Observe the maps and compare:
Notice that Keyser would be in the Potomac Highlands section of West Virginia. Also note that Weirton would be in the Northern Panhandle section.Parkersburg would be in the Mid-Ohio Valley section, etc.
Notice that the longest section is the Potomac Highland section. The Southernmost section is the New River/Greenbrier Valley section.The Easternmost section is the Eastern Panhandle section. The Westernmost section is the Metro Valley section.
You can make many more comparisons using 2 maps that exhibit different features.
Notice that the westernmost region of West Virginia is the Metro Valley region. Huntington is in the Metro Valley.
Also, observe that the northernmost region of West Virginia is the Northern Panhandle region. Wheeling and Weirton are in the Northern Panhandle region.
The southernmost region of West Virginia is the New River/Greenbrier Valley region. Bluefield and Princeton are in the New River/Greenbrier Valley region.
The easternmost region of West Virginia is the Eastern Panhandle region.
Another interesting region in the northern part of West Virginia is the Mountaineer Country region. Clarksburg and Morgantown are located in the Mountaineer Country region.
The longest region is the Potomac Highlands region of West Virginia. Keyser is located in this part of the state.