I have some caves where surveying started with Series 1.0 a few 100m inside the cave and then a survey series joined to the entrance later.
How do I reference the cave coordinates and elevation to the actual entrance? It seems stuck at Series 1.0 down inside the cave.
Thanks.

Hi Mark,

In CRP, when a shot has RefPassage/RefStation = Passage/Station, then it is considered as a Ref point (=entrance or a junction station between 2 caves if you have filled in the RefCave column)
if 1.0 is inside the cave, you should name it 1.0x 1.0 otherwise CRP will consider the station as the entrance. and to have your entrance placed at the actual location defined in the bottom right box (lat/long/alt), let's say it is station 1.5, you'll need to have a line with 1.5 1.5.
Attached an example of a survey done from the end of a cave to the entrance.


Hope this help
Thomas

Thankyou I will use this per example you provided. Sorry for delay in acknowledgement but I was away on expedition in India.