Do you know the regions of Texas? This map might have nailed them down

Hill Country. Coastal Bend. West Texas. We've all heard the terms to describe the geographical regions of Texas, but can anyone say for certain where one region ends and the other begins? 

Chet Garner seems to have it mapped out. No stranger to traveling across Texas as the host of the PBS show "The Daytripper," Garner posted a marked-up map of the state on his Instagram Wednesday. Each region is sectioned off with a red border and a name. There are familiar regions like the Valley and Panhandle, but he even took the liberty of naming a new region. 

"I also made up a region called the 'Heartland' because there is no other good name for the Brenham/Bryan area," wrote Garner. 

In his map, Travis County falls under the "Hill" region along with neighboring Blanco, Burnet, Hays, and Williamson. Bastrop and Caldwell counties are classified as "Heartland." Despite the common use of "Central Texas" to describe Austin and its neighboring counties, the "Central" region on his map includes counties further north of the capital area, such as Bell. 

What do you think of his map? Do you disagree with the way the regional border lines are mapped out? Let us know in the comments.