[Gmsh] significaint digits

[Mando Guido Blöcher]

hi gmsh users and developer,

i got an geological model in km-scale including a well in cm-scale.
i want to mesh this probleme, but the coordinates of the nodes have only 
six significant digits.

for example:

the geo file contains:
Point(1)={405896.936541,5862239.109745,-3813.57226245,0.037306226245};
Point(2)={405896.935972,5862239.122684,-3813.57106584,0.037306106584};
Point(3)={405896.933154,5862239.135327,-3813.56990527,0.037306990527};

but gmsh only use:

405896,5.86223e+06,...etc.


is there a possibilty to increase the accuracy of the readed node data?
the setting geometry->general->geometry tolerance does not work!

best regards guido