That above is true if loop closure done manually by using equate command.There are also loops with silent closure, or chains of stations like:
1-2-3-4-5-1
If you need to automate that kind of loop closures, need to rename last station '1'to something else, and use 'equate' command through all your centerline data.
_______________________________________________ Therion mailing list Therion@speleo.sk https://mailman.speleo.sk/listinfo/therion