I'm always surprised that this mapping information doesn't generate any interest. Sdcfia wrote about this type of mapping in his book New Mexico Confidential: 30 Years of Snooping in Obscure Places. Some of these mapping points are close to areas associated with treasure legends. In fact, treasure legend terrain features are sometime a part of the mapping.
Anyway, here is more information about the Wildcat Bluff triangle. A few miles from Wildcat Bluff, Iowa is a town named Center Point. About nine miles from Wildcat Bluff, Ark., is a town named Center Point. I couldn't find any evidence of a town named Center Point near Wildcat Bluff, Ill., but here is where Google Earth comes in real handy. If you map a line from Wildcat Bluff, Ill. to the midpoint of the line that connects Wildcat Bluff, Iowa to Wildcat Bluff, Ark., that line passes by two peaks in eastern Missouri named Wildcat Mountain. These two mountains are about 35 miles apart on a NE to SW line. If you run a line from the NE Wildcat Mt. to the SW Wildcat Mt. and extend that line across Texas, you will pass right through a town named Center Point. So, we have three Wildcat Buffs, with two close to towns named Center Point and one associated with a town named Center Point, by code. Here are a couple of interesting facts about Center Point, Texas. Turtleisgold, you mentioned a pyramid/eye carving at Giant City. The latitude of Center Point, Texas is 29 dgrees 57' 08". The latitude of the Great Pyramid of Giza, Egypt is 29 degrees 58' 34". Also, just north of St. Augustine, Florida, is the same latitude as Center Point, Texas, 29 degrees 57' 08". The distance from Center Point, Texas to St. Augustine, Florida is 1062 miles. The distance from Center Point, Texas to the southwestern most point in the United States is 1083 miles. So Center Point is pretty much the center point of the southern United States.
In the area about 25 miles NW of Wildcat Bluff, Arkansas, the treasure hunter, Bob Brewer, recovered two or three treasure caches that he documented in his book Rebel Gold. His treasure trails also included carvings on trees.