BLM OR Quads 12k Polygon Hub
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QUADS12_POLY: This theme depicts the 1:12,000 quadrangles for Oregon and Washington as defined in North American Datum 1927 (NAD27). These quads show the approximate...
QUADS12_POLY：本专题数据集呈现了以1927北美大地基准面（North American Datum 1927，NAD27）为基准定义的美国俄勒冈州与华盛顿州范围内的1:12000比例尺矩形分幅图幅。此类图幅大致展示了……
