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MP2K Asks Microsoft
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Ron Cook
-
April 10, 2003
I work for the cable industry and we are trying to show (grahically) where a given provider serves.
Since we associate a provider with a Zip+4 (e.g. 80027-9597), how can I plug that value into MapPoint and have it show be that specific geographic area (i.e. shaded with defined border)?
Thanks!
Ron Cook
Answers:
May 5, 2003
budapest to seatal
May 20, 2003
Ron, I don't have an answer for your question but I have a question for you based on what I read in your posting. I am also working with Zip+4 and mapping software, though not Mappoint. I'm using ArcIMS from ESRI.
My question is: What is your source of Zip+4 and lat/long information? I'm using a product from GDT (Geographic Data Technology) but it's expensive and I need to see what else is available.
Thanks,
Hugh.
July 10, 2003
As I understand it, Zip+4 is not a polygon. Zip is, but Zip + 4 is a list of address. Zip+4 is broken down to the actual route the postal carrier walks. This means if they walk down "main street", and a different carrier walks down the instersecting "maple st" One carrier may walk down "Main St" delivering mail in one Zip+4, and then PASS addresses on "Maple St" in a different Zip+4. The only way to make Zip+4 Polygons, is to get the Tract and Lot boundaries for each lot of the included addresses, and try to combine them into a polygon, or a series of adjacent polygons.
With this solution, certain areas would appear to have multiple Zip+4's, and portions of one Zip+4 may be appear to be "inside" another Zip+4. That's probably why a vendor is charging a lot for the data, they have to combine two sources : Postal and the local parcel information. AND they have to cleanup. Not trivial at all.
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