# File ../lib/roller/CWRP.rb, line 964
  def set_edge_height(height)
    height = height.to_f
    reset_progress 'Setting edge height', 1

    @terrain_height.first.map! { height }
    @terrain_height.last.map! { height }

    @terrain_height.each do |row|
      row[0] = height
      row[row.size - 1] = height
    end

    increment_progress

    height
  end