thanks Paul for your reply. Some products, as ArcMap, have two operation Merge and Union.
In Merge source layer and target layer must be the same (this operation deletes source features). In Union source layer and target layer must be not equals (this does not delete source). We are thinking about if is needed two operations, Merge and Union, because the tool can distinguish one or other situation detecting if the user has selected a different layer as target (source != target ). If you agree with "option 2" then, Can we infer that only one operation is required? Regards On Tuesday 05 December 2006 20:19, Paul Ramsey wrote: > Option 2, clearly. If you are running operations that create new > data, the source data should be left unchanged. > P > > On 5-Dec-06, at 11:17 AM, Victor Mauricio Pazos wrote: > > Hi, we are defining the merge operation, the team has the follow > > question: > > > > Transaction Merge "FA merge FB =?" > > > > 1) First option: > > - deletes FA and FB from source layer > > - creates new FMerge on target layer > > > > 2) Second option: > > > > - if target layer is equal to source layer then "deletes FA and FB" > > from > > source layer; else no action. > > - creates new FMerge on target layer > > > > As you can see the first option always delete the source features. > > > > The following link has the first idea for Merge operation. > > http://udig.refractions.net/confluence/display/COM/Axios > > > > What do you think that is the best approach for Merge Transaction? > > > > Thanks in advance > > -- > > Mauricio Pazos > > > > Axios Engineering > > www.axios.es > > e-mail: [EMAIL PROTECTED] > > tel-:+34 94 441 63 84 > > fax: +34-94 441 64 90 > > _______________________________________________ > > User-friendly Desktop Internet GIS (uDig) > > http://udig.refractions.net > > http://lists.refractions.net/mailman/listinfo/udig-devel > > _______________________________________________ > User-friendly Desktop Internet GIS (uDig) > http://udig.refractions.net > http://lists.refractions.net/mailman/listinfo/udig-devel -- Mauricio Pazos Director Axios Engineering www.axios.es e-mail: [EMAIL PROTECTED] tel-:+34 94 441 63 84 fax: +34-94 441 64 90 _______________________________________________ User-friendly Desktop Internet GIS (uDig) http://udig.refractions.net http://lists.refractions.net/mailman/listinfo/udig-devel
