"%f,%f,%f,%f"
The rectangle llx,lly,urx,ury gives the coordinates, in points, of the lower-left corner (llx,lly) and the upper-right corner (urx,ury).
llx,lly,urx,ury
(llx,lly)
(urx,ury)
rect
"%f,%f,%f,%f"The rectangle
llx,lly,urx,urygives the coordinates, in points, of the lower-left corner(llx,lly)and the upper-right corner(urx,ury).