There are about 70 million ZIP+4's in the USA. Buying a data file that
you can import into your own database typically costs around $10,000
from the small handful of companies that actually compile the data!
However, there are data broker companies such as Melissa Data
(http://www.melissadata.com/GeoCoder/geodata.htm) that sell a COM
object that you can query to get the let/lng of a ZIP+4. The Melissa
Data solution costs just over $1,000.
On Jun 26, 2005, at 8:29 PM, Jack Lauman wrote:
> A couple of months ago these was a discussion about ZIP code plotting
> on this list. Does anyone know how to calculate LONG/LAT coordinates
> from ZIP+4?
>
> Thanks,
>
> Jack
>
>
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