|
description:
|
This raster dataset is a gridded representation of the density for 2014 of ship traffic in waters surrounding St. Thomas and St. John. This layer was created by converting Automatic Identification System (AIS) point data obtained from the US Coast Guard for individual ships into tracklines of ship traffic density in order to standardize out variation in movement of the ships. The length of the tracklines was calculated across all the ships in each 100 m grid cell, thus grid cells where ships were constantly passing across it would have more tracklines. |