[pgpointcloud] Howto read/convert PTS or PTX formats?

[Stefan Keller]

Hi,

Martin wrote:
> What do you mean with laszip supporting pointcloud?

I meant writing adding driver which writes to PostgreSQL/pointcloud for
laszip - like there exists such a "pointcloud writer" for PDAL:
http://www.pointcloud.org/pipeline/drivers.pgpointcloud.writer.html

> adding PTX to PDAL would be the easiest.

So, since you confirmed this, I'll stick with PDAL and try to preprocess
the PTX->LAS without programming.

Yours, Stefan


2013/10/12 Martin Isenburg <martin.isenburg at gmail.com>

> Hello,
>
> adding PTX to PDAL would be the easiest. It is a pretty
> straight-forward variation on an simple xyziRGB ASCII format with a
> small header. What do you mean with laszip supporting pointcloud?
>
> Martin
>
> On Sat, Oct 12, 2013 at 9:13 AM, Stefan Keller <sfkeller at gmail.com> wrote:
> >> What I'm still wishing is that laszip would support pointcloud - or that
> >> PDAL would support .PTX...:-)
> >
> > ... in other words: What would be more straight forward to implement (for
> > me/us)?
> >
> > -S.
> >
> >
> > 2013/10/11 Stefan Keller <sfkeller at gmail.com>
> >>
> >> Hi Martin
> >>
> >> I did not realize that pointzip is based on laszip since pointzip
> mentions
> >> only that it "(... uses the LASzip compression algorithm)".
> >> And I did not find a documentation that mentions that laszip supports
> PTX.
> >> I'm actually very comfortable with laszip being a command line tool.
> >> What I'm still wishing is that laszip would support pointcloud - or
> thatt
> >> PDAL would support .PTX...:-)
> >>
> >> Yours, Stefan
> >>
> >>
> >>
> >>
> >>
> >> 2013/10/11 Martin Isenburg <martin.isenburg at gmail.com>
> >>>
> >>> Hello.
> >>>
> >>> you can use the pointzip.exe tool, but that is mainly meant to "take
> >>> the edge off" as it has been my experience that the terrestrial
> >>> scanner folks are very GUI centric and these folks seem reluctant to
> >>> enter the command-line world.
> >>>
> >>> instead of using pointzip.exe through the GUI you can also use
> >>>
> >>> laszip -i in.pts -ipts -o out.laz
> >>>
> >>> or
> >>>
> >>> laszip -i in.ptx -iptx -o out.laz
> >>>
> >>> and the extra PTS or PTX information will be stored in an additional
> >>> VLR record so it could be recovered if needed (for the PTX it is
> >>> likely needed if there are any values in the translation or rotation
> >>> matrices)
> >>>
> >>> Is pointzip.exe being used much in the terrestrial world? I got a lot
> >>> of feedback after release but it has died down since.
> >>>
> >>> Martin
> >>>
> >>> PS: The web-site http://pointzip.org is really meant to house the
> >>> "generic" compressor someday and I am still waiting vor Dave (USACE)
> >>> or Paul (Elephant) to get back to me on that.
> >>>
> >>> On Fri, Oct 11, 2013 at 2:36 AM, Stefan Keller <sfkeller at gmail.com>
> >>> wrote:
> >>> > Hi Howard (and hello to Mateusz too)
> >>> >
> >>> > Thanks for your replies. I'm new to converting LIDAR data (I'm rather
> >>> > used
> >>> > to vector and raster conversion) but I thought I'm not the first one
> to
> >>> > process FARO Focus3d data.
> >>> >
> >>> > So my hope relies on a PTX->LAS conversion using Martin's pointzip
> >>> > before
> >>> > importing LAS->PostgreSQL/PostGIS/pointcloud).
> >>> >
> >>> > Or do you suggest to go back to the FARO device/software (which I
> don't
> >>> > have
> >>> > right now) and export to another format, which can be read then
> >>> > directly
> >>> > into PostgreSQL by PDAL (or another tool)?
> >>> >
> >>> > Yours, Stefan
> >>> > (Maintainer of http://geoconverter.hsr.ch)
> >>> >
> >>> >
> >>> > 2013/10/10 Howard Butler <howard at hobu.co>
> >>> >>
> >>> >>
> >>> >> On Oct 9, 2013, at 5:22 PM, Stefan Keller <sfkeller at gmail.com>
> wrote:
> >>> >>
> >>> >> > Hi,
> >>> >> >
> >>> >> > I got data from a FARO Focus3d LIDAR scanner I think in PTS or PTX
> >>> >> > format.
> >>> >> > Does anybody have experiences in reading these formats - or at
> least
> >>> >> > converting them to LAS?
> >>> >> > I found pointzip [1] but I'd like to use PDAL since my target is
> >>> >> > PostgreSQL (pointcloud extension) and PDAL supports writing to
> this
> >>> >> > database.
> >>> >> >
> >>> >> > Yours, Stefan
> >>> >> >
> >>> >> > [1] http://www.cs.unc.edu/~isenburg/pointzip/
> >>> >>
> >>> >> PDAL doesn't support PTS or PTX at this time. The FARO folks would
> >>> >> most
> >>> >> likely need to provide either a binary API so that a PDAL driver
> could
> >>> >> be
> >>> >> written for their format(s), or alternatively, some sort of
> >>> >> document(s)
> >>> >> describing the binary layout of the formats so that a driver could
> be
> >>> >> written.
> >>> >>
> >>> >> Sorry I can't be of more help.
> >>> >>
> >>> >> Howard
> >>> >>
> >>> >>
> >>> >
> >>
> >>
> >
>
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