The Polar Geospatial Center: Community and Facility Support

摘要极地地理空间中心（PGC）是明尼苏达大学的一个极地科学和后勤支持组织。研究界发现自己正处于一场科学和地理空间革命之中，这是由前所未有的开放地理空间数据的可用性以及国家地理空间情报局（NGA）提供的高分辨率光学图像所引发的。支持国家科学基金会？PGC的极地科学使命是了解地球及其系统，探索地理前沿，并在极地环境中开展科学研究，PGC利用这些数据为研究人员和物流团队提供制图、地理信息系统和遥感解决方案。PGC提供的产品和服务包括：制图和GIS分析；获得南极和北极的亚米商业卫星图像；为NSF极地社区提供任务，管理，处理和交付高水平增值产品的专业知识；领域和制度知识，以解决广泛的地理空间问题；和教育课程，包括在线材料，以转移PGC？向社会贡献自己的知识和经验。PGC正在与国家地理空间情报局合作，根据高分辨率卫星图像创建一个公开可用的整个北极的高分辨率数字高程模型（DEM）。这些数据将被北极社区用于支持包括交通、国防、土地管理、可持续发展和科学研究在内的活动。极地地理空间中心（PGC）为极地社区提供地理空间资源和知识。PGC员工与每个用户都有直接的一对一关系，根据用户的专业知识和需求定制产品交付。特定的科学或物流目标。为此，PGC通过国家地理空间情报局（National Geospatial-Intelligence Agency）授权，维护着一个广泛的亚米级光电商业图像在线档案。s （NGA）增强视图程序。PGC致力于使用极限科学与发现环境（XSEDE）和Blue Waters高性能计算基础设施自动化劳动密集型处理工作流程，并正在开发基于网络的图像和地理空间产品交付系统（FRIDGE；联邦研究图像下载和地理数据勘探）。这个交付系统是基于一个任务管理和排队工具，它与PGC？s用户管理数据库和PGC？s高性能计算集群。极地数字高程模型（DEM）将使用基于tin的搜索空间最小化（SETSM）算法的表面提取和Ames立体管道生成。这些产品在没有地面控制的情况下，预期精度为4m，使用地面控制时，预期精度为亚米级。PGC使命的一个关键组成部分是培训当今年轻的地理空间学生使用图像来解决科学问题。PGC提供研讨会、在线教学材料和协作图像处理工作流开发。包括?S的目标是为促进极地科学提供快速和具有成本效益的地理空间数据和教育。

Title: The Polar Geospatial Center: Community and Facility SupportNon-Technical AbstractThe Polar Geospatial Center (PGC) is a polar science and logistics support organization at the University of Minnesota. The research community finds itself in the midst of a scientific and geospatial revolution sparked by the availability of an unprecedented volume of open geospatial data, as well as access to high-resolution optical imagery made available by the National Geospatial-Intelligence Agency (NGA). In support of NSF?s Polar science mission of understanding the earth and its systems, exploring the geographical frontier, and performing science enabled by in polar setting, PGC uses these data to provide mapping, GIS, and remote sensing solutions to researchers and logistics groups. PGC provides products and services including: mapping and GIS analysis; access to sub-meter commercial satellite imagery for the Antarctic and Arctic; expertise to task, manage, process and deliver high-level value-added products to the NSF polar community; domain and institutional knowledge to solve a broad range of geospatial problems; and educational courses including online material to transfer PGC?s knowledge and experience to the community. The PGC is collaborating with the National Geospatial-Intelligence Agency to create a publicly available high-resolution digital elevation model (DEM) of the entire Arctic from high-resolution satellite imagery. These data will be used by the Arctic community to support activities including transportation, national defense, land management, sustainable development, and scientific studies.Technical Abstract The Polar Geospatial Center (PGC) facilitates access to geospatial resources and knowledge for the polar community. PGC staff has a direct one-to-one relationship with each user, tailoring product delivery to the expertise and needs of the user?s specific science or logistics goals. To this end, PGC maintains an extensive online archive of sub-meter electro-optical commercial imagery licensed through the National Geospatial-Intelligence Agency?s (NGA) EnhancedView program. PGC works to automate labor-intensive processing workflows using the Extreme Science and Discovery Environment (XSEDE) and Blue Waters high performance computing infrastructures, and is developing a web-based imagery and geospatial product delivery system (FRIDGE; Federal Research Imagery Download and Geodata Exploration). This delivery system is based around a task management and queuing tool that interfaces with PGC?s user management database and PGC?s HPC cluster. Polar digital elevation models (DEM) will be produced using the Surface Extraction from TIN-based Search-space Minimization (SETSM) algorithm and the Ames Stereo Pipeline. These products have an expected accuracy of 4m without ground control and sub-meter accuracy when ground control is used. A key component of PGC's mission is training of today's young geospatial students in the use of imagery to solve scientific problems. PGC offers workshops, online instructional material, and collaborative imagery processing workflow development. PGC?s goal is to provide rapid and cost-effective access to geospatial data and education for the purpose of promoting polar science.