[pdal] readers.pgpointcloud

[Andrew Bell]

This was a bug that I believe has been fixed.  Either use the release
version (1.3) or update to the latest contents of the master branch.

On Thu, Dec 8, 2016 at 9:42 AM, Mike Skaug <mike.skaug at nsidc.org> wrote:

> I'm working on a project where we are using pdal to ingest lidar data into
> a pgpointcloud enabled PostgreSQL database and then reading the data out
> into another format. At least that's the idea.
>
> We set up a simple pipeline to write the data into the database:
> {
>     "pipeline":[
> "/data/ILATM1B.002/2013.03.20/ILATM1B_20130320_141441.ATM4BT4.h5",
>         {
>             "type": "filters.chipper",
>             "capacity": 500
>         },
>         {
>             "type":"writers.pgpointcloud",
>             "connection":"host='valkyrie-db' dbname='valkyrie'
> user='valkyrie' password='valkyrie'",
>             "table":"patches"
>         }
>     ]
> }
>
> This reads a single file, chips it and writes it into the database. This
> works as expected.
>
> However, this pipeline taken almost verbatim from the example:
> http://www.pdal.io/stages/readers.pgpointcloud.html, which is intended to
> read the data out of the database, fails:
>
> {
>     "pipeline":[
>         {
>             "type":"readers.pgpointcloud",
>             "connection":"host='valkyrie-db' dbname='valkyrie'
> user='valkyrie' password='valkyrie'",
>             "table":"patches",
>             "column":"pa",
>             "where":"PC_Explode(PC_Intersection(pa,
> 'SRID=4326;POLYGON((-160.000 80.000, -20.000 80.00, -20.000 85.000,
> -160.000 85.000, -160.000 80.000))'::geometry))"
>         },
>         {
>           "type":"writers.text",
>           "filename":"output.txt"
>         }
>     ]
> }
>
> The error is `PDAL: JSON pipeline: Can't find file ' ' to open with
> 'readers.pgpointcloud'.`
>
> This seems to suggest that pdal is looking for an input file? Or might I
> get this error if it is not connecting to the database? (I assume that the
> database connection is fine because it is using the same `connection`
> option as the successful "writers.pgpointcloud" given above.)
>
> Thanks for any suggestions.
> --Mike
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-- 
Andrew Bell
andrew.bell.ia at gmail.com
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