What does ETCF mean in Unclassified?

East Texas

East Texas is a distinct cultural, geographic and ecological area in the U.S. state of Texas. According to the Handbook of Texas, the East Texas area "may be separated from the rest of Texas roughly by a line extending from the Red River in north central Lamar County southwestward to east central Limestone County and then southeastward towards eastern Galveston Bay", though most sources separate the Gulf Coast area into a separate region.Another popular, somewhat simpler, definition defines East Texas as the region between the Trinity River, north and east of Houston, (or sometimes Interstate 45, when defining generously) as the western border, the Louisiana border as the eastern border, the Gulf of Mexico as the southern border, the Oklahoma border as the northern border, and extending as far south as Orange, Texas. The East Texas Regions includes Tyler, Longview Lufkin, Marshall, Palestine, