Long Island Streams_IfSAR view

This layer is a subset of ifsar derived streamlines for Long Island, Alaska. These data have Netmap derived synthetic attributes attributed to 100m reaches, and with symbology showing gradient classified into greater than or less than 12% grade. This grade break is to be a simgle attribute break for possible upper limit of occupancy of anadromous fish. This gradient break serves as rough estimate and is not to be taken as an absolute.本图层为阿拉斯加州长岛地区ifsar衍生流线的子集。该数据集包含Netmap衍生的合成属性，已关联至100米河段，并通过符号系统将坡度划分为大于12%与小于12%两类。该坡度分界为单一属性分界，用作洄游鱼类栖息上限的潜在参考阈值，此坡度分界仅为粗略估算值，不可作为绝对标准。