基于自然间断点分级法的土地利用数据网格化分析

土地利用在自然资源统一管理中扮演着重要角色，面对不同区域和年份的数据，统一分析比对口径尤为重要，同时也应反映出相互之间的差异。本文以宜兴市2009年和2017年土地利用现状数据为数据源，首先使用统一的分类标准提取用地类型中的3大类，通过不同大小的单元划分尝试和结果分析，发现适用于该数据的网格尺度大小；然后基于自然间断点分级法进行分级范围划定，对宜兴市三类用地类型的分布和变化趋势进行综合分析，较为真实地反映了宜兴市用地情况；最后通过选用合适的空间尺度和分级范围划定方法，进而构建一个兼具操作性和科学性的土地利用数据网格化方法，为自然资源部门统筹管理和综合治理提供依据。

Grid analysis of land use based on natural breaks (jenks) classification

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.