When creating the landscape, scale the xyz down (from its base 100) to something small. that way the landscape tri count will stay the same but scale will be adjusted. then 3d model a table and place the landscape on it 
When creating the landscape, scale the xyz down (from its base 100) to something small. that way the landscape tri count will stay the same but scale will be adjusted. then 3d model a table and place the landscape on it