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US postals with centers off by more than 10 miles  XML
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Joined: 03/01/2018 01:54:38
Messages: 4


I found 2,65 postal code which I am sure are more than 10 miles off from where they should be. My source of truth is the ZCTA shapefile published by the US federal government.

My method was to create centroids for each postal then join to the geonames postal data via the postal code. I calculated the distance from the geonames centroid to the ZCTA centroid using the haversine formula and output the postal, zcta_lat,zcta_lon if the distance was more than 10 miles.

Enclosed please find the postals which should be corrected. File is a CSV in postal,latitude,longitude format.



 Description csv of postal, correct lat, correct lon. The data in this file was computed from public domain data [Disk] Download
 Filesize 40 Kbytes
 Downloaded:  38 time(s)


Joined: 08/12/2005 07:39:47
Messages: 4006

ZCTA is far from reliable, this was actually our first source 12 years ago. I hope we have improved since.

Best Regards


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