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。
In order to objectively monitor and evaluate the effectiveness of land consolidation,a new method to identify filed patch data was proposed,which was based on remote sensing imagery and taking arable land polygon data as constraints. The field patch data identified by using this method not only had regional characteristics, but also considered ownership information to some extent. On this basis,evaluation index system in field and regional levels was respectively built for cultivated field patch fragmentation＇s degree. Patch area,regularity,compactness and connectivity were chosen as evaluation indexes in field level and mean area,density of field patch,LAI,LSI and PAFRAC were chosen as evaluation indexes in regional level. And then the indexes in two levels were made to be dimensionless respectively. The method was applied to Guangxi hilly areas and Hainan plains. The results of experiment showed that after consolidation,the majority of comprehensive evaluation index in field level of Guangxi region was improved from 50 ~ 70 to 70 ~ 90,and that in Hainan plains was improved from 70 ~ 90 to90 ~ 100. The comprehensive evaluation index in regional level of Guangxi hilly areas was increased from41 to 83 after land consolidation,and that in Hainan plains was increased from 63 to 92. The proposed method for identifying field patch can support the monitor and evaluation of land consolidation projection aimed at land fragmentation,no matter study areas located in hilly areas or plain areas. Hence,the research result can provide support for remote sensing monitor and evaluation in land consolidation areas and remote sensing discerning of well-facilitated farmland.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2017年第1期104-111,共8页
Transactions of the Chinese Society for Agricultural Machinery
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)
关键词
遥感
土地整治
面向对象分类
田块形态
监测
评价
remote sensing
land consolidation
object-oriented classification
patch morphology
monitor
evaluation
