ais_table: Produce a table of summary statistics for AIS traffic.

In ericmkeen/shipstrike: Utilities for spatially- and temporally-explicit predictions of whale-ship collisions

Produce a table of summary statistics for AIS traffic.

Description

Produce a table of summary statistics for AIS traffic.

Usage

ais_table(ais)

Arguments

ais

A data.frame of AIS traffic records for a single year. Each row is a position fix. Required fields: vid = Unique vessel identifier (numeric) type = Vessel type (character string) speed = Vessel speed, in knots (numeric) length = Vessel length, in meters (numeric) width = Vessel beam width, in meters (numeric) draft = Vessel beam width, in meters (numeric) datetime = Datetime in UTC, with format ⁠yyyy-mm-dd hh:mm:ss⁠ x = Longitude, decimal degrees (Western degrees negative) y = Latitude, decimal degrees (Southern degrees negative)

Value

A data.frame of summary statistics for each vessel type.

Examples

data(ais_2019)
ais_table(ais_2019)

ericmkeen/shipstrike documentation built on May 21, 2023, 7:05 a.m.