How can cut the object to 8kmx8km?

[MrPanthouse]

Hello,

So for the past hour im trying to figure out how I can cut the srtm to an exact square of 8km by 8km.

What I did was i made a cube 8km by 8km went to edit mode and used the knife tool and enabled cut trough but it didnt cut trough the terrain.

And when i just set the terrain size to 8kmx8km it sizes down the terrain yes but it doesnt cut which makes the object squeeze instead of just cutting of the the sides.

Also i couldnt realy find an answer here or on the blender forums.

Hopefully someone can give me a direction thanks,
Gert-Jan

[MrPanthouse]

I think i found out how.

what I did was put the cube inside the terrain(or just the terrain in the cube on its middle point)
the A added the bolean moddifier on the terrain selected the cube as object then I selected intersect and hide the cube and its exactly what I want.

Maybe someone else finds this usefull to?