What data does it use to assess the nearest store/service provider?
PostCoder Web Nearest will initially accept a list of your stores/service providers to upload to the service, or a reference file to link to your list to protect your data. Then it allocates grid references to each Postcode so that when a user types their Postcode or town into your website, behind the scenes the PostCoder Web Nearest service looks up a grid reference and queries your initial file upload to display the nearest results to the online user.