Collaborative Research: THREDDS Second Generation

THREDDS项目的中心任务是使教育工作者和研究人员能够在广泛的教育环境中发布、定位、分析和可视化。在最初阶段，THREDDS建立了一个可靠的服务和工具的工作原型，使数据提供者能够在其网站上创建数据持有的清单目录，并使教育模块构建者能够编写带有指向环境数据集和分析工具的嵌入指针的复合文件。然后，可以使用标准协议将这些目录和数据交互文件收集到数字图书馆中。THREDDS第二代(THREDDS2G)正在利用最近的技术进步，扩大贡献者团队和集合中数据的广度，并将THREDDS技术与新兴标准和相关环境数据系统相结合。此外，它正在积极参与新的学科和纳入新的工具，使最终产品在所有教育级别、决策者和普通公众中更加有用。THREDDS2G极大地增强和扩展了现有项目，因为它在几个领域开辟了全新的天地。主要目标分为以下几类：1.互动教育模块：与教育内容建造者和数据提供者社区合作，创建教育模块，纳入寻找环境数据集并与之互动的设施。改进的元数据目录：使用在初始阶段实施的工具和清单目录，开发具有显著改进的元数据的额外目录，以简化寻找和使用科学数据的过程，为改进的元数据制定标准和工具，纳入科学本体论，并实施科学数据模型。与地理信息系统(地理信息系统)的互操作性：使用地理信息系统和传统的THREDDS客户端创建具有连贯连接和访问地理信息系统数据的可互操作的数据系统。数据集搜索和发现以及其他Web服务：与NSDL和DLESE合作，确保THREDDS系统朝着与Web服务中新兴标准兼容的方向发展。面向教育的、基于标准的客户端软件：将名为MyWorld的面向教育的地理信息系统客户端分析和显示应用程序集成到THREDDS数据服务中。虽然THREDDS是一个高度协作的项目，但Unidata程序中心领导和协调开发、传播软件并支持THREDDS社区。随着包括K-12教育技术、水文学、固体地球研究、社会影响和地理信息系统领域的领先组织在内的强有力的新伙伴关系的建立，THREDDS2G的影响将远远超出Unidata的广大受众。认识到该项目对开发获取、编目和分析环境数据集内容的软件工具的重要性，国家科学基金会地球科学司正在为该项目提供大量共同资金。

The central mission of the THREDDS project is to make it possible for educators and researchers to publish, locate, analyze, and visualize in a wide variety of educational settings. In the initial phase THREDDS established a solid, working prototype of services and tools to enable data providers to create inventory catalogs of the data holdings at their site and educational module builders to author compound documents with embedded pointers to environmental datasets and analysis tools. These catalogs and data-interactivedocuments can then be harvested into digital libraries using standard protocols. THREDDS Second Generation (THREDDS2G) is expanding the team of contributors and the breadth of data in the collections, taking advantage of recent technological advancements, and integrating THREDDS technologies with emerging standards and related environmental data systems. In addition it is actively engaging new disciplines and incorporating new tools that are making the end products more useful at all educational levels, for decision makers and for the general public. THREDDS2G significantly augments and expands the existing project as it breaks entirely new ground in several areas. The main objectives fall into the following categories:1. Interactive Educational Modules: work with the community of educational content builders and data providers to create educational modules that incorporate facilities for finding and interacting with environmental datasets.2. Enhanced Metadata Catalogs: Using tools and inventory catalogs implemented in the initial phase, develop additional catalogs with significantly enhanced metadata to simplify the process of finding and using scientific data, developing standards and tools for enhanced metadata, incorporating scientific ontologies, and implementing scientific data models.3. Interoperability with Geographic Information Systems (GIS): Create interoperable data systems with coherent connectivity and access to GIS data using GIS and traditional THREDDS clients.4. Dataset Search and Discovery and Other Web Services: Working collaboratively with NSDL and DLESE, ensure that THREDDS systems evolve toward compatibility with emerging standards in Web services.5. Education-oriented, Standards-based Client Software: Integrate an education-oriented GIS client analysis and display application called MyWorld to THREDDS data services.While THREDDS is a highly collaborative project, the Unidata Program Center is leading and coordinating the development, disseminating the software, and supporting the THREDDS community. With strong new partnerships that include leading organizations in K-12 educational technology, hydrology, solid Earth studies, societal impacts, and GIS, the impact of THREDDS2G will extend well beyond even the vast Unidata audience. Significant co-funding of this project is being provided by the Division of Earth Sciences in the NSF Directorate for Geosciences in recognition of the importance that this project has on the development of software tools for accessing, cataloging and analyzing content of environmental datasets.