Interesting use case Jukka. Let me think about how this might work as a
plug-in.
Landon
On Sun, Sep 7, 2014 at 1:47 PM, Rahkonen Jukka (Tike) <
jukka.rahko...@mmmtike.fi> wrote:
> Hi Landon,
>
> My case last week was about parcel IDs and landuse codes and aim was to
> union areas so that polygons with same landuse and belonging to same owner
> would make one polygon.
>
> For another use see attached images and source data in Jump JML format.
> Data could present two highways with ref. IDs "100" and "200". Both
> highways have sections with speed limits "60" and "80". Aim is to merge
> segment of highway "100" with speed limit "80" together etc.
>
> Image one: Original segmented data
> Image two: Desired end result. Notice an extra: Highway "100" has speed
> limit "60" in two distinct places. I do not want them to be combined into
> multilinestring. OJ can handle this case with two subsequent operations:
> Merge selected features + Explode selected features.
>
> -Jukka Rahkonen-
>
>
>
>
>
>
> ------------------------------
> *Lähettäjä:* Landon Blake [sunburned.surve...@gmail.com]
> *Lähetetty:* 7. syyskuuta 2014 22:10
> *Vastaanottaja:* OpenJump develop and use
> *Aihe:* Re: [JPP-Devel] Union/dissolve by several attributes
>
> Jukka:
>
> Can you give me some more details on the actual union you are trying to
> accomplish? What do you integer attributes represent?
>
> Thanks.
>
> Landon
>
>
> On Wed, Sep 3, 2014 at 4:21 AM, Rahkonen Jukka (Tike) <
> jukka.rahko...@mmmtike.fi> wrote:
>
>> Hi,
>>
>> I would like to union features by two or perhaps more attributes. I
>> wonder if the current Union/Dissolve/Merge tool could be developed to
>> support the use of combined classes. In my use case I have two integer
>> attributes which define the classes and it is a bit tricky to calculate a
>> new concatenated field from those. Perhaps it is possible to do with the
>> Beanshell Attribute Calculator but it is not obvious for me how. An
>> example: I have two integer attributes and I would like to concatenate
>> their values to one field which I would like to use for merging later. If
>> the attribute values are A=80 and B=20, how could I conbine them into
>> "80-20" or something like that? Well, in this case I could do
>> (100xA)+B=8020 but what to do if I had also strings to concatenate as A=80
>> and B=true? I can do the task fine with Spatialite but it would be a bit
>> more fluent to do everything with OpenJUMP.
>>
>> -Jukka Rahkonen-
>>
>>
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>
>
>
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