Compute a bounding box

Compute a bounding box for a given longitude / latitude collection.

Usage

make_bbox(lon, lat, data, f = 0.05)

Arguments

lon

longitude

lat

latitude

data

(optional) a data frame containing lon and lat as variables

f

number specifying the fraction by which the range should be extended. if length 2 vector, applies to longitude and then latitude.

Examples

make_bbox(lon, lat, data = crime)
#> Error in eval(expr, envir, enclos): object 'crime' not found
make_bbox(lon, lat, data = crime, f = .20)
#> Error in eval(expr, envir, enclos): object 'crime' not found
make_bbox(lon, lat, data = crime, f = c(.20, .05))
#> Error in eval(expr, envir, enclos): object 'crime' not found

(lon <- sample(crime$lon, 10))
#> Error in eval(expr, envir, enclos): object 'crime' not found
(lat <- sample(crime$lat, 10))
#> Error in eval(expr, envir, enclos): object 'crime' not found
make_bbox(lon, lat)
#> Error in eval(expr, envir, enclos): object 'lon' not found
make_bbox(lon, lat, f = .10) # bigger box
#> Error in eval(expr, envir, enclos): object 'lon' not found