Interagency Agreement to Support The National Imagery and Mapping Agency University Research Initiatives - NURI Activities

支持国家影像与测绘机构大学研究计划的机构间协议 - NURI 活动

• 批准号: 0003930
• 负责人: Richard Berg
• 金额: $ 25.5万
• 依托单位: National Imagery and Mapping Agency
• 依托单位国家: 美国
• 项目类别: Interagency Agreement
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-15 至 2003-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0003930&HistoricalAwards=false
• 关键词: Interagency; Agreement; Support; National; Imagery

This action provides funds to be transferred from the National Science Foundation (NSF) to the National Imagery and Mapping Agency (NIMA). These funds will be used by NIMA to help support a project on Spatio-Temportal Panning and Zooming that has been selected through a NIMA-administered competitive evaluation process as part of the NIMA University Research Initiative (NURI) program. The project will be conducted by Kathleen Hornsby and colleagues at the University of Maine.Spatio-temporal knowledge representation often requires changing from one level of detail to another so that users can carry out a desired task. Although abstraction, or the opposite task of shifting to more detailed views, are routinely and intuitively carried out by humans, formalizing these shifts for integration into information system query languages offers many challenges. Current geographic information systems (GIS), for example, allow for zooms based on geometric properties only. Similarly, GIS users can change only their perspective of data by panning. This project goes beyond graphic zooming or panning by considering another important perspective - time. This project will develop a formal model to support changes in levels of temporal detail. Using the identity-based approach, a set of temporal pan and zoom operators will be introduced. These operators will be embedded into a spatial query language and ultimately integrated with the spatial pan and zoom operators to become a set of spatio-temporal operations. The project will also examine the utility and mathematical properties of using lattices as an underlying structure for organizing views of objects at different levels of temporal detail. Temporal panning and zooming result in either simpler views that are easier to understand or more detailed views that uncover information that is otherwise unknown. The research will advance the theory on temporal abstractions, which is important for users of very large geospatial databases. The findings will be of particular relevance to information management of massive databases, and will be applicable to a variety of phenomena that involves time such as meteorological occurrences and population movements.

这项行动提供资金从国家科学基金会（NSF）转移到国家图像和测绘局（NIMA）。这些资金将被NIMA用于支持一个时空平移和缩放项目，该项目已通过NIMA管理的竞争性评估过程被选中，作为NIMA大学研究计划（NURI）计划的一部分。该项目将由缅因州大学的凯瑟琳·霍恩斯比及其同事负责。时空知识表示通常需要从一个细节级别转换到另一个细节级别，以便用户能够执行所需的任务。尽管抽象，或转换为更详细视图的相反任务，通常由人类直观地执行，但是将这些转换形式化以集成到信息系统查询语言中提供了许多挑战。例如，当前的地理信息系统（GIS）只允许基于几何属性的缩放。类似地，GIS用户只能通过平移来改变他们的数据视角。这个项目超越了图形缩放或平移，考虑了另一个重要的角度-时间。这个项目将开发一个正式的模型来支持时间细节级别的变化。使用基于身份的方法，将引入一组时间平移和缩放算子。这些操作符将被嵌入到空间查询语言中，并最终与空间平移和缩放操作符集成，成为一组时空操作。该项目还将研究使用网格作为组织不同时间细节层次的对象视图的底层结构的效用和数学特性。时间平移和缩放可以产生更简单的视图（更容易理解），也可以产生更详细的视图（揭示未知的信息）。该研究将推动时间抽象理论的发展，这对超大规模地理空间数据库的用户具有重要意义。研究结果将特别与大型数据库的信息管理有关，并将适用于涉及时间的各种现象，例如气象事件和人口流动。