Hi all,

Ready for another of my OT questions? :-)

I'm trying to find a map or other data that can tell me the local
gravitational acceleration if I know the lat/lon of a point on the earth.
In other words, I need to find out the local gravitational acceleration
to better than 1 milliG in Ithaca NY. So far in searching the web, I have
not found anything that gives this information (at least not directly, I
found maps of height above the Geoid but I don't know everything that I
need to know in order to convert this to simple local gravitational accel).

Any ideas?

Thanks,

Sean

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