def closeEnough(lat1,lon1,loc2):
    """Return true if the two points are within approx 40 miles of each other
    This only measures x & y delta (not true distance)
    A degree latitude ~ 69 miles
    A degree longitude (at this latitude) ~ 47 miles
    """
    deltax = lat1 - loc2[0]
    deltay = lon1 - loc2[1]
    return -0.6 < deltax < 0.6 and -0.9 < deltay < 0.9