Question about GPS
It is estimated that 10–15% of the road
network changes every year. There is also inevitably
some human error/subjectivity in the creation
of a digital map.
All of which means that maps must be constantly maintained to keep the level of map errors as low as possible. Tele Atlas has extensive survey teams constantly out surveying new roads, changed roads, POI positioning and accuracy, map errors, etc.
Each change and fix is then checked before being built into the next map release. GPS vendors predominantly use Tele Atlas maps, then compiles the map vendor release and has it error-checked
This complex and labor-intensive process can mean it is several months before a map vendor’s new release is ready and fit for use in a GPS product.
Due to the high frequency of new map releases, there’s a small chance that a new map is released between the production of a GPS unit and the date that it is sold in retail.
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Posted on Feb 07, 2010
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Posted on Jan 02, 2017
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