/*Hi guys,
I would very much appreciate your advice here. I have to perform a merge
by value operation over a polygon geographic database with more than
300000 parcel records. In the first attached image
(MergeByValueProblem1.png), I have place a small sample to show what is
all about. As you can see, every single polygon is an individual area
with full topology and corresponding ID. I have to merge all clustered
or contiguous polygons (sharing at least one border) into a new one,
that is dissolving the internal lines to produce a bigger resulting
area. I would normally use the Merge by Value command, but the problem
here is that only the clustered polygons should be merged and the
resulting polygons should have a individual new ID (just in case that
some merging was produced), area and perimeter, and all previously
isolated areas should remain like that. In the above described example
the successful operation should ends up with just 7 polygons (see the
other annexed sample, MergeByValueProblem2.png).
As I have said the real set is simply too big to do this by hand, so I
would have to find some kind of automation on the process. As an
additional information there are regions (see the black thick line) that
encloses subsets of this small parcels so it is possible to perform an
attribute tagging in order to identify which parcels belong to each
region or "districts" but again the resulting standard merge by value
operation would result on a non desired result.
Thanks in advance for any aid you could provide on this matter. Cheers,
Reinaldo*/
