Hi Florian,

you can use the custom transformation output strategy for that [1]. There you 
have to add a callback in which you can define the output strategy.

We use qudt for the description of different measures, as well as for the 
transformation. It contains a transformation factor to transform between the 
different units.

Philipp




[1] 
https://streampipes.apache.org/docs/docs/dev-guide-output-strategies/#custom-transform-output
 
<https://streampipes.apache.org/docs/docs/dev-guide-output-strategies/#custom-transform-output>

> On 24. May 2020, at 13:42, Florian Micklich <[email protected]> wrote:
> 
> Hi Philipp,
> 
> the whole branch is not finished yet and the algorithms change is only
> one part of it.
> 
> I introduces javax.measure to handle units. So far I think it is not
> possible to use qudt the way I want to.
> QUDT is only for semantic purpose useable, is this correct?
> 
> So the user can choose from different output units, which will be
> handled inside the SpLengthCalculator class.
> 
> Another tasks is to set the users chosen unit to the output strategy:
> .measurementUnit(URI.create("http://qudt.org/vocab/unit#DEPENDINGUNIT";)
> )
> 
> How can this be done?
> Greetings
> Florian
> 
> 
> 
> Am Freitag, den 22.05.2020, 19:33 +0000 schrieb Philipp Zehnder:
>> Hi Florian,
>> very cool!
>> 
>> Do you want to merge the branch directly into dev or are there any
>> open issues?
>> 
>> Philipp
>> 
>>> On 21. May 2020, at 13:17, Florian Micklich <[email protected]>
>>> wrote:
>>> Hi all,
>>> 
>>> I resolved STREAMPIPES-131 and the result of the (geodetic)
>>> distance
>>> calculation is now more accurate. It is using now the GeographicLib
>>> [1]
>>> under MIT license. 
>>> 
>>> GeographicLib is used in many other "Geo-Tools" like PostGIS or
>>> QGIS
>>> and now even in StreamPipes.
>>> 
>>> 
>>> For a deeper look in the functionality, start here [2]
>>> 
>>> This is committed in the feature/geodesicCalc branch atm.
>>> 
>>> Greetings
>>> Florian
>>> 
>>> [1] https://geographiclib.sourceforge.io/
>>> [2] https://geographiclib.sourceforge.io/scripts/geod-calc.html
>>> 
>>> 
>>> Am Samstag, den 16.05.2020, 20:00 +0200 schrieb Florian Micklich:
>>>> Hi all,
>>>> 
>>>> I rewrote the Distance Calculation and Static Distance
>>>> Calculation
>>>> PE'
>>>> a bit.
>>>> 
>>>> The changelog:
>>>> 
>>>> * Introducing the term geodesic calculation
>>>> * Added  two new user parameters input fields. 
>>>>    * Number of decimal position for the calculation result
>>>>    * output unit to choose from (Meter, Km, Foot or Mile)
>>>> * Created SpLengthCalulatior Class to handle all kind of length
>>>>   measurement and calculation results. Included here the method
>>>> from
>>>>   the DistanceUtility.class and rewrite the return statement to
>>>> fit
>>>> to
>>>>   the new  SpLengthCalulatior object.
>>>> * Handle different Units via javax.measurement (license BSD) in
>>>> the
>>>>   SpLengthCalulatior constructor. This is the first attempt and
>>>> feel
>>>>   free to discuss this implementation and possible compatibility
>>>> of
>>>>   qudt!
>>>> * added maven dependencies to pom file
>>>> * Output-Strategy with two parameters: value und type of unit
>>>> * Completed documentation
>>>> * Added Icons
>>>> * In Static Distance Calculation added range check for user-
>>>> input
>>>> Lat
>>>>   Lng values
>>>> * Added default values in Static Distance Calculation for faster
>>>>   testing (will be removed later on)
>>>> 
>>>> I tested everything with the ISS Adapter and the Static Distance
>>>> Calculator.
>>>> 
>>>> ToDo's: 
>>>> * set dynamic qudt output in output strategy depending of the
>>>> user
>>>>   choice
>>>> * improvement of Units-Symbol
>>>> 
>>>> The calculation result can be improved with another algorithm.
>>>> Therefore i created a Jira Ticket(STREAMPIPES-131).
>>>> 
>>>> These implementation can be found atm in the feature/geodesicCalc
>>>> branch.
>>>> 
>>>> Greetings
>>>> Florian
>>>> 
>>>> 
>> 
>> .........................................................
>> M. Sc. Philipp Zehnder
>> Wissenschaftlicher Mitarbeiter | Research Scientist
>> Information Process Engineering (IPE)
>> 
>> FZI Forschungszentrum Informatik
>> Haid-und-Neu-Str. 10–14 
>> 76131 Karlsruhe, Germany
>> Tel.: +49 721 9654-805
>> Fax: +49 721 9654-806
>> 
>> [email protected]
>> https://www.fzi.de/mitarbeiter/philipp-zehnder
>> 
>> .........................................................
>> FZI Forschungszentrum Informatik
>> Stiftung des bürgerlichen Rechts
>> Stiftung Az: 14-0563.1 Regierungspräsidium Karlsruhe
>> Vorstand: Prof. Dr. Andreas Oberweis, Jan Wiesenberger, Prof. Dr.-
>> Ing. J. Marius Zöllner
>> Vorsitzender des Kuratoriums: Ministerialdirigent Günther Leßnerkraus
>> .........................................................
>> 
>> 

.........................................................
M. Sc. Philipp Zehnder
Wissenschaftlicher Mitarbeiter | Research Scientist
Information Process Engineering (IPE)
 
FZI Forschungszentrum Informatik
Haid-und-Neu-Str. 10–14 
76131 Karlsruhe, Germany
Tel.: +49 721 9654-805
Fax: +49 721 9654-806

[email protected] <mailto:[email protected]>
https://www.fzi.de/mitarbeiter/philipp-zehnder
 
.........................................................
FZI Forschungszentrum Informatik
Stiftung des bürgerlichen Rechts
Stiftung Az: 14-0563.1 Regierungspräsidium Karlsruhe
Vorstand: Prof. Dr. Andreas Oberweis, Jan Wiesenberger, Prof. Dr.-Ing. J. 
Marius Zöllner
Vorsitzender des Kuratoriums: Ministerialdirigent Günther Leßnerkraus
.........................................................

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