Lower Rio Puerco 1935 georeferenced aerial photographs

The 1935 images were obtained as digitally scanned versions of aerial photographs acquired by the U.S. Department of Agriculture at a scale of 1:31,680. The actual date of image acquisition is not known. The images were previously scanned at 600 dpi to produce a nominal pixel size of 1.28 m (Friedman et al., 2015). The images were registered and rectified using identifiable common points from the 1996 DOQQs. See description of positional accuracy below. Data derived from features mapped from the 1935 images were presented in: Friedman, J.M., Vincent, K.R., Griffin, E.R., Scott, M.L., Shafroth, P.B., and Auble, G.T., 2015, Processes of arroyo filling in northern New Mexico, USA, GSA Bulletin, 127(3/4), 621-640. doi: 10.1130/B31046.1本数据集所收录的1935年影像，为美国农业部（U.S. Department of Agriculture）获取的航空照片的数字化扫描成果，扫描比例尺为1:31680。影像实际获取日期暂未明确。此前该批影像以600dpi（每英寸点数）进行扫描，标称像素尺寸为1.28米（Friedman等，2015）。本批影像通过匹配1996年DOQQs（数字正射影像四分幅，Digital Orthophoto Quarter Quadrangles）中的可识别公共控制点完成配准与纠正，具体位置精度说明详见下文。基于该1935年影像解译提取的地物要素数据已发表于以下文献：Friedman, J.M.、Vincent, K.R.、Griffin, E.R.、Scott, M.L.、Shafroth, P.B. 及 Auble, G.T.，2015年，《美国新墨西哥州北部冲沟充填过程》，《美国地质学会通报（GSA Bulletin）》，第127卷第3/4期，第621-640页。DOI: 10.1130/B31046.1