# number of nodes: XXX
# <structure_name>: <structure_number> <structure_start_node>
<structure_name>is 'pia_line', 'axon', or 'white_matter_line'. The relevant node data follows directly after this line.
||Daughter Node 1
||Daughter Node 2
||contiguous, starting from '0'
||'0' - structure start point
'1' - bifurcation point
'2' - continuous point
'4' - other
|The node number of the
'-1' if the node has no parent.
|The node number of the first
'-1' if there are no daughters, i.e. terminal branch.
Otherwise (branchpoint or continuous point), numbering is continuous from the parent node.
|The start node number of the
second daughter branch (parent)
'-1' if there are no daughter nodes, i.e. when this node represents a terminal point or continous point.
'y', 'z' are spatial co-ordinates, given in micrometers.
'diameter' is dendrite thickness, also given in micrometers. Diameter is omitted for non-axon data, and for axon bifurcation points.