[pdal] Took long time to generate Geo-tiff file after Update to Pdal 2.1.0

[Peter Lim]

Thanks Andrew for your advice!

 

When I run on another laz file, I have the following message:

 

proj_create_from_database: datum not found

proj_create_from_database: ellipsoid not found

proj_create_from_database: prime meridian not found

proj_create_from_database: datum not found

proj_create_from_database: ellipsoid not found

proj_create_from_database: prime meridian not found

PDAL: readers.las: reading point 50000 of 176406445 total points 

 

and Pdal stops.

 

No tif file is generated.  May I know what is the issue…

 

Thank you.

 

Best Regards,

 

Peter Lim

GPS Lands (S) Pte Ltd

 

From: Andrew Bell [mailto:andrew.bell.ia at gmail.com] 
Sent: Wednesday, 30 December 2020 11:03 pm
To: Peter Lim
Cc: pdal
Subject: Re: [pdal] Took long time to generate Geo-tiff file after Update to Pdal 2.1.0

 

I don't see any changes of note between 2.0 and 2.1. You should run some sort of a profiler or debugger in order to determine the root cause of the change.  Note that you may get better performance by providing the bounds of the output raster.

 

On Tue, Dec 29, 2020 at 11:15 PM Peter Lim <peter.lim at gpslands.com> wrote:

Hi,

 

I’ve recently updated the Pdal version to 2.1.0 (git_version: Release).  

 

It took about 40 hours to generate a geo-tiff file from a laz file with 23 million points 

using 64GB Ram and the following json commands:

[

    {

        "type":"readers.las",

        "filename":"somefile.laz"

    },

 

                                {

                                                "type":"writers.gdal",

                                                "resolution": 0.03,

                                                "data_type":"uint16",

                                                "output_type":"mean",

                                                "dimension":"Intensity",

                                                "gdalopts":"COMPRESS=DEFLATE,ZLEVEL=9,NUM_THREADS=ALL_CPUS",            

                                                "filename":"somefile.tif"             

                                                

                                }                              

]

 

Before the Pdal update, it used to take about 3 – 5 hours only

 

Any idea why was it taken such long time.

 

 

Thank you.

 

Best Regards,

 

Peter Lim

 

 


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