Yes correct James, this is why its in '_'. Its called Hi-Res Color Aerial Imagery DOQQ.

Here is link to see the different types that come from the annual subscription. You can layer all or some of these on top of each other depending on the image and data you want to see in the unit.

TOPO 8.0 image types

Standard disclaimer just a fan. Bought the PN-40 last month and though it has a fairly steep learning curve compared to Garmin units, I find the end result more satisfying to me.