Purchase and Distribution of a new Digital Elevation Model of the Kuparuk Watershed, Alaska, for NSF Arctic Scientists

为 NSF 北极科学家购买和分发阿拉斯加库帕鲁克流域的新数字高程模型

• 批准号: 0207220
• 负责人: Matt Nolan
• 金额: $ 13.37万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-03-01 至 2003-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0207220&HistoricalAwards=false
• 关键词: Purchase; Distribution; new; Digital; Elevation

The team, lead by Nolan, will purchase, validate, and distribute a new, high resolution Digital Elevation Model (DEM) of the Kuparuk River watershed in northern Alaska, for use by all NSF funded scientists who require such data for their research. In the Alaskan Arctic the only DEMs commonly available are those from the USGS, with pixel size of roughly 60 m x 90 m and vertical accuracy of about 15 m. These DEMs often have large errors at the sheet boundaries, making them difficult to mosaic accurately. In contrast, the Star3i X-band airborne-radar system operated by Intermap Technology Corporation, creates a topographically seamless DEM at 5 m pixel size with a mean vertical error of 1 to 3 m, depending on product purchased. Intermap acquired the Kuparuk watershed in August of 2001, and this DEM is now available as an off-the-shelf product. The distribution package made available to NSF researchers will include more than the raw data. The team will validate the new DEMs for accuracy, principally through comparing hydrologic channel networks created from the DEMs with those found in the real world. They will also produce vector layers of these stream channels for use in many GIS applications, and calculate some basic hydrological information on the watershed. They will include a variety of shareware software to allow novice users to easily access the data, as well as include a number of still images and animations for use in analysis and outreach. Finally, they will include a number of references and technical specifications to help new users understand the limitations of the data. The DEM will be made available to all NSF researchers through JOSS.

由诺兰领导的团队将购买、验证并分发阿拉斯加北部库帕鲁克河流域的一个新的高分辨率数字高程模型（DEM），供所有需要这些数据进行研究的国家科学基金会资助的科学家使用。在阿拉斯加北极地区，唯一可用的dem是USGS提供的，像素大小大约为60米× 90米，垂直精度约为15米。这些dem通常在薄片边界处有很大的误差，使它们难以精确地镶嵌。相比之下，由Intermap技术公司运营的Star3i x波段机载雷达系统可以创建5米像素尺寸的地形无缝DEM，平均垂直误差为1至3米，具体取决于所购买的产品。Intermap在2001年8月收购了Kuparuk流域，现在这个DEM已经是现成的产品了。提供给NSF研究人员的分发包将包括比原始数据更多的内容。该团队将验证新的dem的准确性，主要是通过将dem创建的水文通道网络与现实世界中的水文通道网络进行比较。他们还将生成这些河道的矢量层，用于许多地理信息系统应用，并计算流域的一些基本水文信息。它们将包括各种共享软件，让新手用户可以轻松访问数据，同时还包括一些静态图像和动画，用于分析和推广。最后，它们将包括一些参考和技术规范，以帮助新用户理解数据的局限性。DEM将通过JOSS提供给所有NSF研究人员。