Abstract: Land use plays an important role in the unified management of natural resources. In the face of data from different regions and years, it is particularly important to analyze and compare the caliber uniformly, and at the same time to reflect the differences between them. In this paper, the data of land use status of Yixing city in 2009 and 2017 are used as data sources. Using land classification criteria to extract three types of land use, and attempts to analysis through cell division of different sizes, find the suitable size for this data. Then the classification range is demarcated based on the natural breaks (jenks) Classification method, to comprehensive analysis on the distribution and change trend of three types of land use in Yixing city, it truly reflects the land use situation of Yixing city. By selecting appropriate spatial scale and classification range delimitation method, this paper constructs an operational and scientific land use data grid method, which provides basis for the overall management and comprehensive management of natural resources departments.

Key words: land use, natural resources, spatial scale, data grid, classification scope delimitation