Adding a reference image to use to build an airport

Hi, So I’m trying to build a custom airport. I’ve drawn out the airport
outline and where all the taxiways, runways, terminals should be. I want to
scan this drawing and import it into the project to more accurately place all
the objects. I’ve found videos on custom aerial image but I was wondering if
there was a simpler/other way since the drawing would be deleted once
complete. Thanks in advance.

The secondary aerial is the best solution because it ensure the background
image is below everything else Antother option is to make a Projected Mesh: a
very simple 3d object (a plane/cube) using as texture your drawing,once
imported as projected mesh the texture will drape on terrain Obviously this
object must be the correct scale (and the texture as well)