[Liblas-devel] lasinfo and las2las replacements

[Wes Toews]

Have the build prerequisites changed at all (needing boost, etc)?

On 12 October 2010 10:52, Mark Seibel <mseibel at gmail.com> wrote:

> Really great to hear! I rely on these tools for all my lidar
> processing.  Glad to see the old ones kept for previous scripts
> written, but so great to hear about the improvements to the new code!
>
> Great work, and cant wait to try!
>
> Mark
>
> On Tue, Oct 12, 2010 at 1:23 PM, Howard Butler <hobu.inc at gmail.com> wrote:
> > All,
> >
> > As part of the buildup to the next release (crossing my fingers for a
> source release tonight if I can get the last bits done), I have completely
> reimplemented lasinfo and las2las.  I have preserved the old versions in the
> form of lasinfo-old and las2las-old in case people had processes that were
> using these utilities.  The new versions are at least twice as fast as
> previous libLAS variants of Martin's tools, and 30x more expressive,
> especially in the form of filtering and transforming data.  The filters that
> are available to las2las are also available to lasinfo, and use can use
> these advanced filters to summarize data.
> >
> > Here's a short summary of some of the updates for lasinfo:
> >
> > - lasinfo now supports optionally outputting an XML representation of the
> summary to stdout
> > - lasinfo outputs more information about the point format layout in the
> form of "schema" information
> > - lasinfo supports numerous attribute filters
> >
> > <http://liblas.org/utilities/lasinfo.html> contains a help dump, and I
> expect to update this with more detailed help in the near future.
> >
> > <http://liblas.org/utilities/las2las.html> contains a help file for the
> new las2las, which should give you a feel for what's available.  You should
> find things much more expressive and powerful  Options including splitting
> files by # of megabytes or points, expressive filters, and numerous header
> value assignments and transformations
> >
> > The downside is that the argument names have been changed a bit, and you
> may have to learn some new syntax.  The speed improvement, especially for
> las2las, should give you incentive to change, however :)
> >
> > Howard
> >
> >
> >> fire:data hobu$ time las2las-old TO_core_last_zoom.las foo.las
> >> Creating another reader...
> >>   Reparing Point Count by Return...
> >>
> >> real  0m8.473s
> >> user  0m8.329s
> >> sys   0m0.117s
> >> fire:data hobu$ time las2las TO_core_last_zoom.las output.las
> >>
> >> real  0m3.244s
> >> user  0m3.139s
> >> sys   0m0.085s
> >
> >
> >
> > _______________________________________________
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> > Liblas-devel at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/liblas-devel
> >
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