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@gmail.com> To: Therion <therion@speleo.sk> Cc: stephane lips <stephane.lips@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 _______________________________________________ Therion mailing list Therion@speleo.sk http://mailman.speleo.sk/mailman/listinfo/therion