API returns high confidence for a bad postal code RRS feed

  • Question

  • Hello,

    When sending this URL:{key}&postalCode=4622RD%20-%2020&countryRegion=NL

    The service returns the following coordinates, that appear to be in the middle of the country:

    Latitude Longitude
    52.3422584533691 5.52815723419189

    With a degree of confidence "high".

    The postal code is erroneous, of course. So why is the service returning GPS coordinates AND a high degree of confidence?

    I would expect a different behavior here.

    Best Regards,



    Thursday, February 15, 2018 3:25 PM


  • This is to be expected as "Netherlands" is a strong match for your input but up the hierarchy as a CountryRegion result. The match code for this query confirms that it is an UpHierarchy match.

    That said, I highly recommend aligning with the documented best practices here: In this case use a single string query rather than address parts. For example, modifying your query to "4622RD - 20, NL" result in a postal code in Amsterdam. The request URL looks like this:

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    Thursday, February 15, 2018 5:01 PM