# Data from publication: 
# From single steps to mass migration: The problem of scale in the movement ecology of the Serengeti wildebeest
# Colin J. Torney,J. Grant C. Hopcraft,Thomas A. Morrison,Iain D. Couzin,Simon A. Levin


Files:
UAV_REL_POS.csv
GPS_COORDS.csv

Description:
UAV_REL_POS.csv contains relative coordinates of tracked wildebeest from UAV video footage. Data consists of the location of near neighbours to an individual in polar coordinates, with the focal individual centred at the origin and moving along the zero angle.
    Columns: 
    distance - is the distance between the focal individual and the neighbour
    relative_angle - is the angle between the heading of the focal individual and the position of the neighbour
    relative_heading - is the heading of the neighbour relative to the focal individual

GPS_COORDS.csv contains GPS locations of wildebeest tracked in the Serengeti between 1999 and 2016
    Columns:
    X - is the X-coordinate in metres with the origin taken as the average location of all wildebeest throughout the period
    Y - is the Y-coordinate in metres with the origin taken as the average location of all wildebeest throughout the period
    XV - is the X-component of the velocity calculated as the difference between the current day and the next day
    YV - is the Y-component of the velocity calculated as the difference between the current day and the next day
    XV_PREV - is the value of XV on the previous day
    YV_PREV - is the value of XV on the previous day