title: Demarcation of Prime Farmland Protection Areas around a Metropolis Based on High-Resolution Satellite Imagery.
abstract: Prime farmland (PF) is defined as high-quality farmland and a prime farmland protection area (PFPA, including related roads, waters and facilities) is a region designated for the special protection of PF. However, rapid urbanization in China has led to a tremendous farmland loss and to the degradation of farmland quality. Based on remote sensing and geographic information system technology, this study developed a semiautomatic procedure for designating PFPAs using high-resolution satellite imagery (HRSI), which involved object-based image analysis, farmland composite evaluation, and spatial analysis. It was found that the HRSIs can provide elaborate land-use information, and the PFPA demarcation showed strong correlation with the farmland area and patch distance. For the benefit of spatial planning and management, different demarcation rules should be applied for suburban and exurban areas around a metropolis. Finally, the overall accuracy of HRSI classification was about 80% for the study area, and high-quality farmlands from evaluation results were selected as PFs. About 95% of the PFs were demarcated within the PFPAs. The results of this study will be useful for PFPA planning and the methods outlined could help in the automatic designation of PFPAs from the perspective of the spatial science.
authors.affiliation: Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing, 210093, China.|Department of Geographic Information Science, Nanjing University, Nanjing 210093, China.
authors.forename: Nan
authors.initials: N
authors.lastname: Xia
authors.affiliation: Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing, 210093, China.|Department of Geographic Information Science, Nanjing University, Nanjing 210093, China.
authors.forename: YaJun
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing, 210093, China.|Department of Geographic Information Science, Nanjing University, Nanjing 210093, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Xu
authors.affiliation: Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing, 210093, China.|Department of Geographic Information Science, Nanjing University, Nanjing 210093, China.
authors.forename: YueFan
authors.initials: Y
authors.lastname: Sun
authors.affiliation: Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing, 210093, China.|Department of Geographic Information Science, Nanjing University, Nanjing 210093, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Yuan
authors.affiliation: Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing, 210093, China.|Department of Geographic Information Science, Nanjing University, Nanjing 210093, China.|Collaborative Innovation Center for the South Sea Studies, Nanjing University, Nanjing 210093, China.|Collaborative Innovation Center of Novel Software Technology and Industrialization, Nanjing University, Nanjing, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Cheng
authors.affiliation: Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing, 210093, China.|Department of Geographic Information Science, Nanjing University, Nanjing 210093, China.
authors.forename: PengHui
authors.initials: P
authors.lastname: Jiang
authors.affiliation: Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing, 210093, China.|Department of Geographic Information Science, Nanjing University, Nanjing 210093, China.|Collaborative Innovation Center for the South Sea Studies, Nanjing University, Nanjing 210093, China.|Collaborative Innovation Center of Novel Software Technology and Industrialization, Nanjing University, Nanjing, China.
authors.forename: ManChun
authors.initials: M
authors.lastname: Li