Research on Grid Size Suitability of Gridded Population Distribution in Urban Area: A Case Study in Urban Area of Xuanzhou District, China.
Research on Grid Size Suitability of Gridded Population Distribution in Urban Area: A Case Study in Urban Area of Xuanzhou District, China.
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关于网格大小在城市地区的网格大小适用性的研究：中国徐纽地区市区的一个案例研究。
DOI：
10.1371/journal.pone.0170830
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发表时间：
2017
期刊：
影响因子：
3.7
通讯作者：
Xu F
中科院分区：
文献类型：
--
作者：
Dong N;Yang X;Cai H;Xu F
网格大小适宜性的研究对于提高网格化人口分布的精度具有重要意义。它有助于揭示人口的实际空间分布。然而，目前在这方面的研究还很少。许多建模良好的网格人口数据集基本上都是建立在单一网格尺度上的。如果网格单元大小不合适，将导致空间信息丢失或数据冗余。因此，为了捕获目标区域内所需的人口空间变化，有必要进行网格尺寸适宜性研究。本文总结了三个表达层次，即位置表达层次、数字信息表达层次和空间关系表达层次来分析网格大小的适宜性。本研究阐述了选择五个指标来探讨表达适宜性的原因。这五个指标分别是一致性测度、形状指数率、种群密度标准差、斑块多样性指数和平均局部方差。通过构建网格尺寸指标值曲线和合适的网格尺寸方案确定合适的网格尺寸。结果表明，在10m网格尺度上，三个表达层次都是令人满意的。网格尺寸为10m的人口分布栅格数据提供了极好的精度而不丢失。在我们的研究区域内，建议采用10米的网格尺寸作为生成高质量网格化人口分布的合适尺度。初步研究表明，五项指标相互协调，合理有效地评价了网格大小适宜性。并建议从表达水平的三个角度选择这五个指标，开展网格化人口分布的网格大小适宜性研究。
The research on the grid size suitability is important to provide improvement in accuracies of gridded population distribution. It contributes to reveal the actual spatial distribution of population. However, currently little research has been done in this area. Many well-modeled gridded population dataset are basically built at a single grid scale. If the grid cell size is not appropriate, it will result in spatial information loss or data redundancy. Therefore, in order to capture the desired spatial variation of population within the area of interest, it is necessary to conduct research on grid size suitability. This study summarized three expressed levels to analyze grid size suitability, which include location expressed level, numeric information expressed level, and spatial relationship expressed level. This study elaborated the reasons for choosing the five indexes to explore expression suitability. These five indexes are consistency measure, shape index rate, standard deviation of population density, patches diversity index, and the average local variance. The suitable grid size was determined by constructing grid size-indicator value curves and suitable grid size scheme. Results revealed that the three expressed levels on 10m grid scale are satisfying. And the population distribution raster data with 10m grid size provide excellent accuracy without loss. The 10m grid size is recommended as the appropriate scale for generating a high-quality gridded population distribution in our study area. Based on this preliminary study, it indicates the five indexes are coordinated with each other and reasonable and effective to assess grid size suitability. We also suggest choosing these five indexes in three perspectives of expressed level to carry out the research on grid size suitability of gridded population distribution.