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Re: merging aggregates/ vertex isssue...

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Subject: Re: merging aggregates/ vertex isssue...
From: Pierre (bommel@cirad.fr)
Date: Tue Nov 21 2006 - 18:37:17 CET

Ola Anne,

No, there isn't predefined method to check neighbouring aggregates.
But you can use the "surround" method that returns a collection of cells that do not belong to the aggregate.
So you can use something like :

getNeighborAggregates
    "return a set of neighbor aggregates"
    | set |
    set := Set new.
    self surround do:[:cell | set addAll: cell theCSE].
    ^set

I think this method should redefine the "neighbouhood" method of SpatialEntitySet, for the next release...
Hope it helps.
Até mais,
    Pierre

Anne Dray a écrit :
Dear all,
 
Is there an easy way to check whether two neighbouring aggregates share at least one segment (and not just a vertex)?
 
I'm trying to set up a land market where farm plots (aggregates) can be sold/bought within their neighbourhood. I'd like to avoid the case when one farm can buy another one even though they only have one vertex in common.
 
...does it make sense ?
 
many thanks!
anne
 

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Pierre Bommel - CIRAD - UR Green
Universidade de Brasília - CDS
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