Facility Support: OpenTopography - A National Hub for High Resolution Topographic Data, Tools, and Knowledge

0930643 Arrowsmith亚利桑那州立大学和圣地亚哥超级计算机中心（PI：巴鲁/ESTA-0930731）的这项合作赠款将支持一个为期三年的设施项目，以进一步开发和扩大开放地形门户网站（http：www.opentopography.org），通过互联网访问大量高分辨率机载和地基激光雷达地形数据集并生成衍生数据产品。 概念验证OpenTopography Portal（OpenTopo）是由美国国家科学基金会/信息技术研究和地球物理学/地理信息学支持圣地亚哥超级计算机中心开发的，作为GEON项目的一部分。 该门户网站目前托管和分发通过美国国家科学基金会/美国宇航局支持的佛罗里达大学国家机载激光条带测绘中心以及美国地质勘探局和美国宇航局资助的研究获得的数量有限的数据集。 这种支持将使大量的现存和未来的激光雷达数据的显着升级和同化：1）提供基于互联网的访问激光雷达地形数据的多种格式，包括？生的？点云数据、标准LIDAR衍生DEM和易于访问的Google Earth产品;以及2）与现有LIDAR地形数据提供商和主机（例如， NCALM、USGS、区域财团、州等）链接到他们的数据档案和/或通过一个可自由访问的网络接口托管和分发他们的数据和处理软件算法。 从激光雷达（光距离和测距）方法（机载和地基）获得的高分辨率数字高程模型对于地球科学，环境和工程应用具有革命性意义。这些数据是研究裸露地球表面、植被和土木结构的最有力的工具之一。 机载LIDAR（或机载激光条带测绘- ALSM）能够生成比目前从数字化USGS地形图或航天飞机雷达地形使命产品获得的数字高程模型（DEM）分辨率高一个数量级以上的DEM，从而能够以相对较低的费用在大面积上获得米级分辨率、分米精度的高程数据集。 地面或陆地激光扫描仪（TLS）为特定目标提供更精细的分辨率测绘。 这些数据使得能够在精细尺度和程度上研究表面过程，这在以前是不可能的，但对于理解过程是必不可少的（例如，侵蚀，山坡蠕变）在他们的运作规模。 OpenTopo将通过一个可免费访问的门户网站解决最终用户随时访问大量激光雷达数据集和产品的挑战。

0930643ArrowsmithThis collaborative grant to the Arizona State University and San Diego Supercomputer Center (PI: Baru/EAR-0930731) will support a three year Facility project to further develop and scale up the OpenTopography Portal (http://www.opentopography.org) for provision of high-performance, internet-based access to large volumes of high-resolution airborne and ground-based LIDAR topographic data sets and generation of derived data products. The proof-of-concept OpenTopography Portal (OpenTopo) was developed through NSF/Information Technology Research and EAR/Geoinformatics support to the San Diego Supercomputer Center as part of the GEON Project. That portal currently hosts and distributes a limited number of data sets acquired through the NSF/EAR supported National Center for Airborne Laser Swath Mapping (NCALM) at the University of Florida and from USGS and NASA-funded research. This support will enable significant upgrades and assimilation of large volumes of extant and future LIDAR data through: 1) provision of internet-based access to LIDAR topography data in multiple formats, including ?raw? point cloud data, standard LIDAR-derived DEMs, and easily accessible Google Earth products; and 2) development of additional collaborations with existing LIDAR topography data providers and hosts (e.g., NCALM, USGS, regional consortia, states, etc.) to link to their data archives and/or to host and distribute their data and processing software algorithms through a freely accessible web-interface. High-resolution digital elevation models derived from LIDAR (Light Distance And Ranging) methods (both airborne and ground-based) have been revolutionary for Earth science, environmental, and engineering applications. These data are among the most powerful tools available for study of the bare Earth surface, vegetative cover, and civil structures. Capable of generating digital elevation models (DEMs) more than an order of magnitude better resolved than those currently available from digitized USGS topo maps or from Shuttle Radar Topography Mission products, airborne LIDAR (or airborne laser swath mapping - ALSM) provides the ability to acquire meter-scale resolution, decimeter accuracy elevation data sets over large areas at relatively low expense. Ground-based or terrestrial laser scanners (TLS) offers even finer resolution mapping for specific targets. These data enable research on surface processes at fine scales and extents not previously possible yet essential for understanding processes (e.g., erosion, hillslope creep) at the scales at which they operate. OpenTopo will address the challenge of making massive LIDAR data sets and products readily accessible to end users through a freely accessible web-portal.