Hi Ian,
I think this could be a nice improvement (automatic classification), but
our customer is explicitly asking for the ability to specify custom
intervals. so we should at least support both capabilities.
Mauro
2017-09-04 12:37 GMT+02:00 Ian Turton <[email protected]>:
> Rather than having to pass in a list of class breaks it would be nice to
> be able to specify a org.geotools.filter.function.RangedClassifier and
> the number of classes required.
>
> Then you can do something like:
>
> Function classify = ff.function(classifier.getName(),
> ff.property(attribute), ff.literal(numberOfClasses));
> Classifier groups = (Classifier) classify.evaluate(collection);
>
> to get the breaks.
>
> Ian
>
> On 4 September 2017 at 11:14, Mauro Bartolomeoli <mauro.bartolomeoli@geo-
> solutions.it> wrote:
>
>> Hi,
>> I am currently working on a process that would reshape vector features,
>> to add a classification field.
>>
>> The resulting feature will be a copy of the source, with the additional
>> attribute calculated classifying the source on a specified attribute using
>> given intervals (by the user as input parameters).
>>
>> This will allow further processing, for example aggregating on the class
>> attribute with the Aggregate process (using WPS nested processes).
>>
>> For the purpose I would reuse:
>> - CategorizeFunction to calculate the class attribute
>> - TransformProcess to reshape the source, adding the new attribute
>>
>> The new process will accept the following inputs:
>>
>> - features (the source feature collection)
>> - classifyOnAttribute (the attribute to use as an input for
>> classification, e.g. PERCENTAGE)
>> - thresholds (comma delimited list of thresholds for the required
>> intervals, e.g 10,30,60,100)
>> - outputAttribute (name of calculated attribute with class values, e.g.
>> CLASS)
>> - outputValues (comma delimited list of values to be assigned for each
>> interval, A,B,C,D,E)
>> - include (true or false, to define if thresholds are included (compared
>> with greaterOrEqual) or excluded (compared with greater) in an interval
>> instead of the following one.
>>
>> Any doubt / opinion / advice?
>>
>> Thanks.
>>
>> --
>>
>> Regards,
>>
>> Mauro Bartolomeoli
>>
>> ==
>> GeoServer Professional Services from the experts! Visit
>> http://goo.gl/it488V for more information.
>> ==
>>
>> Dott. Mauro Bartolomeoli
>> @mauro_bart
>> Technical Lead
>>
>> GeoSolutions S.A.S.
>> Via di Montramito 3/A
>> 55054 Massarosa (LU)
>> Italy
>> phone: +39 0584 962313 <+39%200584%20962313>
>> fax: +39 0584 1660272 <+39%200584%20166%200272>
>>
>> http://www.geo-solutions.it
>> http://twitter.com/geosolutions_it
>>
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>
>
> --
> Ian Turton
>
--
Regards,
Mauro Bartolomeoli
==
GeoServer Professional Services from the experts! Visit http://goo.gl/it488V
for more information.
==
Dott. Mauro Bartolomeoli
@mauro_bart
Technical Lead
GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
http://www.geo-solutions.it
http://twitter.com/geosolutions_it
-------------------------------------------------------
AVVERTENZE AI SENSI DEL D.Lgs. 196/2003
Le informazioni contenute in questo messaggio di posta elettronica e/o
nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il
loro utilizzo è consentito esclusivamente al destinatario del messaggio,
per le finalità indicate nel messaggio stesso. Qualora riceviate questo
messaggio senza esserne il destinatario, Vi preghiamo cortesemente di
darcene notizia via e-mail e di procedere alla distruzione del messaggio
stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso,
divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od
utilizzarlo per finalità diverse, costituisce comportamento contrario ai
principi dettati dal D.Lgs. 196/2003.
The information in this message and/or attachments, is intended solely for
the attention and use of the named addressee(s) and may be confidential or
proprietary in nature or covered by the provisions of privacy act
(Legislative Decree June, 30 2003, no.196 - Italy's New Data Protection
Code).Any use not in accord with its purpose, any disclosure, reproduction,
copying, distribution, or either dissemination, either whole or partial, is
strictly forbidden except previous formal approval of the named
addressee(s). If you are not the intended recipient, please contact
immediately the sender by telephone, fax or e-mail and delete the
information in this message that has been received in error. The sender
does not give any warranty or accept liability as the content, accuracy or
completeness of sent messages and accepts no responsibility for changes
made after they were sent or for other risks which arise as a result of
e-mail transmission, viruses, etc.
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