Hi Howard,

Thanks for replying. I submitted the issue on github - I'll try to work on a 
patch as well as soon as some time frees up.

Charles

On Nov 16, 2011, at 7:28 AM, Howard Butler wrote:

> 
> On Nov 15, 2011, at 5:37 PM, Charles Cowart wrote:
> 
>> Hello,
>> 
>> I'd like to ask the community if it has become standard practice to generate 
>> LAS files with absolute GPS time values using liblas 1.6.1. It does not 
>> appear to me that absolute GPS time is supported in liblas as it's defined 
>> in the las 1.2 specification. Specifically, it does not appear that there is 
>> a function in txt2las to set the lowest-order bit in the reserved field to 1 
>> when specifying such values. I would think however, that it would be fairly 
>> straightforward to interpret the value as absolute if it is greater than the 
>> number of seconds in a week. Do others have experience with this issue?
> 
> This is simply an oversight, and I don't think anyone has had the need for it 
> in 1.2 yet.  Can you file a ticket on github (patches graciously accepted :) 
> that models how you would like to be able to modify this value via txt2las 
> (and other utilities too, I suppose)?  I'll try to clean this one up before 
> the release.
> 
> Howard

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