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| GeoCommunity Mailing List |
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| Subject: | CLARIFICATION - RE: [gislist] cluster or group points in AV3.2 |
| Date: |
01/07/2004 03:25:00 PM |
| From: |
RICK GRAY |
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Hello listers and all who have offered suggestions so far,
It seems I need to offer a bit more detail (original question is at the
bottom). If your response actually covers my question even with this new
information, I apologize - I just haven't understood it.
My "overall" territory is most of the province of Ontario. I will have
350+ stations (all identical) spread out in a not very even distribution
throughout the overall territory - i.e. in some regions the density is
greater than others - sometimes significantly so. We need to divide
these into service territories given that an individual can service X
(+/-) number of stations in a day. In sparsely "populated" territories,
the number will be less because driving time will increase. However,
this will not likely greatly affect the overall results.
So... what I need to do is take a point file and divide it somehow into
groups - either by specifying the number in a group or by specifying the
number of groups.
Hope this clarifies my problem.
rg
* * * * * * * * * * *
Original Question:
My problem is this: I have a few hundred points on a map. I need to
group them (to make territories). Is there a script or a method to
cluster these into X points per territory. Or to divide the total into Y
territories and have ArcView group them. Sort of along the lines of
Thiessen polygons but for groups instead of individual points.
It would be best if I could work with selected points (to eliminate
small outlying clusters from the main calculation) but that could be
accomplished by removing the unwanted points first.
I do have both Spatial Analyst and Network Analyst available, if this
would help me.
If anyone has some ideas, or know of a script that already does this,
I'd love to hear from you.
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