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相关概念视频

Selected Data About Geographic Locations01:25

Selected Data About Geographic Locations

27
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...
27
Levels of Use of a GIS01:29

Levels of Use of a GIS

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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...
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GIS Software, Hardware, and Sources of GIS Data01:23

GIS Software, Hardware, and Sources of GIS Data

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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...
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Coordinates and Map Projections01:29

Coordinates and Map Projections

43
Coordinates and map projections are essential tools in accurately representing the Earth's surface for various applications, ranging from navigation to spatial analysis. The latitude and longitude coordinate system is a universally recognized framework for defining locations. Latitude specifies the distance of a point north or south of the equator, measured in degrees from 0° at the equator to 90° at the poles. Longitude indicates a location's position east or west of the prime meridian,...
43
Introduction to GIS01:28

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Geographic Information Systems (GIS) are tools for storing, analyzing, and displaying spatial data alongside related attributes. Unlike traditional information systems that address general queries, GIS incorporates spatial components, enabling users to answer "where" and "how far." For example, GIS can process housing data linked to geographic locations like zip codes, allowing insights into population density or housing distribution through thematic maps.GIS integrates technologies such as...
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Methods of Obtaining Topography01:25

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Topography involves measuring and mapping land elevations, natural features, and artificial structures to create accurate representations of the terrain. Topographic surveying relies on traditional and modern methods, each with distinct advantages and limitations.Traditional Surveying Methods:Transit stadia surveys and plane table surveys were widely used traditional surveying methods. These techniques relied on instruments like theodolites and stadia rods for measuring distances and angles,...
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优化了1990年,2000年和2010年美国人口普查微数据的空间信息.

Christopher S Fowler1, James D Gaboardi2, Jonathan P Schroeder3

  • 1Department of Geography, Penn State University, State College, USA. csfowler@psu.edu.

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概括
此摘要是机器生成的。

我们提高了1990年,2000年和2010年美国十年人口普查数据的空间准确性. 优化空间人口普查信息跨时间链接 (OSCILAT) 数据集使得精确的小区域变化分析成为可能.

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科学领域:

  • 人口统计学 人口统计学
  • 地理信息科学 地理信息科学
  • 统计数据管理 统计数据管理

背景情况:

  • 美国历史上的十年人口普查数据缺乏精确的空间准确性.
  • 在最近的改进之前,人口普查答复中的空间信息是有限的.
  • 随着时间的推移,分析小地理区域带来了重大数据挑战.

研究的目的:

  • 升级1990年,2000年和2010年美国十年人口普查响应的位置精度.
  • 创建一个链接的数据集 (OSCILAT),以改善空间和纵向分析.
  • 为了实现对任意空间单位的人口普查数据的准确表格化.

主要方法:

  • 开发和应用方法来提高历史人口普查响应数据的空间准确性.
  • 将1990年,2000年和2010年人口普查数据整合到一个统一的,空间改进的数据集中.
  • 在受限制的联邦统计研究数据中心 (FSRDC) 数据仓库中存储了跨时间链接的优化空间人口普查信息 (OSCILAT).

主要成果:

  • 在1990年,2000年和2010年美国十年人口普查中,成功升级了所有响应的位置精度.
  • 欧西拉特数据集显著提高了旧人口普查数据的空间准确性和完整性.
  • 实现精确的空间和纵向分析,包括在2020年区块边界内的表格.

结论:

  • 欧西拉特数据集为更准确的历史人口统计研究提供了基础.
  • 增强的空间数据有助于精确测量小地理区域随时间的变化.
  • 通过FSRDC系统访问OSCILAT,支持详细分析美国人口动态.