What changes is the objects' actual positions on the earth, not
their coordinates. In other words (-105, 40) in NAD 83 is about
150 feet east of (-105, 40) in NAD 27. If you create a point at
this location and save it in a table with a NAD83 projection, and
then save it to another table with a NAD 27 projection, and open
both of these on the same mapper, the one that has the coordinate
at (-105, 40) will be the from your FIRST layer in your mapper.
The other gets a coordinate slightly different because it's being
displayed in a coordinate system different from its native one.
Open a new mapper with the layers reversed and the other point is
"correct". (This is because the mapper gets its coordsys from the
first map layer displayed in a mapper.)
- Bill Thoen
[EMAIL PROTECTED] wrote:
>
> All,
> I have a map in NAD27. When I "Save Copy As..." the map to another file,
> changing the projection to NAD83, all the features in the new map have the
> exact same lat,long values. I was under the impression that a feature's
> specific location in NAD27 would change a little bit in NAD83. ex: NAD27 77.5
> w, 39.0 n = NAD83 -77.4899 w, 38.889 n. Any answers?
> Thanks,
> Pete
> [EMAIL PROTECTED]
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