I have a data set with ZIP +4 codes, and ideally, I'd like to map them (their centroids) as points. I'm not interested in their boundaries (since they're not really geographies anyway). Does anyone know of a resource that has point data for ZIP + 4s? Or might there be a better way to go about mapping this type of data?
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2 Answers
Nokia/NavTeq and TomTom both have datasets for sale/use that are Zip+4 points. These can be wildly inaccurate for many uses since a +4 record represents a Sector and Segment of a postal delivery route and can include several streets or miles of a single route.
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Update 1: after a search of and call to TomTom, they say they shut down the maps division (formerly TeleAtlas). Update 2: NavTeq is now called Here.– BStackCommented Sep 17, 2021 at 2:14
Your easiest option to map ZIP+4 centroids would be to buy centroid files from EASI, Datasheer, GreatData, Geolytics, Geocoder, or AccuZip.
You could also buy USPS ZIP+4 (non-geocoded) files and use GIS software or an API to geocode the address ranges.
The discussion in another post here might also be informative: US ZIP Codes +4 By State or County- Shapefile (or table/dbf)