Hi Zhan,
the -x option in spdtranslate is for spatially indexing a pulse in a 2D
Cartesian grid, which requires one location along the path of a laser beam to
index by. This is typically the location of the first or last return (point).
To spatially index by class would not work if none or >1 of the points within a
pulse are of that class.
You can create an image of the mode of point class categories using the
spdmetrics command, or the spdpy2 Python bindings. Examples of using spdpy2 are
in the SPDLib source under ngpython/tests.
cheers,
John.
p.s. Is this DWEL data you’re trying to import? The current schema method for
importing ASCII treats each point as belonging to a separate laser shot – i.e.
pulse information is lost. Is that right Pete? If so best to use the Python
bindings to write a custom importer – we’ve done one for OzDWEL here:
https://bitbucket.org/qdermrsc/tlsrepo/src/9b7f0f94662f/tlsiig_brisbane/converters/dwel/?at=default
From: Zhan Li [mailto:[email protected]]
Sent: Friday, 6 February 2015 4:24 PM
To: Daniel Clewley
Cc: spdlib-develop
Subject: Re: [spdlib-develop] where is the function of hemisherical projection
Hi Dan, Pete,
Thanks a lot for all the helps! I now run the spdtranslate correctly. But may I
suggest one thing about the -x option, index method? As multi-spectral lidar
emerging, we can classify each point potentially. Even with single-wavelength
full-waveform data, we can classify with pulse shape. I think there are some
people like me that need to project a classified points to an image. And
projection of a classified points (the class) needs to use mode of the point
class categories as index. I'd like to have option "MODE" as the index.
Thanks,
Zhan.
On Wed, Feb 4, 2015 at 1:47 PM, Daniel Clewley
<[email protected]<mailto:[email protected]>> wrote:
Hi Zhan,
You need to define a scheme when importing ASCII data using the ‘—schema’ flag.
There are some examples in the schemas folder of the SPDLib source. You can
modify the xyzi.xml one, changing the delimiter to “ “.
Thanks,
Dan
On 4 Feb 2015, at 15:41, Zhan Li
<[email protected]<mailto:[email protected]>> wrote:
Sorry for bugging again... I got segmentation fault error. My ascii file is
formatted as x y z I (they are separated by a space, no header line). Is it
because there might be some funky points in my data? Our point cloud data has
some noise so far we haven't figured out a good way to remove. If helpful for
more info, here is the ASCII file I'm converting to spd.
ftp://earth.bu.edu/zhanli86/hfhd_20140919_c_ascii.txt
thanks,
Zhan.
On Wed, Feb 4, 2015 at 8:57 AM, Pete Bunting
<[email protected]<mailto:[email protected]>> wrote:
HI Zhan,
If you open the SPD file in hdfview then you can save out the quicklook image.
Cheers, Pete
On 4 Feb 2015, at 13:05, Zhan Li
<[email protected]<mailto:[email protected]>> wrote:
Oh oh this is embarrassing that I missed my typo error... Hectic day... But
good to to know the indexing should export to SPD. I was wondering if ASCII to
ASCII could work...
Is there a way to export the quick view image in SPD to a tif or other imag
file? If not I think I'll read the quick view from the SPD and save it?
Thanks
Zhan.
On Wednesday, February 4, 2015, Pete Bunting
<[email protected]<mailto:[email protected]>> wrote:
Hi Zhan,
Going from ascii to ascii won’t do anything in terms of an index. If you want
an indexed file it needs to be an SPD file. So you should have --if ACSII --of
SPD.
Cheers, Pete
On 4 Feb 2015, at 07:30, Daniel Clewley
<[email protected]<mailto:[email protected]>> wrote:
HI Zhan,
I think the problem is you’re only using single dashes for -if and -of it
should be:
—if ASCII —of ASCII
To get the latest version of SPDLib you can check out the development version:
hg clone https://bitbucket.org/petebunting/spdlib
Thanks,
Dan
On 4 Feb 2015, at 01:05, Zhan Li
<[email protected]<mailto:[email protected]>> wrote:
I got error from running spdtranslate in my installed version. Maybe there is a
updated version I need to reinstall?
Thanks,
Zhan.
