基于高分一号卫星的城市扩张变化监测研究

廊坊是京津冀城市群的地理中心,位于京津两个国际都市之间。本文选取廊坊市中心为研究对象,利用高分一号卫星数据和航空影像,分析廊坊市2010~2016年的城市扩张变化情况,为京津冀协同发展制定政策并为城市制订规划提供依据。首先对遥感影像进行预处理,对高分一号卫星影像,按用地类型分别采用监督分类、面向对象和植被指数法提取城市2016年地表现状信息,并进行精度评价;对2010年的航空影像进行数字化,两类数据结合进行基于分类的变化检测和精度评价,分析城市空间变化特征。结果表明,厂房、建筑和未建成区分别采用监督分类、建筑阈值分类和面向对象法分类效果较好;廊坊市城市扩张的驱动力主要为经济发展、政策因素、历史条件、地形等。

Study of Urban Expansion Change Monitoring Based on GF-1

Langfang is the geographical centre of Beijing-Tianjin-Hebei urban agglomeration,Located in Beijing and Tianjin between the two international metropolis.This study selected the Langfang city center as the research object,through the GF-1 satellite data analysis can accurately grasp the law of Langfang urban expansion in 2010-2016,the analysis of urban expansion can set policy for the coordinated development of Beijing-Tianjin-Hebei,set policy for the coordinated development of Beijing-Tianjin-Hebei and provide a basis for urban planning.For the first,experimental processing remote sensing image.Then according to the land use types respectively using supervised classification,object-oriented and building threshold method to extract the city in 2016 the surface status information and accuracy evaluation for GF-1 satellite data;to digital aerial images in 2010,two classes of data based on the classification of change detection and precision evaluation,analysis of urban space characteristics.The results show that the factory building,construction and improper respectively using supervised classification,building threshold classification and method of object -oriented classification effect is better;Langfang city expansion main driving force for economic development,policy factors,historical conditions,terrain,etc.