Converting datas to survex input

[Jerome Alet]

Hi,

I'm planning to do some tests with cavern, and I've got a lot of fixed
points but I've only got their Lambert coordinates (Lambert coordinates
are used in France). What I've got is (x,y) Lambert(III) and altitude in
metres. Does someone know if Lambert coordinates can be used directly with
cavern or if I must convert them to another coordinates system ? 

I've tried to convert Lambert coordinates to longitude+latitude and then
convert this to cartesian coordinates but I'm not sure if this is the
right thing to do, because this conversion gives me new X and Y but also
gives me a Z which is different from my altitude.

Anyone can help ?

Thanks in advance.

Jerome Alet - alet@unice.fr - http://cortex.unice.fr/~jerome
Fac de Medecine de Nice        http://wwwmed.unice.fr 
Tel: (+33) 4 93 37 76 30     Fax: (+33) 4 93 53 15 15
28 Avenue de Valombrose - 06107 NICE Cedex 2 - FRANCE