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Posted by user923005 on May 30, 2007, 7:47 pm
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> I am geocoding addresses from Tiger line data which I extract from
> Tiger files and place into a sql db. In preparation for the release of
> the Tiger data in shape file format I have written an application to
> extract the address segment data and coordinates from shapefiles. I
> have been using the ESRI Tiger shape files for testing. However, I
> think the coordinates in the shape file are stored in a different
> projection than those in the Tiger Line files considering that the
> points I have extracted from the shapefile are 10-15 miles off from
> the points in the Tiger Line files. I amexperienced developer but
> somewhat of a beginner at GIS. I understand the concepts but have very
> little experience with dealing with projections. If anyone could point
> me in the right direction I would appreciate it My intent is to
> extract the data, apply the transform and then save the data in a db.
Geodetic Model: Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: Geodetic Reference System 80
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257222
Projection is transverse mercator.
What are you using?
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