Top Causes of Errors in Online Mapping Systems

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Spatial data errors in online mapping and GPS navigation systems can send travelers off on the wrong route sometimes with comical but sadly, sometimes deadly results.  Having been burned by trusting online driving directions before, Chris Silver Smith from Search Engine Land reviews the top reasons online mapping sites have bad data.  Reasons he lists for bad data include inaccurate base data, accuracy of geocoding, lag time to incorporate newly developed areas and difficulty in interpreting variations on addresses.

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