根据地学信息图谱理论与地球空间信息认知理论,利用西安市1988、2000、2007年三期遥感影像,分析西安市1988-2007年间土地利用时空演变过程;利用PSR模型构建了西安生态安全评价指标体系,借助AHP法确定权重,采用遥感影像确定模型中的自然组分数据,结合社会经济统计数据,对生态安全动态进行了尝试性评价;将土地利用图与生态安全评价图做叠置分析,得到了生态安全状态与土地利用格局间的内在联系。
Based on the geo-information-TUPU theory and geo-space information theory, this paper analyzes the temporal and spatial change of the land use in Xi'an during 1988-2007 by using the remote sensing images in 1988, 2000 and 2007. The ecological security evaluation indicator system of Xi' an is set up by using PSR model. By means of AHP, it evaluates the ecological security dynamics combined with the social and economic data using remote sensing images to determine the natural component data. Then after making an overlap analysis over the land use map and ecological security evaluation map, it finds the interrelationship between the ecological security status and land use pattern.