关键词: 空间可达性, 绿地, GIS, 永定城区

Abstract: Based on the land use patches in Yongding district of Zhangjiajie city, using the principle of spatial accessibility of geographic information system（GIS） technology, the cost-weighted distance method is used to assign resistance values to various types of land patches in Yongding district, and the spatial accessibility analysis of green space status is carried out to generate spatial accessibility map of Yongding urban green space. The results show that the green space system of Yongding district in Zhangjiajie city is relatively perfect, and the space accessibility of green space is good, but there are certain differences between the areas. The green space accessibility of the city center is better than that of the eastern part of the city. The optimization strategy of green space layout in Yongding district of Zhangjiajie city were put forward to provide a certain reference for urban planning and construction.

Key words: spatial accessibility, green space, GIS, Yongding district