Quadrangle boundaries at 1:250,000 scale for the conterminous United States
收藏DataONE2016-10-29 更新2024-06-26 收录
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资源简介：
Map quadrangle boundaries at the 1:250,000 scale for the
conterminous US were taken from the GIRAS data originally produced
by EPA in the late 1970s.
美国本土1:25万比例尺地图四边形图幅的边界数据，源自美国环境保护署（EPA，Environmental Protection Agency）于20世纪70年代末原始生成的GIRAS数据集。
创建时间：
2016-10-29
