qbbox: computes bounding box

In RgoogleMaps: Overlays on Static Maps

computes bounding box

Description

The function qbbox computes a bounding box for the given lat,lon

points with a few additional options such as quantile boxes, additional margins, etc.

Usage

qbbox(lat, lon, TYPE = c("all", "quantile")[1], margin = list(m = c(1, 

    1, 1, 1), TYPE = c("perc", "abs")[1]), q.lat = c(0.1, 

    0.9), q.lon = c(0.1, 0.9), verbose = 0)

Arguments

lat	latitude values
lon	longitude values
TYPE	absolute or percentage trimming?
margin	relative or absolute margin around the data. Set to NULL if no margin desired.
q.lat	latitude quantile trimming, the tails will be trimmed from the bounding box
q.lon	longitude quantile trimming,
verbose	level of verbosity

Value

latR	latitude range
lonR	longitude range

Author(s)

Markus Loecher

Examples

lat = 37.85 + rnorm(100, sd=0.001);

lon = -120.47 + rnorm(100, sd=0.001);

#add a few outliers:

lat[1:5] <- lat[1:5] + rnorm(5, sd =.01);

lon[1:5] <- lon[1:5] + rnorm(5, sd =.01);



#range, discarding the upper and lower 10% of the data

qbbox(lat, lon, TYPE = "quantile");

#full range:

qbbox(lat, lon, TYPE = "all");

#add a 10% extra margin on all four sides:

qbbox(lat, lon, margin = list(m = c(10, 10, 10, 10), TYPE = c("perc", "abs")[1]));

 

RgoogleMaps documentation built on Nov. 6, 2023, 5:08 p.m.