In article BbRUc.42104$TI1.17388@attbi_s52, "William W. Plummer"
wrote:

Getting vertical obstructions into databases is a huge huge problem.
Please don't assume that AvMap has them all.

Why is it a huge problem. At worst the FAA database can be used.

Because vertical obstructions change over time, not all towers
or other obstructions are reported, and who is going to verify
the accuracy of the reported location and height?

(btw - the FAA database would come from NIMA - or whatever they
are called now).

--
Bob Noel
Seen on Kerry's campaign airplane: "the real deal"
oh yeah baby.