Earthworks inventory across the southwestern USA

The inventory was completed by Dr. Mary H Nichols (USDA-ARS Southwest Watershed Research Center), Michelle Cavanaugh (USDA-ARS Southwest Watershed Research Center), and Dr. Haiqing Xu (University of Arizona) using 1-meter LiDAR derived Digital Elevation Model (DEM) hillshades where available and checked using aerial imagery. It is possible that some earthworks were missed due to structure size, topography, or other obstacles/limitations.1-meter DEM data can be sourced from the USGS National Map (Elevation Products) at: https://apps.nationalmap.gov/downloader/File details:Earthworks Inventory.shp – Point shapefile of earthworks features (berms, tanks, and other earthworks built on the landscape for water diversion, spreading, and/or retention) as observed from 1-meter LiDAR derived DEM hillshades where available and checked using aerial imagery.The following files support the .shp file:• Earthworks Inventory.dbf - mandatory file• Earthworks Inventory.shx - mandatory file• Earthworks Inventory.cpg• Earthworks Inventory.prj• Earthworks Inventory.sbn• Earthworks Inventory.sbxEarthworks Inventory.geojson – The same data held within Earthworks Inventory.shp in an open standard format.

本数据集的清查工作由玛丽·H·尼科尔斯博士（USDA-ARS西南流域研究中心）、米歇尔·卡瓦诺（USDA-ARS西南流域研究中心）以及徐海清博士（亚利桑那大学）完成。清查过程中使用了可获取的1米分辨率激光雷达（LiDAR）生成的数字高程模型（DEM）晕渲图，并通过航空影像进行校核。由于构筑物尺寸、地形或其他障碍/限制因素，部分土方工程可能未被识别。

1米分辨率DEM数据可从美国地质调查局（USGS）国家地图（高程产品）获取，网址为：https://apps.nationalmap.gov/downloader/

文件详情：Earthworks Inventory.shp——基于可获取的1米LiDAR生成的DEM晕渲图识别，并经航空影像校核得到的土方工程要素点位矢量shapefile，此类要素包括用于地表分水、配水及/或蓄水的土堤、蓄水池及其他同类土方构筑物。

配套支持.shp文件的内容如下：
• Earthworks Inventory.dbf - 必备文件
• Earthworks Inventory.shx - 必备文件
• Earthworks Inventory.cpg
• Earthworks Inventory.prj
• Earthworks Inventory.sbn
• Earthworks Inventory.sbx

Earthworks Inventory.geojson——以开放标准格式存储的与Earthworks Inventory.shp完全一致的数据集。