def testOnlyCircleEncode(self): lon = 1. lat = -2. radius = 4 precision = 3 c1 = AreaNoticeCircle(lon, lat, radius, precision) bits = c1.get_bits() c2 = AreaNoticeCircle(bits=bits) self.checkCircle(c2, 1, lon, lat, precision, radius)
def testEncodeCircleMatchingUSCG(self):
"""Make sure we can recreate the bits in the USCG circle test."""
msg = '!AIVDM,1,1,0,A,85M:Ih1KmPAU6jAs85`03cJm;1NHQhPFP000,0*19'
# grab just the sub area portion
circle_msg = msg.split(',')[5][-16:]
c1_bits = binary.ais6tobitvec(circle_msg)
c1 = AreaNoticeCircle(bits=c1_bits)
lon = -71.935
lat = 41.236666667
scale_factor = 10
precision = 4
radius = 1800
self.checkCircle(c1, scale_factor, lon, lat, precision, radius)
# Now we build the same, must force the scale factor to match USCG
c2 = AreaNoticeCircle(c1.lon, c1.lat, c1.radius, c1.precision, scale_factor)
self.checkCircle(c2, scale_factor, lon, lat, precision, radius)
c2_bits = c2.get_bits()
c3 = AreaNoticeCircle(bits=c2_bits)
self.checkCircle(c3, 10, lon, lat, precision, radius)
