[GRASS-user] limit Voronoi or other vector programs

[Wolf Bergenheim]

On 02.10.2008 04:06, William L. Baker wrote:
> I think someone is revising this program, and perhaps this problem can
> be addressed, but it may not be easy to program.

Yes Martin Pavlovsky is working v.voronoi2, as part of the Google Summer
of Code program, and he told me there should be a working first version
of it ready in about two weeks (in addons).

Martin, does your v.voronoi2 suffer from these kinds of problems? What
would you say to adding a where parameter that would allow one to limit
the points with an SQL query?

--Wolf

> Bill B.
> 
> Wolf Bergenheim wrote:
>> Another thing (which I'd like to see in GRASS 7.0) would be to have a
>> where parameter for all v. modules which would allow one to filter the
>> points based on the attributes (usually this is enough)
>>
>> --Wolf
>>
>> On 01.10.2008 21:03, Maris Nartiss wrote:
>>  
>>> Hello,
>>> currently there is no MASK support for vector data. Only solution is
>>> to extract a subset of whole dataset into new vector map/layer with
>>> existing GRASS tools (i.e. v.extract and others).
>>>
>>> Also MASK concept for vector data is easy to implement for vector
>>> points but it gets tricky with lines/areas. What should happen to
>>> line/area that crosses MASK border?
>>> Also as MASK normally is applied "on fly", it could be real show
>>> stopper when working with large datasets (i.e. LiDAR data).
>>>
>>> WBR,
>>> Maris.
>>>
>>> 2008/10/1 William L. Baker <bakerwl at uwyo.edu>:
>>>    
>>>> Hello,
>>>> It would be useful to be able to use something similar to r.mask to
>>>> be able
>>>> to limit the area that v.voronoi (or other programs) use. Is there a
>>>> way to
>>>> mask out particular areas?
>>>>
>>>> Bill B.
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>>>>
>>>>       
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>>
>>   

-- 

<:3 )---- Wolf Bergenheim ----( 8:>