[Liblas-devel] Number of points by return

[Mateusz Loskot]

Hi,

One of the LAS file header members is array of "number of points by
return". The LAS 1.x specifications do explain it in a few short
sentences and a few details are not clear to me, especially about
requirements/conditions.

Is it correct to assume that total of values of "number of points by
return" must be equal to "number of point records" ?

Simple tests seem to give answer Yes, for example:

number of point records: 213093
number of points by return: 128621, 84472, 0, 0

128621 + 84472 + 0 + 0 = 213093

Is it safe to assume it as a rule or not?

Cheers
-- 
Mateusz Loskot
http://mateusz.loskot.net