Capital gains question about inherited land...

[boatbuilder]

I inherited six acres of agricultural land from my father in 1999, adjacent to my dwelling house.
Now in 2010 I'm considering selling it.
What implications does this have for Capital gains tax?

I know the rate is 25%, but 25% of what exactly?

Thanks for clearing this up!

 

[Joe_90]

Proceeds
Less Costs x indexation (1.193)
Capital gain
Less personal exemption 1270
x 25%