Okay, I was actually confused by your original comment, and I really did not mean to take us to a geography lesson. I now realize that the important thing that you were trying to convey was that the gaps (from Madera) were from a place far south of Lodi. I didn't understand before, but I understand now.
Just for your info, the "Central Valley" is a large, large area. it spans from Redding in the North to Bakersfield in the south, a distance of ~450 miles. This is the area called "Inland Valleys" on your map. The northern part is called the Sacramento Valley, and southern part is called the San Joaquin Valley (obviously, after the rivers that drain them). Most of the grapes are grown in the San Joaquin Valley. Grapes grown anywhere in that region (either valley) are called "Central Valley grapes," and a lot of jug wine grapes are grown there. It accounts for more than 1/2 of all California wine.