WIP: ZIP code database for Dart
Allows to search for ZIP code closest to geographical location.
WIP: Allows to search for ZIP codes within specified radius around geographical location.
Uses integer-based geohash codes
ZIP code geo coordinates (ZCTA) are taken from US Census Bureau Gazetteer files: https://www.census.gov/geo/maps-data/data/gazetteer2018.html
License
MIT