the result showed overall accuracy and kappa statistics 87.15% and 0.75 . For the second and third, we classified data base one PCA and NDVI, the result of accuracy assessment are better than the first one with overall accuracy (90.50% , 0.83 ) and (93.30% , 0.87).

  • Image analysis have been effected in quality of classification data. In case of our study, Water body showed clearly after preferment classification data with PCA and NDVI.


谢谢各位老师! the result showed overall accuracy and kappa statistics 87.15% and 0.75 . For the second and third, we classified data base one PCA and NDVI, the result of accuracy assessment are better than the first one with overall accuracy (90.50% , 0.83 ) and (93.30% , 0.87). 欢迎提出宝贵意见和建议!


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