I want to zoom in or zoom out to a certain scale when I'm using Mouse Wheel.
for example, I want my map to zoom in or zoom out in the following scales when I'm using Mouse Wheel.
{1000000, 500000, 250000, 100000, 50000, 25000, 10000, 5000, 2500 }
How can I do that? I'm excepting your reply !
thank you very much!