[q] stable large terrain sampler size?

[D3F3CT3D 25]

Thinking of creating large terrain for air vehicles, what is the best for performance in the sampler settings. thank you

 

Will this be correct for 3774 km'2 ? ----- i also want a decent satellite image , how can i tile it 4 times for each corner on 61440 ?

 

 

[dragonsyr 21]

for grid and cell sizes here 

:)