[Liblas-devel] Re: las2txt question

[Howard Butler]

Etienne,

I am in the process of rewriting las2txt to use the C++ API (so we get the new-style filters, etc).  I have everything done except for the header writing portion.  After looking at it a bit, I'm wondering if it is that useful in its current form.  Do you expect that las2txt output of a header should be easily parseable, or you expect it to act much like a comment block at the front of a source code?  

As it is right now, las2txt's header output does neither very well.  It would be quite simple to have las2txt output libLAS' xml-ification of the header if the user specified a --header argument in the invocation.  Would this be useful?  Or is the intention that the header in the front of a .txt xyz LAS file is must cursory information that can't actually be used to get back to the original LAS file?

Howard


On Oct 28, 2010, at 3:44 PM, Etienne Bellemare wrote:

> Good point, I'd like to suggest also the ability to specify the header separated the same way the fields are going to be. It will create a much more consistent file. e.g. for the moment you can't use tab to seperate header even if your fields are. Having the ability to set a name for the header could be a nice feature too.
> 
> Thanks again,
> Etienne
> 
> On Thu, Oct 28, 2010 at 4:22 PM, Howard Butler <hobu.inc at gmail.com> wrote:
> 
> On Oct 28, 2010, at 3:16 PM, Randy Bucciarelli wrote:
> 
> > Hi Howard,
> >
> > Is there a way to format resulting precision of values from the output of las2txt?
> >
> > Or does 'las2txt' simply output the precision of the values how there were initially stored when creating LAS files?
> 
> There isn't, but I agree there should be an option to set/override the precision of x/y/z values (independently)  I have rewritten lasinfo and las2las using the new C++ API, and I think las2txt should also be rewritten as well.  In summary output and other venues in those rewritten utilities, I have tried to respect the specified scale/precision of the dimension if it was set in the header.
> 
> Rewriting las2txt similarly to lasinfo and las2las is in my queue, but I probably won't get to it for a bit.
> 
> Howard
> 
> PS, this question should be asked on the list, and I have forwarded it there._______________________________________________
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