getMap: Get a Map of Appropriate Size

In EricArcher/PAMsbuoy: Manipulation and filtering for PAM (Passive Acoustic Monitoring) data collected from sonobuoys

Description

Return a ggmap object centered on the middle of the positions data. Will start zoomed in then gradually zoom out until all points fit unless force is TRUE

Usage

getMap(
  positions,
  force = FALSE,
  zoom = 10,
  center = NULL,
  quiet = FALSE,
  offline = FALSE,
  bounds = NULL
)

Arguments

positions	data frame containing columns Latitude and Longitude
force	flag whether or not to force a specific zoom level instead of finding it automatically
zoom	zoom level used for the map. An integer, see zoom description in get_map function of ggmap
center	the location to center the map on. If NULL, will use the mean of the range of the data. If not NULL it must be a named vector with values lon and lat
quiet	FALSE to report zoom level used
offline	flag whether or not to run in offline mode. Offline mode will use coastline files from naturalearthdata.com and a mercator projection.
bounds	optional, the boundaries of a box that must be within the output plot. Used to extend the plotted area, especially useful for the offline mode. Specified as the lat / long coordinates of the lower left and upper right corners.

Author(s)

Taiki Sakai [e-mail]

EricArcher/PAMsbuoy documentation built on March 3, 2021, 5:56 a.m.