calc_zoom {ggmap} | R Documentation |
Calculate a zoom given a bounding box
Description
calc_zoom can calculate a zoom based on either (1) a data frame with longitude and latitude variables, (2) a longitude range and latitude range, or (3) a bounding box (bbox specification). The specification for (1) is identical to that of most R functions, for (2) simply put in a longitude range into lon and a latitude range into lat, and for (3) put the bounding box in for the lon argument.
Usage
calc_zoom(lon, lat, data, adjust = 0, f = 0.05)
Arguments
lon |
longitude, see details |
lat |
latitude, see details |
data |
(optional) a data frame containing lon and lat as variables |
adjust |
number to add to the calculated zoom |
f |
argument to pass to make_bbox |
See Also
Examples
# From data
calc_zoom(lon, lat, wind)
# From range
lon_range <- extendrange( wind$lon )
lat_range <- extendrange( wind$lat )
calc_zoom(lon_range, lat_range)
# From bounding box
box <- make_bbox(lon, lat, data = crime)
calc_zoom(box)
[Package ggmap version 4.0.0 Index]