Application of remote sensing images to irrigation pond change analysis in Taoyuan

The industry and commerce rose after the agriculture descended. The landscape of ponds which contains many historical value, humanistic value and ecological value is now gradually disappearing at Taoyuan tableland. This research applies remote sensing images to observe the changing of the ponds. We can obtain the information from remote sensing images of objects indirectly and learn the usage of land by classifying the images. In this research, we apply Taiwan Bao-tu of Taoyuan in 1904, Corona satellite image of Taoyuan in 1969 and SPOT5 satellite image of Taoyuan in 2004 and 2014. The multispectral of near infrared and Short-Wave Infrared from SPOT5 satellite can classify the ponds effectively. However, the images of Corona satellite are panchromatic. We can rise the accuracy of the classification by texture analysis. In the analysis of textural features, the most influential part is to choose the moving window size. Furthermore, there is unapparent difference between six methods of texture statistics that can use to remote sensing. Also, we can eliminate the clutter of farmland pixel form ponds pixel by the skill of inference. As a result, from 1904 to 1969, the reason of transition is the development of water facilities that merging the ponds, the construction of the Tao-Yuan Irrigation Association and the vast construction for developing Taipei through the history and the change of patterns. Then from 1969 to 2004, because of the build of Shihmen Reservoir and Shihmen Irrigation Association, the function of the ponds gradually declined. Industrial development made the ponds near urban disappeared. The last part from 2004 to 2014, the industrial development in Taoyuan reached to the ceiling and people began to aware the importance of our environment and the sustainable development of the agriculture in Taiwan. For this cause, people and many social organizations started to protect the ponds. The government also legislates regulation to protect the ponds.