Helicopter Chart Question

[deafsound]

What's the difference on helicopter charts between the white color and the purple-ish beige color?
There seems to be no rhyme or reason to it as far as I can tell.

Thanks

 

[Richard]

It's a heliflopter, there is no ryhme or reason.

However, I do admit to latent rotor tendencies.

 

[deafsound]

Never mind kids.....it populated vs unpopulated areas.
​

 

[gprellwitz]

Never mind kids.....it populated vs unpopulated areas.
​

Does that mean that we now have a place to look to determine what the FAA considers "populated"?