Is there a name for the shape of the area defined by two sets of geographic coordinates, for example by a northwestern and southeastern corner? In other words, the shape bounded by two degrees of longitudes and two degrees of latitude? Since it's on a sphere/ellipsoid, it's not a rectangle or a trapezoid. Is there another good name for it then? A quadrangle? I've looked on wikipedia, google and stackexchange, but couldn't find anything.