[pdal] PDAL 1.8.0: filters.smrf: No returns to process.

[Robert Dzur]

Hi List,


I've be running into some trouble getting filters.smrf to run on a LAS file on pdal 1.8.0 (OS X brew install).


Running the following command:


pdal pipeline denoise_classify_sample9_1ft.json \

--readers.las.filename=Day_5/TrackZ_S_20181014_183948_Profiler.zfs_7.las \

--writers.las.filename=ALL_LAS/Day_5/TrackZ_S_20181014_183948_Profiler.zfs_7_smrf_9.las


fails to write a point cloud and reports the following:


PDAL: filters.smrf: No returns to process.


I have run this same command on another machine that has pdal 1.7.2 (OS X brew install) which successfully completes and writes the resulting point cloud as expected.


I'm wondering if anyone may have any pointers regarding how I might get filters.smrf to run in 1.8.0. on these data.  Incidentally, I have been able to successfully apply the same json file to airborne las data in 1.8.0.  I'm somewhat confused about what might be the issue with the point cloud file in 1.8 where it fails versus 1.7.2 where the file processes correctly.


Contents of the json file follow:


{
"pipeline": [
{
"type" : "readers.las",
"filename" : "file.las"
},
{
"type":"filters.assign",
"assignment" : "Classification[0:20]=0"
},
{
"type": "filters.outlier",
"method": "statistical",
"multiplier":4,
"mean_k": 12
},
{
"type":"filters.smrf",
"cell":1.00,
"scalar":0.0,
"slope":0.06,
"threshold":1.05,
"window":49.0,
"cut":0.0
},
{
"type": "writers.las",
"compression": "false",
"a_srs": "EPSG:6531+6360",
"minor_version": "2",
"forward": "all",
"filename":"outfile.las"
}
]
}


Thanks for any assistance in this matter.


Best

--

Rob Dzur

rdzur at bhinc.com


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