[pdal] pgpointcloud writer compression

[Lars]

Thank you Andrew.

________________________________
Fra: Andrew Bell <andrew.bell.ia at gmail.com>
Sendt: fredag 8. juni 2018 22.47
Til: Lars
Kopi: pdal at lists.osgeo.org
Emne: Re: [pdal] pgpointcloud writer compression

I've opened the following ticket to address the issue:

https://github.com/PDAL/PDAL/issues/2050

On Fri, Jun 8, 2018 at 2:01 PM Lars <laasunde at hotmail.com<mailto:laasunde at hotmail.com>> wrote:
Andrew ,

The below is from pgpointcloud documentation and it appears pgpointcloud handles compression stuff. So if PDAL could set lazperf compression type in schema, it might work 😊

"If you are writing your own loading system and want to write into Pointcloud types, create well-known binary inputs, in uncompressed format. If you schema indicates that your patch storage is compressed, Pointcloud will automatically compress your patch before storing it, so you can create patches in uncompressed WKB without worrying about the nuances of particular internal compression schemes."

________________________________
Fra: Andrew Bell <andrew.bell.ia at gmail.com<mailto:andrew.bell.ia at gmail.com>>
Sendt: fredag 8. juni 2018 15.41
Til: Lars
Kopi: pdal at lists.osgeo.org<mailto:pdal at lists.osgeo.org>
Emne: Re: [pdal] pgpointcloud writer compression

Perhaps I misspoke. PDAL does no compression for pgpointcloud.  Perhaps postgres does compression on its own.  We do set "dimensional" or "ght" compression types in the pointcloud schema if they're set as options. We do nothing with lazperf WRT pgpointcloud.

On Fri, Jun 8, 2018 at 6:17 AM, Lars <laasunde at hotmail.com<mailto:laasunde at hotmail.com>> wrote:
Andrew,

Just to make sure I understand this, you are saying that pgpointcloud does not support laz compression?

I am sure you know this but pgpointcloud must be built with LAZPERF enable in order to work.

Do you know if a pgpointcloud ticket has been created for this problem?

kind regards, Lars

________________________________
Fra: Andrew Bell <andrew.bell.ia at gmail.com<mailto:andrew.bell.ia at gmail.com>>
Sendt: torsdag 7. juni 2018 16.22
Til: Lars
Kopi: pdal at lists.osgeo.org<mailto:pdal at lists.osgeo.org>
Emne: Re: [pdal] pgpointcloud writer compression

On Thu, Jun 7, 2018 at 10:08 AM, Lars <laasunde at hotmail.com<mailto:laasunde at hotmail.com>> wrote:
Hello,

Does pdal have any plans to support laz compression for pgpointcloud writer? This compression type is support by PostGIS pgpointcloud extension.

This has been broken from the beginning - there is no compression support at all despite advertising it. I don't know the history. It predates my involvement.

If you'd like to make a pull request with some code, that would be great.

--
Andrew Bell
andrew.bell.ia at gmail.com<mailto:andrew.bell.ia at gmail.com>



--
Andrew Bell
andrew.bell.ia at gmail.com<mailto:andrew.bell.ia at gmail.com>


--
Andrew Bell
andrew.bell.ia at gmail.com<mailto:andrew.bell.ia at gmail.com>
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