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davglass / zipcodes

Zipcode lookup node module
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How accurate are the lat/lng coordinates? #9

Closed atsepkov closed 7 years ago

atsepkov commented 7 years ago

I noticed that latitude and longitude coordinates for the zip codes are limited to 2 decimal places. According to Wikipedia (https://en.wikipedia.org/wiki/Decimal_degrees), that's an error of +/- 1.1 km. That sounds like something that could easily put you in a neighboring zip code instead of the intended one, unless the coordinates are hand-picked to be exactly in the center of the zip code, and given the number of entries in the table that doesn't sound feasible to do for each one.

davglass commented 7 years ago

I pull the data from another location, I don't have control over their data, I'm just using it :)