Hydrography Change Detection: The Usefulness of Surface Channels Derived From LiDAR DEMs for Updating Mapped Hydrography 1
Hydrography Change Detection: The Usefulness of Surface Channels Derived From LiDAR DEMs for Updating Mapped Hydrography 1
复制标题
海道测量变化检测：源自 LiDAR DEM 的表面通道在更新测绘水道测量中的有用性 1
DOI：
10.1111/jawr.12027
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
B. Worstell
中科院分区：
文献类型：
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作者：
S. Poppenga;D. Gesch;B. Worstell
摘要： 1:24,000 比例尺的高分辨率国家水文学数据集 (NHD) 绘制的水文学流线需要定期更新，因为影响地表河道排水的地表条件会随着时间的推移而变化。从历史上看，NHD 流线是通过将航空摄影和纸质地图中的地表水信息数字化而创建的。使用这些相同的方法来更新全国 NHD 流程线成本高昂且效率低下；此外，这些方法导致水文学缺乏可用于绘图和科学研究的完全集成数据集所需的水平和垂直精度。改进地图水文学的有效方法是利用从光探测和测距 (LiDAR) 数字高程模型 (DEM) 和 NHD 流线导出的表面通道的变化检测分析。在本文中，我们描述了从 LiDAR DEM 导出的表面通道在水文变化检测中的有用性，以导出空间精确且时间相关的水文地图。该方法利用 LiDAR 得出的表面通道和 NHD 流线之间的水平和垂直差异进行分析来定义水文变化的候选位置。这些方法减轻了分析和更新全国 NHD 时间相关水文学的需要，并为更新发生变化的数据集提供了途径。
Abstract: The 1:24,000‐scale high‐resolution National Hydrography Dataset (NHD) mapped hydrography flow lines require regular updating because land surface conditions that affect surface channel drainage change over time. Historically, NHD flow lines were created by digitizing surface water information from aerial photography and paper maps. Using these same methods to update nationwide NHD flow lines is costly and inefficient; furthermore, these methods result in hydrography that lacks the horizontal and vertical accuracy needed for fully integrated datasets useful for mapping and scientific investigations. Effective methods for improving mapped hydrography employ change detection analysis of surface channels derived from light detection and ranging (LiDAR) digital elevation models (DEMs) and NHD flow lines. In this article, we describe the usefulness of surface channels derived from LiDAR DEMs for hydrography change detection to derive spatially accurate and time‐relevant mapped hydrography. The methods employ analyses of horizontal and vertical differences between LiDAR‐derived surface channels and NHD flow lines to define candidate locations of hydrography change. These methods alleviate the need to analyze and update the nationwide NHD for time relevant hydrography, and provide an avenue for updating the dataset where change has occurred.