Eli5: how does gps update new roads

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An intersection in my town just converted from a 4 way light to a roundabout, and the gps was changed to reflect within a week. Who does this and how???

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Anonymous 0 Comments

A couple of years ago I worked on a project converting a T-junction to a 4-arm roundabout, adding access to the adjacent business park.

When the roundabout opened, I went on Google maps and requested they update their map data in this location, stating it was now a roundabout. After about a week the maps updated.

I assume they used GPS track data from vehicles using the junction and “created” the junction outline from there. We didn’t send them any maps or drawings.

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