How to: Zip Code (Postal Code) / Suburb lookup + proximity check

Need help
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Does anyone have any recommendations on how I would implement the following:

  1. Via a single input on a page, a user can enter either a zip code (or postal code), and is returned results for them to select (almost like a search and select).
  2. In my DB I have a bunch of businesses with an address (type ‘Geographic address’). Via a workflow (on submit), I want to return a list of addresses that are within 50km of the zip code (postal code) / suburb selected in Step 1.

Thanks!

2

Anyone?

3

Surely someone knows…? I was hoping there would be a way to do this using a Google API, but it seems I might have to manually store a copy of suburbs, post/zip codes, and lat/long in my DB.

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