[GRASSLIST:5000] Re: [GRASS5] v.patch in 5.7 problems

Radim Blazek blazek at itc.it
Tue Nov 30 05:24:41 EST 2004

Maciek Sieczka wrote:
>>>After re-thinking my problem I'd say that it should rather be a regular 
>>>bug - in my opinion in one vector file there may not be two diffrent 
>>>features having the same "field:" and "category:" which happens when 
>>>using v.patch. Am I wrong?
>>Both can be useful, preserve cats or assign new unique cats.
>>Ideally v.patch should support both. A Bug is if it does not do what it
>>should - what is written in man. A wish is if a feature is missing.
> According to what you say I still claim that the issue that v.patch doesn't assign unique cats to each single element of a resulting vector file is a bug, since such a feature *is present* in v.patch in Grass 5.0/5.5.  Not porting this feature to v.patch in 5.7 is an errorous disabling one of it's features.

Send us a patch.


1. don't remember to check if all tables have the same structure
    (column names and types)
2. Changing v.patch from low level (geometry elements) to high level
    (features with attributes) means that you have to overlay areas,
     i.e. to do something similar like v.overlay, otherwise
     it can work only on points and lines - do not forget
     that one geometry can represent more features.

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