Comment 1 for bug 1515951

Does not exist the "true lines" of constellations and the various atlases has different lines for constellations.

For example, see Andromeda:
1) on IAU website: http://www.iau.org/static/public/constellations/gif/AND.gif
2) on Wikipedia website: https://commons.wikimedia.org/wiki/File:Andromeda_constellation_map_ru_lite.png
3) on ESO website: https://www.eso.org/public/outreach/eduoff/cas/cas2002/cas-projects/france_andromeda_1/const.gif
4) on stargazing.net: http://www.stargazing.net/david/gif/constellations/andromeda518x386.gif
5) on school-portal.co.uk: http://www.school-portal.co.uk/GroupDownloadFile.asp?GroupId=245765&ResourceId=988252
6) etc.

You can use various Western skycultures (H.A. Ray or Sky & Telescope's set of lines ) or a create a own one.