[Proj] Help translating NAD83 coordinates to WGS84

DAVID Thayer david.thayer at state.co.us
Wed Jan 5 12:29:30 EST 2005

>>> cewallace at neogas.com 2004-12-28 5:35:39 AM >>>
>I stumbled across this site in search of projection issues. I work
>a program called MapInfo Professional, and the street files we use is
>the NAD 27 format Tiger data. Then we purchased the update which was
>Tiger data using the NAD 83 projection. Once bringing the two on top
>each other there is huge differences. Is there a fix to convert our
>fields? Also what is the difference between NAD 83 & WGS 84?  

To fix your data you might want to have a look at the ogr2ogr utility
<http://ogr.maptools.org/>. I've only used it with ESRI shapefiles for
this purpose, but the documentation indicates that it works with
Mapinfo files.



Dave Thayer, Public Health Engineer 
Colorado Department of Public Health and Environment
Air Pollution Control Division / Stationary Sources Program
david.thayer at state.co.us,   Voice:303-692-3187,   FAX:303-782-0278

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