Creates a vector or a list of vectors of bounding coordinates around point records (xy records).
This is an internal function used by function
backgroundGrid.
boundingCoords(xy)Data frame or list of data frames with coordinates (each row is a point)
A vector or a list of vectors with bounding coordinates in the following form: c(x1, x2, y1, y2).
Iturbide, M., Bedia, J., Herrera, S., del Hierro, O., Pinto, M., Gutierrez, J.M., 2015. A framework for species distribution modelling with improved pseudo-absence generation. Ecological Modelling. DOI:10.1016/j.ecolmodel.2015.05.018.