Hi everyone,
I have wrote an articles regarding the measurement of using 羅經 before. Coz the building construction is in 3-D , I think it is hard to determine the degree of angle from 羅經 that parallel to the door opening. Therefore , I think it must be a special way to take the measurement, especially the tall, big building around us. Well, I hope to see more discussions about it.
Thx anyway,
Phil :emm01: