[pdal] las to geotif

[Sergey Yefimov]

It helps. Thank you very much.
________________________________
From: Adam Steer <adam.d.steer at gmail.com>
Sent: Friday, June 7, 2024 7:22 PM
To: Sergey Yefimov <syefimov at ptfs.com>
Cc: pdal at lists.osgeo.org <pdal at lists.osgeo.org>
Subject: Re: [pdal] las to geotif

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Hi Sergey - try reprojecting your source las file into a projected (in metres) system and running again.

PDAL/GDAL pass projections through. Your input data are in degrees, your output resolution is interpreted as the same unit, so resolution 1.0 is interpreted as '1 degree'.

Hope that helps,

Adam

--
Dr Adam Steer
https://spatialised.net<https://spatialised.net/>
Available for consulting/open for headhunting

On Sat, Jun 8, 2024, 07:33 Sergey Yefimov via pdal <pdal at lists.osgeo.org<mailto:pdal at lists.osgeo.org>> wrote:
Hi,
I try to convert las to geotiff using this pipeline

"pipeline":[
      {"type" : "readers.las",
      "filename":"C:\\KVData\\source\\las\\test.las"
      },
      {
            "type":"writers.gdal",
            "filename":"C:/KVData/source/tiff/ttest.tif",
            "resolution":1.0,
            "output_type":"all",
            "gdaldriver":"GTiff"
      }
    ]

After conversion invalid 2 KB tiff file created. las info:

{
  "file_size": 137422487,
  "filename": "C:\\KVData\\source\\las\\test.las",
  "now": "2024-06-07T17:09:19-0400",
  "pdal_version": "2.7.1 (git-version: Release)",
  "reader": "readers.las",
  "stats":
  {
    "bbox":
    {
      "EPSG:4326":
      {
        "bbox":
        {
          "maxx": -75.606374,
          "maxy": 35.9592838,
          "maxz": 29.71,
          "minx": -75.6350255,
          "miny": 35.942234,
          "minz": -11.88
        },
        "boundary": { "type": "Polygon", "coordinates": [ [ [ -75.6350255, 35.942234, -11.88 ], [ -75.6350255, 35.9592838, -11.88 ], [ -75.606374, 35.9592838, 29.71 ], [ -75.606374, 35.942234, 29.71 ], [ -75.6350255, 35.942234, -11.88 ] ] ] }
      }, ..
"statistic":
    [
      {
        "average": -75.62226764,
        "count": 4907929,
        "maximum": -75.606374,
        "minimum": -75.6350255,
        "name": "X",
        "position": 0,
        "stddev": 0.005315505055,
        "variance": 2.825459399e-05
      },
      {
        "average": 35.95136764,
        "count": 4907929,
        "maximum": 35.9592838,
        "minimum": 35.942234,
        "name": "Y",
        "position": 1,
        "stddev": 0.002706953159,
        "variance": 7.327595404e-06
      },..
}






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