<div dir="ltr"><div><div><div><div><div><div>PDAL team -<br><br>I mentioned this in an earlier email but thought it would be better in its own thread. I wrote a pipeline to assign two SMRF variables (window and slope) to separate dimensions, as I eventually want to combine them into a single Postgres database and compare the effectiveness of each iteration.<br><br></div>My pipeline has several stages, as shown below. First I read the file, capturing the non-standard dimensions I created earlier, then I ferry the two new fields. Next reset the classifications (before running SMRF) and assign per-file values to Window and Slope. This is where the process breaks down. Only the last assignment is made. In the pipeline below, I added GpsTime and Red for testing purposes. As shown in the <b>info --stats</b> output (bottom, highlighted text), no changes were made to Window, Slope or GpsTime, but Red is assigned a value of 255. When I remove the Red assignment, GpsTime is assigned the correct value of 3000, but Window and Slope are still unchanged.<br><br></div>If I insert more <b>filters.assign</b> stages in the pipeline, I can set values multiple dimensions, but only if they are the last listed in each stage.<br><br></div><u><b>However, I can't set the values of Window and Slope</b></u> - even if they are last. (I don't care about the others - they are just for testing.) Why can't I assign values to my newly created dimensions? Is it because I don't specify their type until the writer stage?<br><br></div>Thanks in advance.<br><br></div>Regards,<br></div>Eric<br><div><div><div><div><div><div><div><div><div><div><div><b><br><br></b></div><div><font size="4"><u><b>Pipeline (limited to the first 100,000 points for testing). File is LAZ 1.4 format:</b></u></font><br></div><div><br><span style="font-family:monospace,monospace">{<br>  "pipeline":<br>  [<br>    {<br>      "filename":"C:/data/forest_park/forest_park_orig_dtm.laz",<br>      "type":"readers.las",<br>      "extra_dims":"OldClassification=uint8, DTM=float",<br>      "count":100000<br>    },<br>    {<br>      "type":"filters.ferry",<br>      "tag":"filtersferry",<br>      "dimensions":"=>Window, =>Slope"<br>    },<br>    {<br>      "inputs":"filtersferry",<br>      "type":"filters.assign",<br>      "tag":"filtersassign",<br><span style="background-color:rgb(255,255,0)">      "assignment":"Classification[:]=0",<br>      "assignment":"Window[:]=12",<br>      "assignment":"Slope[:]=0_50",<br>      "assignment":"GpsTime[:]=3000",<br>      "assignment":"Red[:]=255"</span><br>    },<br>    {<br>      "inputs":"filtersassign",<br>      "type":"filters.smrf",<br>      "tag":"filterssmurf",<br>      "cell":1.00,<br>      "cut":0,<br>      "scalar":1.25,<br>      "slope":0.05,<br>      "threshold":0.50,<br>      "window":12<br>    },<br>    {<br>        "inputs":"filterssmurf",<br>      "type":"writers.las",<br>      "minor_version":"4",<br>      "compression":"true",<br>      "extra_dims":"OldClassification=uint8, DTM=float, Window=uint8, Slope=float",<br>      "scale_x":"0.01",<br>      "scale_y":"0.01",<br>      "scale_z":"0.01",<br>      "offset_x":"auto",<br>      "offset_y":"auto",<br>      "offset_z":"auto",<br>      "filename":"C:/data/forest_park/smrf/forest_park (window-12, slope-0_05).laz"<br>    }<br>  ]<br>}<br><br></span></div><div><font size="4"><span style="font-family:arial,helvetica,sans-serif"><u><b>info -stats JSON output:</b></u></span></font><span style="font-family:monospace,monospace"><br><br>{<br>  "filename": "C:\\data\\forest_park\\smrf\\forest_park (window-12, slope-0_05).laz",<br>  "pdal_version": "1.7.1 (git-version: Release)",<br>  "stats":<br>  {<br>    "bbox":<br>    {<br>      "EPSG:4326":<br>      {<br>        "bbox":<br>        {<br>          "maxx": -90.26228629,<br>          "maxy": 38.63885582,<br>          "maxz": 231.3,<br>          "minx": -90.26674834,<br>          "miny": 38.63740345,<br>          "minz": 146.26<br>        },<br>        "boundary": {<br>   "coordinates" : [<br>      [<br>         [ -90.266748340000007, 38.637506649999999 ],<br>         [ -90.266697059999998, 38.638855820000003 ],<br>         [ -90.262286290000006, 38.638752609999997 ],<br>         [ -90.262337650000006, 38.637403450000001 ],<br>         [ -90.266748340000007, 38.637506649999999 ]<br>      ]<br>   ],<br>   "type" : "Polygon"<br>}<br><br>      },<br>      "native":<br>      {<br>        "bbox":<br>        {<br>          "maxx": 738284.32,<br>          "maxy": 4280246,<br>          "maxz": 231.3,<br>          "minx": 737900.01,<br>          "miny": 4280096.12,<br>          "minz": 146.26<br>        },<br>        "boundary": {<br>   "coordinates" : [<br>      [<br>         [ 737900.01000000001, 4280096.1200000001 ],<br>         [ 737900.01000000001, 4280246 ],<br>         [ 738284.31999999995, 4280246 ],<br>         [ 738284.31999999995, 4280096.1200000001 ],<br>         [ 737900.01000000001, 4280096.1200000001 ]<br>      ]<br>   ],<br>   "type" :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,<br>        "maximum": 172254002.3,<br>        "minimum": 172253999.8,<br>        <b>"name": "GpsTime",</b><br>        "position": 15,<br>        "skewness": 5.833372669e+21,<br>        "stddev": 544717.7005,<br>        "variance": 2.967173733e+11</span><br>      },<br>      {<br>        "average": 0,<br>        "count": 100000,<br>        "maximum": 0,<br>        "minimum": 0,<br>        "name": "ScanChannel",<br>        "position": 16,<br>        "stddev": 0,<br>        "variance": 0<br>      },<br>      {<br>        "average": 0,<br>        "count": 100000,<br>        "maximum": 0,<br>        "minimum": 0,<br>        "name": "ClassFlags",<br>        "position": 17,<br>        "stddev": 0,<br>        "variance": 0<br>      },<br>      {<br>        "average": 18.01678,<br>        "count": 100000,<br>        "kurtosis": -1.884682428e+10,<br>        "maximum": 66,<br>        "minimum": 1,<br>        "name": "OldClassification",<br>        "position": 18,<br>        "skewness": 7910529149,<br>        "stddev": 28.56978029,<br>        "variance": 816.2323461<br>      },<br>      {<br>        "average": 153.4204378,<br>        "count": 100000,<br>        "kurtosis": -3.477613714e+20,<br>        "maximum": 156.4029999,<br>        "minimum": 146.477005,<br>        "name": "DTM",<br>        "position": 19,<br>        "skewness": 1.411306933e+20,<br>        "stddev": 1.666234469,<br>        "variance": 2.776337307<br>      },<br>      {<br><span style="background-color:rgb(255,255,0)">        "average": 0,<br>        "count": 100000,<br>        "maximum": 0,<br>        "minimum": 0,<br>        <b>"name": "Window",</b><br>        "position": 20,<br>        "stddev": 0,<br>        "variance": 0</span><br>      },<br>      {<br><span style="background-color:rgb(255,255,0)">        "average": 0,<br>        "count": 100000,<br>        "maximum": 0,<br>        "minimum": 0,<br>        <b>"name": "Slope",</b><br>        "position": 21,<br>        "stddev": 0,<br>        "variance": 0</span><br>      }<br>    ]<br>  }<br>}<br><br></span></div><div><br></div></div></div></div></div></div></div></div></div></div></div></div>