AddStepLengthAndAngles: Add step length and angle to location data

In Blakemassey/gisr: Functions for Spatial Data Manipulation and Plotting

Description

Calculates step length, absolute angle (N=0), and turn angle between successive point locations

Usage

AddStepLengthAndAngles(df, by, datetime, long, lat)

Arguments

df	dataframe with locations and datetime data
by	column name to use to split, analyze, and merge data, default is "id"
long	longitude, must be in UTM, default is "long_utm"
lat	latitude, must be in UTM, default is "lat_utm"

Details

Coordinates must be in identically-scaled units (e.g. UTM meters). If lat and long are in degrees, project coordinates to UTM with 'rgdal' package before running this function.

Value

dataframe with "step_length", "abs_angle", and "turn_angle" columns

Blakemassey/gisr documentation built on Aug. 30, 2020, 12:14 a.m.