iparse syntax and arguments

[ken yates]

what is the meaning of the letters in th argument of the -iparse
option?
i understand xyz, but what is t, i and a and others?

[Martin Isenburg]

Hi Ken.

The '-iparse tsxyz' flag specifies how to interpret each line of the
ASCII file. For example, 'tsxyzssa' means that the first number is the
gpstime, the next number should be skipped, the next three numbers are
the x, y, and z coordinate, the next two should be skipped, and the
next number is the scan angle. The other supported entries are i -
intensity, n - number of returns of given pulse, r - number of return,
c - classification, u - user data, and p - point source ID, e - edge
of flight line flag, and d - direction of scan flag, R - red channel
of RGB color, G - green channel, B - blue channel ...

This is copied from:

http://lastools.org/download/txt2las_README.txt

Another way to find out is to use '-iparse Q' or '-oparse J' with an
invalid character ... (-:

C:\lastools\bin>las2las -i ..\data\dallas1.xyzcirn.gz -iparse Q
ERROR: unknown symbol 'Q' in parse string. valid are
'x' : the x coordinate
'y' : the y coordinate
'z' : the z coordinate
't' : the gps time
'R' : the red channel of the RGB field
'G' : the green channel of the RGB field
'B' : the blue channel of the RGB field
's' : a string or a number that we don't care about
'i' : the intensity
'a' : the scan angle
'n' : the number of returns of that given pulse
'r' : the number of the return
'E' : a terrasolid echo encoding
'c' : the classification
'u' : the user data
'p' : the point source ID
'e' : the edge of flight line flag
'd' : the direction of scan flag

Cheers,

Martin @lastools