Stream Crossing Sites - Alabama

This dataset represents possible stream crossings by roads in Alabama and surrounding states counties that are overlapped by a SHU/SRRU. The crossings were identified by intersecting the 2010 Tiger line road layers with the NHD HiRes stream layer. Each crossing was giving a Crossing ID. Crossing ID's were created using the FIPS code with the addition of a 4 digits in this fashion: 01003-0000. The layer was then modified to include the stream_crossing_id created by the Database of Stream Crossings in the United State by the USGS. The dataset has not been QC'd to determine if all potential crossing do exist. It was created as a means to easily find crossings and apply an ID for crossing surveys. Sites that do not exist are removed from the database as they are found.本数据集涵盖阿拉巴马州及周边各州郡县内被SHU/SRRU覆盖的道路与溪流的潜在交叉点。该交叉点通过将2010年Tiger线路（Tiger line）道路图层与NHD HiRes溪流图层进行空间相交运算识别得到。每个交叉点均被分配有交叉点ID（Crossing ID），其生成规则为以FIPS代码（Federal Information Processing Standard code）为基础追加4位数字，格式示例为01003-0000。随后对该图层进行了更新，新增了由美国地质调查局（USGS）美国溪流交叉点数据库生成的stream_crossing_id字段。本数据集尚未经过质量控制（QC）验证，无法确认所有潜在交叉点均真实存在。本数据集的构建初衷为便捷查找溪流交叉点，并为交叉点调查工作分配统一标识。在后续排查中，已确认不存在的点位将从数据库中移除。