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accuracy

This is a discussion on accuracy within the MapPoint Desktop Discussion forums, part of the Map Forums category; I've noticed that, not only in mapquest, but also in multiple vehicles' nav systems that the street where I live ...

  1. #1
    Anonymous is offline Senior Member Black Belt
    Join Date
    Jul 2002
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    5,137

    accuracy

    I've noticed that, not only in mapquest, but also in multiple vehicles' nav systems that the street where I live has about 1/3 mile inacccuracy from house number to actual location.
    my address: 2320 Fairview Drive
    Alton, IL 62002

    donfricke@hotmail.com

  2. #2
    nringdahl is offline Junior Member Yellow Belt
    Join Date
    Jan 2004
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    Since NavTech is the main data provider to MapPoint, I assume that MapPoint uses the same technique as NT in geocoding addresses. That is that a link knows its street name and the start and end numbers of the street. The position for a number between the start and end numbers are intrerpolated between these, resulting in an inexact but memory efficiant solution.

    - Niklas

  3. #3
    Eric Frost's Avatar
    Eric Frost is offline Administrator Black Belt
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    I think in that case Microsoft may be using GDT as the data provider for the area in Alton. Navtech generally drives the roads and the GPS accuracy is perfect.

    Eric
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