[pdal] Offset, rotate and convert a las dataset

[Rudy Stricklan]

Andrew, that does indeed get me on the right path. I'll post a summary of
my workflow when I have it working, if that is appropriate for this group.

Rudy Stricklan

On Fri, Jul 30, 2021 at 7:51 AM Andrew Bell <andrew.bell.ia at gmail.com>
wrote:

> Hi Rudy,
>
> You should look at https://pdal.io/stages/filters.transformation.html. I
> think you'd usually do a translation to the origin you desire, followed by
> a rotation, followed by the inverse translation -- you can chain three
> transformation filters to do this.
>
> On Fri, Jul 30, 2021 at 2:00 AM Rudy Stricklan <
> rudy.stricklan at mappingautomation.com> wrote:
>
>> I realize this is probably a big ask, but any advice would be welcome. I
>> have a .las dataset ('driveway.las') that was produced by a Livox
>> solid-state LiDAR sensor <https://www.livoxtech.com/mid-40-and-mid-100>.
>> The relevant portion of the lasinfo command:
>>
>> Header Summary
>> ---------------------------------------------------------
>>   Version:                     1.2
>>   Number of Point Records:     2049000
>>   Compressed:                  False
>>   Number of Points by Return:  0 0 0 0 0
>>   Scale Factor X Y Z:          0.00100000000000 0.00100000000000
>> 0.00100000000000
>>   Offset X Y Z:                0.000 0.000 0.000
>>   Min X Y Z:                   0.000 -28410.000 -2096.000
>>   Max X Y Z:                   114446.000 15231.000 30371.000
>>   Spatial Reference:           None
>>
>> The Livox sensor was pointing west, so what I'd like to do is
>> rotate/offset the las 90 degrees clockwise around a 0,0,0 point of
>> -12472675,3936612,1402 (EPSG:3857), and finally assign the EPSG:3857
>> coordinate reference system to the transformed las. Then as a final step, I
>> want to convert the transformed las to an ept dataset.
>>
>> Ideally, I'd like to be provided with the PDAL pipeline json that would
>> do all this. Understanding that this is a downright lazy request, perhaps
>> someone could outline the pipeline steps that would perform my
>> transformation/conversion for me to start from.
>>
>> Many thanks to any responders.
>>
>> Rudy Stricklan
>> --
>>
>> Rudy Stricklan, ME, RPLS, GISP
>> Mapping Automation, LLC
>> 602.317.0130
>> www.mappingautomation.com
>> _______________________________________________
>> pdal mailing list
>> pdal at lists.osgeo.org
>> https://lists.osgeo.org/mailman/listinfo/pdal
>>
>
>
> --
> Andrew Bell
> andrew.bell.ia at gmail.com
>


-- 

Rudy Stricklan, ME, RPLS, GISP
Mapping Automation, LLC
602.317.0130
www.mappingautomation.com
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