Quarter Quad Index 250K

This dataset is the Quadrangle Index 1:250,000 scale for the 1 degree by 2 degree statewide quadrangle grid, NAD 1983 tile boundaries.本数据集为适配1°×2°全州范围象限格网的1:25万比例尺象限索引（Quadrangle Index），其瓦片边界采用北美1983大地基准（North American Datum 1983, NAD 1983）。