If possible do the same outside mainly where your utilities are. Gas, water, sewer, phone, cable, outdoor lighting wires, sprinklers. If you ever need to upgrade, repair or replace an underground line it helps to know where your existing lines are. People think that call before you dig services locate all underground lines, but they don't. Here power & gas only locate to the meter. If your meter is on a pole then buried to the house , it's not located. If your gas meter is on the lot line, from there to your house isn't located.