1 
2 
3 
4 
5 
6 
7 

data type 
Sample number 
Parent Sample 
x position 
y position 
z position 
length  diameter 
data value 
contiguous, starting from '0' 
Sample 0, representing the soma,
has parent 1. Tree root sample have parent 0. 
'x',
'y', 'z' are spatial coordinates, given in micrometers. 'length' is the scalar distance between this point and its parent. 'diameter' is dendrite thickness, also given in micrometers. In the case of the first point,it repesent a cylinder of dimensions length x diameter. 