API to calculate distance in kilometers between 2 GPS locations

[Hyperbytes]

Wow, nothing in a year then two people looking at the same issue within 24 hrs.
Take a look at those thread, if you need more info come back to me.

Delivery zones/radius

Quick question as a Wappler Newbie How would I go about setting up a tool that would calculate if a user’s address is within a set radius? For example, on an ecommerce admin panel, the store owner would set up a maximum delivery radius which would save the value to a database field. Once a user goes to checkout, I would need the site to perform a check to see if their address is within the preset delivery radius. If not then the user wouldn’t be able to checkout and pay. Would it be po…