On Tue, Feb 09, 2010 at 10:10:24PM +0100, Torstein Finnesand wrote:
Below is a part of the therion.log file. It says "Survey has 2 connected components." What is this?
It means (Survex thinks) there are two survey networks which are connected within each other, but not to each other. So two separate caves, each fixed by a GPS fix for example. But your survey has no fixed points (just an invented one) so that shouldn't work. You need at least as many fixed points as connected components.
It also says that there are 87 loops. But when I count them in therion.log, there are 86 (which should be correct, I think: 3007-2922+1).
The formula used is: #legs - #stations + #connected_components So the bug here is that it is deciding there's a second component.
If I rearrange (sort) the centerline data, and compile again, - the sentence is gone. It says that there are 86 loops (a part of that therion.log is shown below s well).
There must be something about the first arrangement which the colouring algorithm used to find the components isn't handling. If you're willing/able to send me the first dataset, or a cut down version which Survex still incorrectly claims to have 2 connected components, that would be very helpfully in tracking this down. Cheers, Olly