一个高分辨率的全球年度城市和城镇边界数据集 (2000-2022年) 来自GLC_FCS30D产品
Ming Bai1,2, Xiao Zhang3,4, Weitao Ai1,2
1College of Geomatics, Xi'an University of Science and Technology, Xi'an, 710054, China.
Scientific data
|December 4, 2025
概括
本研究介绍了全球城市和城镇边界 (GCTB) 数据集,使用不透水表面和人口数据绘制城市范围. 全球城市化指标数据集准确地区分了城市和小镇,有助于全球城市化研究.
科学领域:
- 地理信息科学 地理信息科学
- 遥感 遥感 遥感 遥感
- 城市研究 城市研究
背景情况:
- 城市边界对于理解人类定居点动态至关重要.
- 现有的数据集很难区分低密度地区,并纳入人口分布.
- 准确的城市范围测绘对于可持续发展规划至关重要.
研究的目的:
- 开发一种用于绘制年度全球城市和城镇边界的新方法.
- 创建30米分辨率的全球城市和城镇边界 (GCTB) 数据集.
- 通过整合不透水表面和人口数据来提高城市范围划分的准确性.
主要方法:
- 开发了一种双值方法,整合了不透的表面密度和人口数据.
- 利用核心密度估计和蜂自动机用于全球城市边界生成.
- 使用人口门区分城市和乡镇,创建GCTB数据集 (2000-2022).
主要成果:
- 在GCTB数据集显示强烈一致与城市扩张图谱数据集 (R2 > 0.88).
- 城市/城镇分类使用OpenStreetMap数据实现了高精度 (0.80为城市,0.65为城镇).
- 该数据集为2000-2022年提供了准确的30米分辨率的年度城市边界.
结论:
- 全球城市边界测试数据集为绘制全球城市边界的地图提供了重大进展.
- 它为全球城市化和可持续发展规划提供了必要的空间信息.
- 无透面积和人口数据的整合提高了城市范围划分的准确性.
相关概念视频
01:25Selected Data About Geographic Locations
246
Geographic Information Systems (GIS) rely on two core types of data: spatial data and attribute data.Spatial DataSpatial data defines the physical location of features within a coordinate system, typically expressed in terms of latitude and longitude. It provides precise positioning for elements like roads, rivers, or buildings.Attribute DataAttribute data complements spatial data by adding descriptive information about these features. For example, a road's spatial data includes its start and...
246
01:23GIS Software, Hardware, and Sources of GIS Data
691
A Geographic Information System (GIS) combines specialized software and hardware to effectively manage, analyze, and present spatial and related data. GIS software includes critical functionalities such as a user interface for easy navigation, database management tools for handling spatial and attribute data, and data retrieval features for efficient access. Analytical tools transform raw data into insights, while display functions produce maps and reports in various formats for effective...
691
01:30Thematic Layering in GIS
304
In the past, planning projects such as schools or public facilities required extensive manual effort to gather and compile data. Information such as property boundaries, soil characteristics, road networks, zoning regulations, and flood zones had to be sourced individually from courthouses, utility providers, and registry offices. Assembling these datasets into a coherent format often took several months, delaying project timelines.The introduction of Geographic Information Systems (GIS)...
304
01:29Levels of Use of a GIS
323
Geographic Information Systems (GIS) operate across three levels of application, each representing an increasing degree of complexity: data management, analysis, and prediction. These levels reflect the expanding functionality and versatility of GIS technology in handling spatial data for diverse purposes.Data ManagementAt its foundational level, GIS serves as a tool for data management, enabling the input, storage, retrieval, and organization of spatial data. This level is often employed in...
323
01:17Design Example: Alignment of a Road Line Using GIS
315
The alignment of a road line using Geographic Information Systems (GIS) is a critical process in civil engineering, combining advanced technology with practical decision-making. This methodology begins with the collection of geospatial data, including information on land cover, geomorphology, drainage patterns, slope, and contour details. Such data is typically acquired through satellite imagery and GIS tools, offering a comprehensive understanding of the terrain.Once the data is gathered, it...
315
01:28Field Application of Global Positioning System
293
The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
293