Takes an area as an sf object or a bounding box and returns a bounding box that matches the provided aspect ratio and contains the area or bounding box provided.
Usage
st_bbox_ext(
x = NULL,
dist = NULL,
diag_ratio = NULL,
asp = NULL,
unit = NULL,
crs = NULL,
class = "bbox",
null.ok = TRUE
)
st_bbox_asp(x = NULL, asp = NULL, class = "bbox")Arguments
- x
An object sf, bbox, sfc, raster, or sp object or a data frame that can be converted to an sf object or a list of sf, bbox, or sfc objects. st_bbox_asp also supports vectors in the same format as a bbox object.
- dist
buffer distance in units. Optional.
- diag_ratio
ratio of diagonal distance of area's bounding box used as buffer distance. e.g. if the diagonal distance is 3000 meters and the "diag_ratio = 0.1" a 300 meter will be used. Ignored when
distis provided.- asp
Aspect ratio of width to height as a numeric value (e.g. 0.33) or character (e.g. "1:3"). If numeric,
get_asp()returns the same value without modification.- unit
Units for buffer. Supported options include "meter", "foot", "kilometer", and "mile", "nautical mile" Common abbreviations (e.g. "km" instead of "kilometer") are also supported. Distance in units is converted to units matching GDAL units for x; defaults to "meter"
- crs
Coordinate reference system of bounding box to return
- class
Class of object to return (sf or bbox); defaults to "bbox".
- null.ok
If
TRUEand x isNULL, returnNULL.