g_envelope() computes and returns the bounding envelope(s) for the input
geometries. Wrapper of OGR_G_GetEnvelope() / OGR_G_GetEnvelope3D() in
the GDAL Geometry API.
Value
Either a numeric vector of length 4 containing the 2D envelope
(xmin, xmax, ymin, ymax) or of length 6 containing the 3D envelope
(xmin, xmax, ymin, ymax, zmin, zmax), or a four-column or six-column
numeric matrix with number of rows equal to the number of input geometries
and column names ("xmin", "xmax", "ymin", "ymax"), or
("xmin", "xmax", "ymin", "ymax", "zmin", "zmax") for the 3D case.