[pdal] Extracting specific GpsTime Count from LAS file

[Andrew Bell]

You need to place the "where" clause in quotes.

On Tue, Dec 1, 2020, 10:12 PM Rose Phillips <RPhillips at linz.govt.nz> wrote:

> Hi guys
>
>
>
> I’m struggling to extract the count for a specific GPS time (0.0) in one
> of my LAS files e.g.
>
>
>
> (pdal) C:\Users\rphillips>pdal info --stats
> F:\Raw\NZVD2016\LAS_Tiled\CL2_AT24_2018_1000_1426.las
> --filters.stats.dimensions=GpsTime --filters.stats.count=GpsTime
> --filters.stats.where=(GpsTime == 0)
>
> PDAL: filters.stats: Invalid value '(GpsTime' for argument 'where'.
>
>
>
> (pdal) C:\Users\rphillips>pdal info --stats
> F:\Raw\NZVD2016\LAS_Tiled\CL2_AT24_2018_1000_1426.las
> --filters.stats.dimensions=GpsTime --filters.stats.count=GpsTime
> --filters.stats.where=(GpsTime == 000000000.000000)
>
> PDAL: filters.stats: Invalid value '(GpsTime' for argument 'where'.
>
>
>
> (pdal) C:\Users\rphillips>pdal info --stats
> F:\Raw\NZVD2016\LAS_Tiled\CL2_AT24_2018_1000_1426.las
> --filters.stats.dimensions=GpsTime --filters.stats.count=GpsTime
> --filters.stats.where=(GpsTime == False)
>
> PDAL: filters.stats: Invalid value '(GpsTime' for argument 'where'.
>
>
>
> (pdal) C:\Users\rphillips>pdal info --stats
> F:\Raw\NZVD2016\LAS_Tiled\CL2_AT24_2018_1000_1426.las
> --filters.stats.dimensions=GpsTime --filters.range.limits="GpsTime[0:0]"
> --filters.stats.count=GpsTime
>
> PDAL: Argument references invalid/unused stage: 'filters.range'.
>
>
>
> C:\Users\rphillips>pdal info --stats
> F:\Raw\NZVD2016\LAS_Tiled\CL2_AT24_2018_1000_1426.las
> --filters.range.limits="GpsTime[0:0]" --filters.stats.dimensions=GpsTime
> --filters.stats.count=GpsTime
>
> PDAL: Argument references invalid/unused stage: 'filters.range'.
>
>
>
> (pdal) C:\Users\rphillips>pdal info --stats
> F:\Raw\NZVD2016\LAS_Tiled\CL2_AT24_2018_1000_1426.las
> --filters.range.limits="GpsTime[0.0:0.0]"
> --filters.stats.dimensions=GpsTime --filters.stats.count=GpsTime
>
> PDAL: Argument references invalid/unused stage: 'filters.range'.
>
>
>
> Any chance you could give me pointer where I’ve gone wrong? I know this
> time exists as it shows up in the earliest GPS Time in the Point Data
> Record metadata header.
>
>
>
> I was able to extract all the GPS times using this correct for the same
> file using this command :-
>
>
>
> (pdal) C:\Users\rphillips>pdal info --stats
> F:\Raw\NZVD2016\LAS_Tiled\CL2_AT24_2018_1000_1426.las
> --filters.stats.dimensions=GpsTime --filters.stats.count=GpsTime
>
>
>
> Many thanks and kind regards Rose
>
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