[H-TT17] Environmental Remote Sensing

[HTT17-P12] A Comparison Analysis of the Land Use Change Detected by Satellite Imagery and the Ground Patrol

*Shih-Wen Yeh¹, Chi-Farn Chen¹, Yao-Cheng Kuo¹ (1.Center for Space and Remote Sensing Research, National Central University)

Keywords:Satellite Monitoring, Ground Patrol, Change Detection

Over the past decades, economic patterns in Taiwan has been transferred from agricultural-based society to industrial-based society. The land-use changes and rate of development in slope areas are increasing. In order to reduce illegal land-use developments in the slope areas, the government has been applying two projects: one is the satellite monitoring, the other is the ground patrol. The purpose of this study is to analyze the differences of the monitoring results of the satellite monitoring and the ground patrol. The satellite monitoring project uses SPOT6/7 satellite images (1.5-meter spatial resolution) to carry out a large-scale and multi-temporal monitoring on land-use changes, and then the investigators will implement the field inspection and examine the legality of the use of the land. For the ground patrol project, the investigators employ the mobile devices to patrol the roads near the slope areas. If the change areas are suspected to be used illegally, the investigators will report the results back to the land authority in time. The comparison result indicates that the average change areas (2,000 m²) of the satellite monitoring project is larger than the one (300 m²) of the ground patrol project. Additionally, the average distance between the change areas and the roads (100 m) of the satellite monitoring project is longer in comparison with the ground patrol project (8 m). As stated above, the change areas of the satellite monitoring is larger and most of the locations is away from the roads in comparison with the ground patrol project. Since the satellite monitoring is limited by the image resolution (1.5 meter), the detection of the change area less than 100 m² would be a job with great difficulty. In addition, the ground patrol is restricted by the patrol route and sometimes blocked by the obstruction, so the change areas consequently are not found adequately. The study suggests that the integration of the satellite monitoring and periodical ground patrol can construct an all-round method to monitor land-use changes in the slope areas. Furthermore, the data collected by both projects can be used to develop a cluster method to predict hotspots of the change areas. It can provide the reference information to improve the land management, and avoid the unnecessary investigations due to the limited resources and manpower.