Digital Orthoimagery for Mapping the Natchez Trace Parkway 2004

This dataset represents aerial photography of the Natchez Trace Parkway that was taken in late September and early October of 2004. Images were acquired during leaf-on conditions as required by the National Park Service (NPS) to accomplish their ground-based vegetation classification. Nearly 400 aerial photography frames were scanned and orthorectified to generate digital orthophoto quarter quads (DOQQs). These were cut to match existing DOQQs creating a total of 235 DOQQs for the entire 715 km long Parkway. For ease of use, the DOQQs were grouped into 11 mosaics, each covering a section of the Parkway. At the request of the NPS, each mosaic was divided into ten tiles to allow for efficient loading on less robust computers.

本数据集包含2004年9月末至10月初拍摄的纳奇兹小道公路（Natchez Trace Parkway）航空摄影影像。所有影像均按照美国国家公园管理局（National Park Service，NPS）开展地面植被分类工作的要求，在植被有叶状态下采集。研究团队对近400幅航摄框幅进行扫描与正射校正，生成数字正射影像四分之一幅（digital orthophoto quarter quads，DOQQs）。随后将生成的影像裁剪以匹配现有DOQQ格式，最终为全长715公里的纳奇兹小道公路生成总计235幅DOQQs。为便于使用，所有DOQQs被整合为11幅影像镶嵌图，每幅覆盖该公路的一段区段。应NPS的要求，每幅镶嵌图又被拆分为10个影像瓦片，以适配配置较低的计算机实现高效加载。