Not quite yet.

You would be storing them according to millibars not feet.

With a range of 600.0 to 1100.0 there are 5000 locations. Each value uses 2 bytes' for a total of 10,000 bytes.

If the range is 2 decimals 600.00 to 1100.00 there are 50,000 locations that would require 100kbytes.

Definately "Within Scope".

Don't give up yet.

Darrel