Re: Comments regarding laszip_2.2.0-1_amd64.changes

[Sebastiaan Couwenberg]

On 03/17/2018 05:32 PM, Martin Landa wrote:
> Hi,
> 
> 2018-03-17 17:25 GMT+01:00 Sebastiaan Couwenberg :
>> On 03/17/2018 05:21 PM, Sebastiaan Couwenberg wrote:
>>> Don't upload laszip to UbuntuGIS or any other PPA, due to the FastAC
>>> code not allowing modification the laszip package is unredistributable
>>> because it violets the terms of the LGPL.
>>
>> I see that you uploaded it to ubuntugis-experimental already, so I
>> deleted that package since we're not allowed to distribute the package
>> in it current form.
> 
> sorry, I didn't know about that. Thanks for pointing this out!

For some more background, see:

 https://trac.osgeo.org/osgeolive/ticket/1341

>>> If you want to support LAZ in PDAL for GRASS getting laz-perf packages
>>> is a much better option:
> 
> GRASS still relies on liblas. There are new GRASS modules based on
> PGAL, but not really finished.

libLAS is not actively developed any more, it's highly unlike to ever
see another release.

PDAL is the way forward for LAS support in OSGeo project. And thanks for
Howard, there is now an alternative to LASzip which doesn't have license
issues.

The LASzip saga has been a very disappointing experience, Martin talks
big about how LAZ is better dan ESRI's format, but did do any work to
resolve the license issues in LASzip which was the only open source
implementation.

I know that the PDAL support in GRASS is still in the early stages, I've
never been able to successfully build the grass Debian package with PDAL
support. I'd love to be able to do that, though, and not have to disable
it when PDAL publishes a new release (as it took quite a while for GRASS
to support PDAL 1.6.0).

Kind Regards,

Bas


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Re: Comments regarding laszip_2.2.0-1_amd64.changes

[Martin Landa]

Hi,

2018-03-17 17:25 GMT+01:00 Sebastiaan Couwenberg :
> On 03/17/2018 05:21 PM, Sebastiaan Couwenberg wrote:
>> Don't upload laszip to UbuntuGIS or any other PPA, due to the FastAC
>> code not allowing modification the laszip package is unredistributable
>> because it violets the terms of the LGPL.
>
> I see that you uploaded it to ubuntugis-experimental already, so I
> deleted that package since we're not allowed to distribute the package
> in it current form.

sorry, I didn't know about that. Thanks for pointing this out!

>> If you want to support LAZ in PDAL for GRASS getting laz-perf packages
>> is a much better option:

GRASS still relies on liblas. There are new GRASS modules based on
PGAL, but not really finished.

Martin

-- 
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http://geo.fsv.cvut.cz/gwiki/Landa
http://gismentors.cz/mentors/landa

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Re: Comments regarding laszip_2.2.0-1_amd64.changes

[Sebastiaan Couwenberg]

On 03/17/2018 05:21 PM, Sebastiaan Couwenberg wrote:
> Don't upload laszip to UbuntuGIS or any other PPA, due to the FastAC
> code not allowing modification the laszip package is unredistributable
> because it violets the terms of the LGPL.

I see that you uploaded it to ubuntugis-experimental already, so I
deleted that package since we're not allowed to distribute the package
in it current form.

> If you want to support LAZ in PDAL for GRASS getting laz-perf packages
> is a much better option:
> 
>  https://github.com/hobu/laz-perf/
> 
> On 08/21/2014 10:17 PM, Thorsten Alteholz wrote:
>> some files contain the following remark:
>>   // Permission to copy and redistribute this code is hereby granted, 
>> provided -
>>   // that this warning and copyright notices are not removed or altered. 
>>   -
>>
>> This does not allow modification. Can you please explain why this code can 
>> be 
>> licensed under LGPL?

Kind Regards,

Bas

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Re: Comments regarding laszip_2.2.0-1_amd64.changes

[Sebastiaan Couwenberg]

Hi Martin,

Don't upload laszip to UbuntuGIS or any other PPA, due to the FastAC
code not allowing modification the laszip package is unredistributable
because it violets the terms of the LGPL.

If you want to support LAZ in PDAL for GRASS getting laz-perf packages
is a much better option:

 https://github.com/hobu/laz-perf/

On 08/21/2014 10:17 PM, Thorsten Alteholz wrote:
> some files contain the following remark:
>   // Permission to copy and redistribute this code is hereby granted, 
> provided -
>   // that this warning and copyright notices are not removed or altered.  
>  -
> 
> This does not allow modification. Can you please explain why this code can be 
> licensed under LGPL?

Kind Regards,

Bas

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Re: Comments regarding laszip_2.2.0-1_amd64.changes

[Sebastiaan Couwenberg]

I've been in contact with the FastAC authors, and Amir Said has replied
indicating that they would like their code to be used in Free Software
projects:

On 08/22/2014 01:51 AM, Amir Said wrote:
 Hi,

 Our main objective was to avoid people modifying the code,
 redistributing it, and we receiving complaints that our code wasn't
 working...

 I'll be glad to see it used in Free Software projects..., and a link
 to our book


http://www.cambridge.org/us/academic/subjects/engineering/communications-and-signal-processing/digital-signal-compression-principles-and-practice

 would be nice, but not essential ;-)

 What do we need to do?

 Amir

I've recommended that they publish updated FastAC code in which the
license is changed to the 2-clause BSD license which is closest to the
current license. Or the BSD-3-Clause or its Clear variant, for broadest
compatibility for use in Free Software projects. And explained that
using GPL2+ would prevent the use in BSD licensed projects.

I think it's safe to reject the laszip package in its current form. And
I'll work with the FastAC and LASzip developers to get the relicensed
FastAC code included in a new LASzip release which I'll then resubmit
for ftp-master review in the NEW queue.

Kind Regards,

Bas

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Comments regarding laszip_2.2.0-1_amd64.changes

[Thorsten Alteholz]

Dear Maintainer,

some files contain the following remark:
  // Permission to copy and redistribute this code is hereby granted, provided -
  // that this warning and copyright notices are not removed or altered.   -

This does not allow modification. Can you please explain why this code can be 
licensed under LGPL?

Thanks!
 Thorsten



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Re: Comments regarding laszip_2.2.0-1_amd64.changes

[Sebastiaan Couwenberg]

On 08/21/2014 10:17 PM, Thorsten Alteholz wrote:
 Dear Maintainer,
 
 some files contain the following remark:
   // Permission to copy and redistribute this code is hereby granted, 
 provided -
   // that this warning and copyright notices are not removed or altered.  
  -
 
 This does not allow modification. Can you please explain why this code can be 
 licensed under LGPL?

Good catch. I assume this was an oversight from the upstream developers.
The FastAC header was added after the code was included in LASzip maybe
because they were unaware of these limitations before.

https://github.com/LASzip/LASzip/commit/479718f4290aef0a20eece545657e5ae38feba1c

I can theorize that the the LASzip developers thought that because the
LGPL intents to exercise the right to control the distribution of
derivative or collective works based on the Library, and not to claim
rights or contest your rights to work written entirely by you, that
including the FastAC code complies with the license.

 Thanks!
  Thorsten

Kind Regards,

Bas

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