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相关概念视频

Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device01:30

Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device

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Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point...
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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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Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

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GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
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Applications of GIS: Disaster Management and Emergency Response01:29

Applications of GIS: Disaster Management and Emergency Response

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Geographic Information System (GIS) technology is essential for risk identification, action prioritization, and resource optimization in critical situations like flooding and earthquakes. By integrating spatial and demographic data, GIS provides a comprehensive framework for emergency response.GIS integrates data layers, like rainfall intensity, topography, elevation profiles, and river levels, to model high-risk flood zones. These layers assess areas susceptible to flooding based on their...
106
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

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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...
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Manipulation and Analysis01:21

Manipulation and Analysis

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GIS manipulation and analysis functions are vital for decision-making and planning. These activities range from data retrieval tasks, such as selecting information based on specific criteria, to advanced analytical techniques that address complex spatial problems.One critical GIS analysis method is overlaying, which combines multiple data layers to examine impacts. For example, overlaying a river-dammed lake boundary with road networks can identify affected infrastructure. Another common...
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数字曝光通知工具:全球景观分析

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  • 1Herbert Wertheim School of Public Health and Human Longevity Science, University of California, San Diego, California, United States of America.

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在全球范围内发现了200多个COVID-19移动应用程序,其中128个支持暴露通知. 这些数字工具为疫情期间的公共卫生干预提供了新的解决方案.

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科学领域:

  • 公共卫生 公共卫生
  • 数字健康数字健康
  • 流行病学 流行病学

背景情况:

  • 随着COVID-19的流行,公共卫生领域的数字化工具的发展得到了推动.
  • 暴露通知系统和移动应用程序对于接触者追踪和预防至关重要.
  • 全球范围内出现了广泛的COVID-19特定的移动应用程序.

研究的目的:

  • 描述与流行病相关的移动应用的全球格局.
  • 识别和分类数字曝光通知和联系人追踪工具.
  • 审查全球COVID-19移动应用程序的多样性.

主要方法:

  • 使用特定国家COVID应用程序查询搜索谷歌.
  • 访问App Store,Google Play和政府网站进行数据收集.
  • 分类和总结COVID-19暴露通知系统 (ENS) 和非ENS产品.

主要成果:

  • 在127个国家/地区识别了224个COVID-19移动应用程序.
  • 128个应用支持暴露通知,其中75个使用谷歌果暴露通知 (GAEN) API.
  • 非ENS应用程序专注于自我评估 (35.4%),统计/信息 (32.3%) 和健康建议 (29.2%).

结论:

  • 对COVID-19的数字反应产生了多样化和创新的公共卫生解决方案.
  • 需要进一步的研究来评估这些数字工具在减少病毒传播方面的有效性.
  • 新型移动应用在非药物公共卫生干预中发挥了重要作用.