[GRASS-user] Creating LiDAR first pulse vector map

GRASS GRASS user
1

I am still fighting with the LiDAR tools, but I feel like I am close...
I thought I had sorted the v.lidar.growing problem as it appears to run
when using sqlite backend. But the resulting output was only a small
portion of the output?

For v.lidar.growing, is there any special way to create the first pulse
vector map?
I feel this may be where my problem comes from.

(Currently I was just using the raw data from the lidar text file which
includes X Y Z and intensity readings for all points.)

Thanks

--
Jack Lonsdale,

2

Jack, usually lidar data I have seen so far, have also information on pulse other then X Y Z Intensity
Maybe you could check if you have couples of points with really close coordinates and different Z.
If it is, I guess your file is listing one point for each returned pulse... and in this case you should make some scripting to extract the first and last pulse...

Maxi

Jack Lonsdale wrote:

I am still fighting with the LiDAR tools, but I feel like I am close...
I thought I had sorted the v.lidar.growing problem as it appears to run
when using sqlite backend. But the resulting output was only a small
portion of the output?

For v.lidar.growing, is there any special way to create the first pulse
vector map? I feel this may be where my problem comes from.

(Currently I was just using the raw data from the lidar text file which
includes X Y Z and intensity readings for all points.)

Thanks

--

Dr. Eng. Massimiliano Cannata
Responsabile Area Geomatica
Istituto Scienze della Terra
Scuola Universitaria Professionale della Svizzera Italiana
Via Trevano, c.p. 72
CH-6952 Canobbio-Lugano
Tel: +41 (0)58 666 62 14
Fax +41 (0)58 666 62 09