[pdal] Extracting specific GpsTime Count from LAS file

[Rose Phillips]

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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