[1] Well-known text - Wikipedia (2017-05-22 12:14:14 +09:00) https://ja.wikipedia.org/wiki/Well-known_text#Well-known_binary
[2] The well-known binary representation (2004-06-11 02:10:17 +09:00) http://edndoc.esri.com/arcsde/9.0/general_topics/wkb_representation.htm