Hi John,
I confirm that it works after indexing the SPD file.
Thanks a lot!
Regards,
Kevin
On 6 February 2015 at 10:02, John Armston <[email protected]>
wrote:
> Hi Kevin,
>
>
>
> I was able to run your code and convert the file to LAS with:
>
> spdtranslate --if SPD --of LAS -i lidar.spd -o lidar.las
>
>
>
> You need to index your SPD before loading it up in SPDPointsViewer, for
> example:
>
> spdtranslate --if SPD --of SPD -x FIRST_RETURN -i lidar.spd -o
> lidar_seqind.spd
>
>
>
> cheers,
>
> John
>
>
>
> *From:* Kevin Theuma [mailto:[email protected]]
> *Sent:* Thursday, 5 February 2015 6:47 PM
> *To:* Daniel Clewley
> *Cc:* spdlib-develop
> *Subject:* Re: [spdlib-develop] Create new SPD file from python
>
>
>
> Hi Daniel,
>
> Thank you for your help.
>
> I managed to solve the problem by setting some header values.
>
> My new code is as follows...
>
> import spdpy
> spdFileOut = spdpy.createSPDFile("lidar.
>
> spd")
> spdWriter = spdpy.SPDPyNoIdxWriter()
> spdWriter.open(spdFileOut, "lidar.spd")
> spdFileOut.setReceiveWaveformDefined(0) # Define contents this lidar
> dataset
> spdFileOut.setTransWaveformDefined(0) # Define contents this lidar
> dataset
> spdFileOut.setDecomposedPtDefined(0) # Define contents this lidar
> dataset
> spdFileOut.setDiscretePtDefined(1) # Define contents this lidar
> dataset
> spdFileOut.setOriginDefined(0) # Define contents this lidar
> dataset
> point1 = spdpy.createSPDPointPy()
> point1.amplitudeReturn = 255
> point1.x = 10
> point1.y = 10
> point1.z = 10
> point2 = spdpy.createSPDPointPy()
> point2.amplitudeReturn = 255
> point2.x = 20
> point2.y = 20
> point2.z = 20
> point3 = spdpy.createSPDPointPy()
> point3.amplitudeReturn = 255
> point3.x = 30
> point3.y = 30
> point3.z = 30
> point4 = spdpy.createSPDPointPy()
> point4.amplitudeReturn = 255
> point4.x = 40
> point4.y = 40
> point4.z = 40
> pulse = spdpy.createSPDPulsePy()
> pulse.pts = [point1,point2,point3,point4]
> pulse.numberOfReturns = 4
> spdWriter.writeData([pulse])
> spdWriter.close(spdFileOut)
> spdpy.printSPDFile("lidar.spd")
>
>
>
> However now I am getting a "Segmentation fault" error when trying to
> convert the SPD file to LAS and the SPDPointsViewer is not showing the
> points.
>
> Regards,
> Kevin
>
>
>
> On 4 February 2015 at 21:42, Daniel Clewley <[email protected]>
> wrote:
>
> Hi Kevin,
>
> Have you tried running spdinfo on the file (to check SPDLib can read it).
> I ran your code and the file read OK, I think the problem is just writing
> out to a LAS 1.2 file.
>
> If you haven’t seen them already there are some examples of creating an
> SPD file using the Python bindings with the SPDLib source under
> python/importers
>
> Thanks,
>
> Dan
>
>
>
> > On 4 Feb 2015, at 16:16, Kevin Theuma <[email protected]> wrote:
> >
> > Hi,
> >
> > I am creating a new SPD file from python but the output file is not
> being recognised as a points file.
> >
> > My code is as follows...
> >
> > import spdpy
> > spdFileOut = spdpy.createSPDFile("lidar.spd")
> > spdWriter = spdpy.SPDPyNoIdxWriter()
> > spdWriter.open(spdFileOut, "lidar.spd")
> > point1 = spdpy.createSPDPointPy()
> > point1.amplitudeReturn = 255
> > point1.x = 10
> > point1.y = 10
> > point1.z = 10
> > point2 = spdpy.createSPDPointPy()
> > point2.amplitudeReturn = 255
> > point2.x = 20
> > point2.y = 20
> > point2.z = 20
> > point3 = spdpy.createSPDPointPy()
> > point3.amplitudeReturn = 255
> > point3.x = 30
> > point3.y = 30
> > point3.z = 30
> > point4 = spdpy.createSPDPointPy()
> > point4.amplitudeReturn = 255
> > point4.x = 40
> > point4.y = 40
> > point4.z = 40
> > pulse = spdpy.createSPDPulsePy()
> > pulse.pts = [point1,point2,point3,point4]
> > pulse.numberOfReturns = 4
> > spdWriter.writeData([pulse])
> > spdWriter.close(spdFileOut)
> > spdpy.printSPDFile("lidar.spd")
> >
> > Whenever I try to convert the output SPD file to LAS spdtranslate gives
> me this error:
> > Error: This writer can only export point data.
> >
> > Is there something else I have to do to get it to work?
> >
> > Regards
>
> >
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>
>
> --
>
>
>
> *Kevin Theuma*
>
> B.Eng. (Hons)(Melit.)
>
> Research Support Officer
>
>
>
> Room 318
>
> Department of Electronic Systems Engineering
>
> Faculty of Engineering
>
> University of Malta, Msida MSD 2080, Malta
>
> Tel: (+356) 2340 3905
>
> E-mail: [email protected]
> This E-Mail is intended only for the addressee. Its use is limited to
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>
--
*Kevin Theuma*
B.Eng. (Hons)(Melit.)
Research Support Officer
Room 318
Department of Electronic Systems Engineering
Faculty of Engineering
University of Malta, Msida MSD 2080, Malta
Tel: (+356) 2340 3905
E-mail: [email protected]
------------------------------------------------------------------------------
Dive into the World of Parallel Programming. The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot Media, is your
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/
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