土地整治区田块空间形态变化遥感监测与评价

发布时间：2019-01-01 17:28

【摘要】：为了客观监测和评价土地整治项目建设成效,基于高空间分辨率遥感影像,以耕地图斑数据为约束,利用面向对象分类方法识别田块,并构建田块级和区域级田块空间形态评价指标体系,选取田块面积、规整度、紧致性和连片性等4个指标为田块层级评价指标,选取田块密度、平均田块面积、最大田块指数、景观形状指数和周长面积分维数等5个指标为区域层级评价指标,并分别对两个层级指标进行去量纲处理,构建综合指标。分别以广西丘陵区和海南平原区的土地整治区作为试验区,试验结果表明:广西研究区整治前田块层级耕地空间形态综合指标分布在50~70,整治后提升到70~90,海南研究区整治前在70~90,整治后提升到90~100;广西研究区整治前区域层级田块空间形态综合指标值为41,整治后提升到83;海南研究区整治前为63,整治后提升到92。表征经过土地整治,两个研究区的田块形态均得到了较大提升。研究提出的土地整治项目建设成效遥感监测和评价方法,可以为我国土地整治和高标准农田建设的监测和评价提供技术支撑。
[Abstract]:In order to objectively monitor and evaluate the construction effect of land regulation project, based on high spatial resolution remote sensing image, the field block is identified by object oriented classification method, which is constrained by cultivated land map spot data. And the evaluation index system of field block spatial form is constructed. Four indexes, namely, field area, regularity, compactness and continuity, are selected as the evaluation index of field block level, and the field density, average field area and maximum field block index are selected. Five indexes, such as landscape shape index and circumference area fractal dimension, are regional level evaluation indexes, and the two hierarchical indexes are dimensionally removed to construct comprehensive indexes. Taking the land regulation areas of Guangxi hilly region and Hainan plain area as experimental areas, the experimental results show that the spatial comprehensive index of cultivated land at the field level before the renovation in Guangxi research area is distributed at 50 ~ 70, and then increased to 70 ~ (90). In Hainan research area, it was increased from 70 to 90 before renovation, and to 90 ~ 100 after renovation. The comprehensive index value of spatial morphology of the field blocks at the regional level was 41 before the renovation in Guangxi research area, and 83 after the renovation, and was increased to 92. 2 after the renovation in Hainan research area and 63 before the renovation of the research area in Hainan. As a result of land regulation, the field morphology of the two study areas has been greatly improved. The method of remote sensing monitoring and evaluation of the construction effect of land regulation project can provide technical support for the monitoring and evaluation of land regulation and high standard farmland construction in China.
【作者单位】：中国农业大学信息与电气工程学院;国土资源部农用地质量与监控重点实验室;
【基金】：国家高技术研究发展计划(863计划)项目(2013AA10230103) 国土资源部公益性行业科研专项(201511010-06)
【分类号】：S127;S28

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