Sat nav destination storage

On 16/08/2020 at 12:39, ColinWR11 said:

I can enter destinations using postcodes without problems however my satnav stores previous destinations as" Offroad "followed by co-ordinates. This makes it impossible to reselect repeat destiations. How do I get it to store with the postcode I inputted?

That's because they are using postcode centroids from the postcode directory. They were intended for market research / government analysis to geo locate an address to area building bricks from census data (electoral ones or market research zones). Point mapping to an area etc for service usage.

Roads bend so centroids can  / will be off a road. Mib has the ability to tell you an address is off road or on the left or right if house numbered.

Postcodes are basically a unique UK thing. Other forms are much wider. The error that the developers have got in mib3 is the way they are using them. They should have some logic that matches them to the closest street and then commits that name and location to the destination not the x,y coordinates in the store.

If the road has been house numbered in the Here Maps cartography you are much better typing the house number and street. The search bar will also scan POIs. A business can have it's own postcode whilst a residential area the postcode is the "postman's walk". His delivery route with the elastic band round the envelopes to be delivered. The centroid itself may be incorrectly placed that use to be a bug of using the postcode directory in analysis.

So in summary I'd say it's the VAG contractors that took the Here Maps cartography that doesn't contain full postcode data in it, used the UK postcode directory but didn't perfect the implementation for the user correctly as you find in the likes of Co-pilot and previous Mib2 high etc.