摘要
耕地细碎化导致农业生产成本高、效率低,为了提高耕地利用效率,需实现耕地集中式管理。针对均匀网格在对耕地面积进行表达时数据量冗余和格网尺度选择问题,本文提出了根据斑块平均面积和面积表达误差确定格网最适宜起始和终止尺度的方法,构建基于四叉树的非均匀格网,建立了耕地集中连片分析规则、评价指标体系和技术流程,实现非均匀格网下的耕地集中连片等级划分。以江苏省徐州市为试验区开展耕地集中连片分析。结果表明:①与均匀网格相比,非均匀格网减少了43.8%数据冗余,实现了耕地面积最小误差表达,适用性更强。②徐州耕地连片区域占耕地总面积88.6%,其中50%耕地集中连片等级处于中等偏上水平。③连片区域中有21.4%耕地集中连片等级处于中等以下水平,应将其作为提高区域整体连片等级优先优化的耕地。
The fragmentation of arable land leads to high agricultural production cost and low efficiency.In order to improve the utilization efficiency of arable land,it is necessary to realize the centralized management of arable land.Aiming at the problem of data redundancy and grid scale selection when the uniform grid is used to express the arable land area,this paper proposes a method to determine the optimal starting and ending scales of the grid according to the average area of the patch and the area expression error,and constructs a non-uniform grid based on the quadtree.The analysis rules,evaluation index system and technical process of arable land centralized connection are established to realize the classification of arable land centralized connection under non-uniform grid.Taking Xuzhou city of Jiangsu province as the experimental area,the concentrated contiguous analysis of arable land is carried out.The results show that:①Compared with uniform grid,non-uniform grid reduces 43.8%data redundancy,realizes the minimum error expression of arable land area,and has stronger applicability.②The area of arable land in Xuzhou accounts for 88.6%of the total area of arable land,of which 50%of the arable land is concentrated in the upper middle level.③In the contiguous area,21.4%of the arable land is concentrated below the middle level,which should be used as the arable land to improve the overall level of the region.
作者
李博
赵荣
张玉
LI Bo;ZHAO Rong;ZHANG Yu(Liaoning Technical University,Fuxin 123032,China;Chinese Academy of Surveying and Mapping,Beijing 100039,China)
出处
《测绘通报》
CSCD
北大核心
2024年第2期124-128,共5页
Bulletin of Surveying and Mapping
基金
国家自然科学基金面上项目(71903183)
国家社会科学基金重大项目(18ZDA066)
中央公益科研院所基本业务费(AR2122
AR2207)。
关键词
耕地
集中连片
等级划分
非均匀格网
arable land
concentrated contiguous
grade division
non-uniform grid
