[Liblas-devel] GPS time and intensity?

[Jason Woolard]

Thanks for the intensity fix Howard. Seems to be working now.

On the GPS time issue, I think it's definitely important to have more 
precision than the nearest second. The GPS/Inertial or trajectory data 
is usually measured at ~200 Hz and one of the useful things about having 
the GPS time stamp is the ability to match up a particular pulse with 
the corresponding time in the vehicle trajectory or scanner angle data. 
Commercial topographic lidar systems are now pulsing at 100 kHz + so 
having the times rounded to a second would mean you could potentially 
have 100,000 points or more with identical times. In addition, the time 
stamp will be even more important as laser waveform data becomes more 
mainstream.

Thanks again for the help,
Jason


Mateusz Łoskot wrote:
> Folks,
>
> I've asked the LAS Format board for GPS time clarification:
>
> http://lidarbb.cr.usgs.gov/index.php?showtopic=5038
>
> Best regards,