AIS Vessel Tracks 2015

Vessels traveling in U.S. coastal and inland waters frequently use Automatic Identification Systems (AIS) for navigation safety. The U.S. Coast Guard collects AIS records using shore-side antennas. These records have been filtered and converted from a series of points to a set of track lines for each vessel. Vessels can have one or more tracks of any length, and can be separated by gaps due to...

在美国沿海及内陆水域航行的船只，通常利用自动识别系统（AIS）以确保航行安全。美国海岸警卫队通过岸基天线收集AIS记录，并将这些记录进行筛选与转换，将一系列的点转化为每艘船只的轨迹线。船只可能拥有一条或多条任意长度的轨迹，且轨迹之间可能因某些原因而存在间隔。