Zip Code, Latitude, Longitude. (Zip Lat Long).
DEFENSE CIVIL PREPAREDNESS AGENCY COMPUTER CENTER OLNEY MD
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This file contains the latitude and longitude coordinates for each zip code shown in the 1974 zip code directory published by the U.S. Postal Service with the exception of the A.P.O.s Coordinates are provided in terms of degrees, minutes, and seconds. The coordinates were developed in one of five ways indicated by a type flag 1 a computation based upon the 1970 Census tracts which comprise the zip code area 2 earlier maps readings of post offices located outside the Standard Metropolitan Statistical Areas 3 the assignment of the coordinates of the main post office to a branch, if there was no other way to locate the branch 4 the assignment of the coordinates of a minor civil division MCD to a post office 5 current map readings. The record format is as follows Cols. 1-5 Zip Code, 6-11 Latitude, 12-18 Longitude, 19 Type Flag, 20-80 Comments appear for types 3, 4, 5. There are 37,408 records in the two tapes.
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