$ spdtranslate --output
"HFHD_20140919_C_1064_cube_bsfix_pxc_update_atp2_sdfac2_sievefac10_ptcl_points_ascii_hsproj.txt"
--input
"HFHD_20140919_C_1064_cube_bsfix_pxc_update_atp2_sdfac2_sievefac10_ptcl_points_ascii.txt"
-if ASCII -of ASCII --polar -x MAX_INTENSITY
It reports errors in the following.
spdtranslate SPDLib 3.0.0, Copyright (C) 2012 Sorted Pulse Library (SPD)
This program comes with ABSOLUTELY NO WARRANTY. This is free software,
and you are welcome to redistribute it under certain conditions; See
website (http://www.spdlib.org<http://www.spdlib.org/>). Bugs are to be
reported on the trac
or directly to
[email protected]<mailto:[email protected]>
PARSE ERROR: Argument: -i
Couldn't find match for argument
Brief USAGE:
spdtranslate -o <String> -i <String> [-f] [--pulseversion <unsigned
int>] [--pointversion <unsigned int>] [--wavenoise
<float>] [--Oz <float>] [--Oy <double>] [--Ox <double>]
[--defineOrigin] [--tly <double>] [--tlx <double>]
[--defineTL] [--keeptemp] [--convert_proj] [--output_proj
<string>] [--input_proj <string>] [-b <float>] [-c
<unsigned int>] [-r <unsigned int>] [-s <string>] [-t
<string>] [--scan] [--polar] [--spherical] [--wavebitres
<8BIT|16BIT|32BIT>] [-x <FIRST_RETURN|LAST_RETURN
|START_WAVEFORM|END_WAVEFORM|ORIGIN|MAX_INTENSITY
|UNCHANGED>] --of <SPD|UPD|ASCII|LAS> --if <SPD
|ASCIIPULSEROW|ASCII|FWF_DAT|DECOMPOSED_DAT|LAS
|DECOMPOSED_COO|ASCIIMULTILINE> [--] [--version] [-h]
For complete USAGE and HELP type:
spdtranslate --help
On Tue, Feb 3, 2015 at 5:00 AM, Pete Bunting
<[email protected]<mailto:[email protected]>> wrote:
Hi Zhan,
Yes, sorry the website is not very up to date. There is more up to date
documentation on the sourceforge download site:
http://sourceforge.net/projects/spdlib/files/Tutorials/
Regarding the projection issue you want to use polar. The definition is within
the paper attached, see figure 8.
Cheers, Pete
On 2 Feb 2015, at 19:49, Zhan Li
<[email protected]<mailto:[email protected]>> wrote:
Hi Dan,
Thanks for the help. I was checking out the wiki page and it still lists
spd2spd. But I just checked spdtranslate, there is no option for hemispherical
projection. There are "polar", "spherical", and "scan". What is the definition
of polar system here? Does it mean hemispherical projection? I need to feed an
ASCII file of x, y, z and intensity to spdtranslate.
Thanks,
Zhan.
On Mon, Feb 2, 2015 at 2:37 PM, Daniel Clewley
<[email protected]<mailto:[email protected]>> wrote:
Hi Zhan,
In the latest version of SPDLib spd2spd has been replaced with spdtranslate,
you can use this to project data to a hemispherical system using the same flags.
Thanks,
Dan
> On 2 Feb 2015, at 19:28, Zhan Li
> <[email protected]<mailto:[email protected]>> wrote:
>
> Hi I installed spdlib with a "version" label 20130504. I didn't see the
> spd2spd command that can project TLS data to a hemispherical projection. Is
> this version not complete or the projection function is moved to another
> command? Has anyone had the same issue and known how to get the spd2spd back?
>
> Thanks,
>
> Zhan.
>
> --
> Zhan Li, 李展;
> Earth & Environment, Boston University, USA;
>
> 2008 - 2011, in Chinese Academy of Sciences, China;
> 2004 - 2008, in Nanjing University, China;
> ------------------------------------------------------------------------------
> Dive into the World of Parallel Programming. The Go Parallel Website,
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> hub for all things parallel software development, from weekly thought
> leadership blogs to news, videos, case studies, tutorials and more. Take a
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--
Zhan Li, 李展;
Earth & Environment, Boston University, USA;
2008 - 2011, in Chinese Academy of Sciences, China;
2004 - 2008, in Nanjing University, China;
------------------------------------------------------------------------------
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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--
Zhan Li, 李展;
Earth & Environment, Boston University, USA;
2008 - 2011, in Chinese Academy of Sciences, China;
2004 - 2008, in Nanjing University, China;
--
Zhan Li, 李展;
Earth & Environment, Boston University, USA;
2008 - 2011, in Chinese Academy of Sciences, China;
2004 - 2008, in Nanjing University, China;
--
Zhan Li, 李展;
Earth & Environment, Boston University, USA;
2008 - 2011, in Chinese Academy of Sciences, China;
2004 - 2008, in Nanjing University, China;
--
Zhan Li, 李展;
Earth & Environment, Boston University, USA;
2008 - 2011, in Chinese Academy of Sciences, China;
2004 - 2008, in Nanjing University, China;
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look and join the conversation now. http://goparallel.sourceforge.net/
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