Concerning the determination of the declination of a vertical wall, I have found useful the small program (and procedure) described by Mr. Yvon MASSE at: http://www.apro.fr/usr/ymasse/orient.htm Bruno
Concerning the determination of the declination of a vertical wall, I have found useful the small program (and procedure) described by Mr. Yvon MASSE at: http://www.apro.fr/usr/ymasse/orient.htm Bruno