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Them there are PO Boxes and Unique addresses (like big companies with their very own ZIP codes). If you're bringing them in from a typical ZIP code file there will probably be some sort of field that contains codes like P, U, and then a lot of blanks. My ZIP source calls this field ClassificationCodes. Filter the Ps & Us and the dot will likely go away. If you still have some dots, then filter to the Primary Record field to only Ps.
Hope this helps,
Okay, I thought that may be the case, I just didn't think there would be any in Alaska, but apparently there are.
Any ideas on finding out which zip codes are too small? I got this data second hand so I don't have a zip database that I know of. I looked at this website: http://factfinder2.census.gov/faces/nav/jsf/pages/searchresults.xhtml?refresh=t and it appears that I have downloaded the number of business establishments in a single zip-code. Seems like maybe I can use that to find single business zip codes.
Actually I was able to find this website:
It gives square area of a zip code. Seems a little dated (2010 data) but gives me most zip codes. I was able to reduce many of the 'dots' but not all. If anyone finds a better solution let me know.