Hi Jc.

How big of a difference are you seeing and what are the specific locations/addresses?

I think it may arise from at least three general and related issues.

1.) Difference in geocode quality. Whereas for a street segment MapPoint 2002 may not have had an address range and it geocoded to the centroid of the street segment, MapPoint 2004 may now have the range and it geocodes more precisely. Note this can also go in the other direction, for a specific street segment, MapPoint 2004 may have lost the address range.

2. ) Shifting streets. This refers not to geomorphological and tectonic activity, but rather the street data vendors may get the roads more accurately digitized and in line with actual GPS readings.

3. ) Change in data vendor for an area. Microsoft uses a couple different data vendors and then makes a "cut" or merge of the two data sources and uses each where it is most accurate. The data vendors being used for a specific street or area may have changed between the two versions.

hope this helps!
Eric

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