Single landscape face is 100 unreal units = 1 meter. Depending on number of components you need to apply different scale. For 8129x8129 (vertices) you need to apply 20000 [m] / 8129 [m] = 2.46 scale for X and Y.
Single landscape face is 100 unreal units = 1 meter. Depending on number of components you need to apply different scale. For 8129x8129 (vertices) you need to apply 20000 [m] / 8129 [m] = 2.46 scale for X and Y.