".Blueskies." wrote in message
y.net...
According to the naco link below, these are populated areas. I know I
always thought it was the outline of lights also,
but I cannot find that defined anywhere...

They are not defined to be "well lit areas", but they aren't an official
depiction of "non-sparsely populated areas", and as a matter of mapping
expedience, I don't doubt that the area is based upon the general nighttime
view of a region.

The most important thing to be aware of is that the VFR charts are *not*
useful for determining where you are with respect to 91.119.

Pete