[pdal] Assign classification

[Andrew Bell]

Silvia,

There's been discussion about changing the assignment filter to
automatically create dimensions.  I believe that my reasoning when I
decided against that was that it might create hard-to-find errors due to
misspellings.  In retrospect, it may have been the wrong decision.

On Tue, Apr 30, 2019 at 5:23 AM Silvia Franceschi <
silvia.franceschi at gmail.com> wrote:

> Thanks a lot Luigi!
> I added this to the pipeline:
> {
>           "type": "filters.ferry",
>           "dimensions": "=>Classification"
>    },
> and now it seems to proceed!
>
> Thanks again for the big help!
>
> Silvia
>
>
>
> On Tue, Apr 30, 2019 at 11:10 AM Luigi Pirelli <luipir at gmail.com> wrote:
>
>> use filters.ferry for that
>>
>> https://pdal.io/stages/filters.ferry.html
>>
>> Luigi Pirelli
>>
>>
>> **************************************************************************************************
>> * LinkedIn: https://www.linkedin.com/in/luigipirelli
>> * Stackexchange: http://gis.stackexchange.com/users/19667/luigi-pirelli
>> * GitHub: https://github.com/luipir
>> * Mastering QGIS 2nd Edition:
>> *
>> https://www.packtpub.com/big-data-and-business-intelligence/mastering-qgis-second-edition
>> * Hire me: http://goo.gl/BYRQKg
>>
>> **************************************************************************************************
>>
>>
>> On Tue, 30 Apr 2019 at 10:54, Silvia Franceschi <
>> silvia.franceschi at gmail.com> wrote:
>>
>>> Thanks Luigi,
>>> you are perfectly right... this is a print of the details of first point:
>>> "point":
>>>     {
>>>       "Blue": 155,
>>>       "Green": 153,
>>>       "Intensity": 2497,
>>>       "PointId": 0,
>>>       "Red": 159,
>>>       "X": 63.45360184,
>>>       "Y": 0.0307,
>>>       "Z": 0
>>>     }
>>>
>>> So now I should create the field for the classification, any idea?
>>>
>>> Thanks again!
>>>
>>> Silvia
>>>
>>>
>>>
>>>
>>> On Tue, Apr 30, 2019 at 10:44 AM Luigi Pirelli <luipir at gmail.com> wrote:
>>>
>>>> can you check if Classification dimension is present? strange but seems
>>>> it doesn't
>>>>
>>>> Luigi Pirelli
>>>>
>>>>
>>>> **************************************************************************************************
>>>> * LinkedIn: https://www.linkedin.com/in/luigipirelli
>>>> * Stackexchange: http://gis.stackexchange.com/users/19667/luigi-pirelli
>>>> * GitHub: https://github.com/luipir
>>>> * Mastering QGIS 2nd Edition:
>>>> *
>>>> https://www.packtpub.com/big-data-and-business-intelligence/mastering-qgis-second-edition
>>>> * Hire me: http://goo.gl/BYRQKg
>>>>
>>>> **************************************************************************************************
>>>>
>>>>
>>>> On Tue, 30 Apr 2019 at 09:40, Silvia Franceschi <
>>>> silvia.franceschi at gmail.com> wrote:
>>>>
>>>>> Dear all,
>>>>> I am trying to extract the DTM from a point cloud of a terrestrial
>>>>> LiDAR. Points of the survey are all of one single return and do no have a
>>>>> classification.
>>>>> To go on with the elaborations I guess that I have to assign a
>>>>> classification of the points otherwise the tools (filter.smrf) do not work,
>>>>> is this true?
>>>>> I tried to use the command filters.assign with the following statement
>>>>> in a pipeline (json file).
>>>>>
>>>>> {
>>>>>           "type":"filters.assign",
>>>>>     "assignment":"Classification[:]=0"
>>>>>         },
>>>>>
>>>>> But  got this error:
>>>>> PDAL: filters.assign: Invalid dimension name in 'assignment' option:
>>>>> 'Classification'.
>>>>>
>>>>> Do some of you understand which is the problem?
>>>>>
>>>>> Thanks in advance for your help.
>>>>>
>>>>> Silvia
>>>>>
>>>>>
>>>>> --
>>>>> ing. Silvia Franceschi
>>>>> Via Roma, 64
>>>>> 38030 Castello di Fiemme (TN)
>>>>>
>>>>> tel: 0039 -3384501332
>>>>> _______________________________________________
>>>>> pdal mailing list
>>>>> pdal at lists.osgeo.org
>>>>> https://lists.osgeo.org/mailman/listinfo/pdal
>>>>
>>>>
>>>
>>> --
>>> ing. Silvia Franceschi
>>> Via Roma, 64
>>> 38030 Castello di Fiemme (TN)
>>>
>>> tel: 0039 -3384501332
>>> _______________________________________________
>>> pdal mailing list
>>> pdal at lists.osgeo.org
>>> https://lists.osgeo.org/mailman/listinfo/pdal
>>
>>
>
> --
> ing. Silvia Franceschi
> Via Roma, 64
> 38030 Castello di Fiemme (TN)
>
> tel: 0039 -3384501332
> _______________________________________________
> pdal mailing list
> pdal at lists.osgeo.org
> https://lists.osgeo.org/mailman/listinfo/pdal



-- 
Andrew Bell
andrew.bell.ia at gmail.com
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