Multiresolution representation of hexagon grids for digital earth

数字地球六边形网格的多分辨率表示

• 批准号: 412728-2011
• 负责人: Samavati, Faramarz
• 金额: $ 3.75万
• 依托单位: University of Calgary
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=530712
• 关键词: Multiresolution; representation; hexagon; grids; digital

The project targets multiresolution representation of an hexagonal lattice within a Digital Earth framework. Vast amounts of geospatial data are being gathered in large volumes constantly, at different scales and from different sources, resulting in the need for a Digital Earth framework. Conventional mechanisms of this process are slow and do not harness all the benefits of existing dynamic spatial data capturing technologies. In addition, since the integration and analysis usually require special expertise and access to limited and exclusive resources, the on-demand sharing, distribution and analysis of such dynamic spatial information has been a challenge. Therefore, it is necessary to have an efficient data structure that also supports multiresolution. As a representation of the Earth, the Digital Earth framework must reduce possible distortions - such as areal and angular - that may arise between the planar data and the non-planar surface of the earth. The most common form of spatial data representation is graphical. Naturally, this leads us to consider graphical visualization as one of the important aspect of any Digital Earth framework. Since the current widespread graphical techniques are based on quadrilaterals and triangles, using an hexagonal lattice creates challenges in the graphical representation of features and the smooth transitions between resolutions. In this project, we focus on scientific issues and research problems in three subareas: Equal Area Projection, Indexing, and Data Structures and Visualization in the Digital Earth framework. Our research plan considers methods for improving current solutions and also investigating new approaches for resolving these problems.

该项目的目标是数字地球框架内六角晶格的多分辨率表示。不同规模、不同来源的大量地理空间数据不断被收集，因此需要数字地球框架。此过程的传统机制速度缓慢，并且无法利用现有动态空间数据捕获技术的所有优势。此外，由于整合和分析通常需要特殊的专业知识和有限且专有的资源，因此这种动态空间信息的按需共享、分发和分析一直是一个挑战。因此，有必要拥有一个同时支持多分辨率的高效数据结构。作为地球的表示，数字地球框架必须减少平面数据和地球非平面表面之间可能出现的扭曲，例如面积和角度。空间数据表示的最常见形式是图形。自然地，这使我们将图形可视化视为任何数字地球框架的重要方面之一。由于当前广泛使用的图形技术基于四边形和三角形，因此使用六角形点阵给特征的图形表示和分辨率之间的平滑过渡带来了挑战。在这个项目中，我们重点关注三个子领域的科学问题和研究问题：等面积投影、索引以及数字地球框架中的数据结构和可视化。 我们的研究计划考虑改进当前解决方案的方法，并研究解决这些问题的新方法。