So it sounds like adjacency will be important too? In other words...we
don't want to merge features that aren't adjacent or topologically
connected?
Landon
On Wed, Sep 10, 2014 at 1:43 PM, Landon Blake <sunburned.surve...@gmail.com>
wrote:
> 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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>>
>
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