[Therion] How to extract the length of each centerline ?

[Marco Corvi]

hi xavier,

just export as database, say with output "cave.sql",
make a db with it: "sqlite3 cave.db< cave.sql".
open the db and select from the table centreline: "sqlite3 cave.db" and at the prompt

"select title, length from centreline;" 

or "select title, length from centreline where title not null;"
use ".schema centreline" to see the fields of the table,
".help"for help.


marco



________________________________
 From: Xavier Robert <xavier.robert01 at gmail.com>
To: Therion <therion at speleo.sk> 
Cc: stephane lips <stephane.lips at free.fr> 
Sent: Tuesday, May 29, 2012 11:43 AM
Subject: [Therion] How to extract the length of each centerline ?
 
Hi all,

I am still working on the survey of the Jean-Bernard system in the French Alps. I have a bunch of different centerlines series, and I need to extract the length of each centerline to link them to the history of the exploration/surveying.

I understood how to export the SQL database of the cave system, however, as I do not know at all how to deal with SQL databases, I wondering if there is there an easy way to extract this information with a command similar to "export survey-list" ? The best will be an output like "centerline_ID - Station_first - Station_last - Centerline_length - Topo_date" !

Cheers,

Xavier



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