patrick o'leary wrote:
> 
> CartesianTier's adequately describes what the design does- Layer one
> cartesian coordinate system on top of another....
> 
So, you all agree that it is Cartesian and that it evokes the idea of 
layers, but it's not a grid and it's not tiles; the original author is 
very attached to the name of "tiers", but most others seem to think that 
it does not really roll of the tongue easily nor is it very commercial.
It may also be somewhat confusing :

Wikipedia :
Tiers, also known as Ultra Checkers, is a complex variant of checkers 
that allows players to upgrade their pieces beyond kings. It is played 
on a standard eight by eight checkers board with two opposing players. 
The game has gained popularity amongst many northeastern collegiate 
students in the US.

Given this, how about CartesianBranes ?

Wikipedia again :
In theoretical physics, a membrane, brane, or p-brane is a spatially 
extended mathematical concept that appears in string theory and its 
relatives (M-theory and brane cosmology) that exists in a static number 
of dimensions.

I find that it rolls better off the tongue, it has a connotation with 
layers and a mysterious but highly intellectual flavor, it is not 
limited in its number of dimensions, it extends over time as well as 
space and should please physicists and mathematicians alike.
And the occasional but unavoidable misspellings by future users and 
forum contributors should provide much enjoyment for years to come.