Shima Tract
The Shima Tract is an island in the Sacramento–San Joaquin River Delta. It is part of San Joaquin County, California, and managed by Reclamation District 2115. Its coordinates are , and the United States Geological Survey measured its elevation as in 1981. It appears on a 1952 USGS map of the area. The Shima Tract was owned by (and takes its name from) George Shima, a businessman and farmer who at one point produced 85% of California's potato crop.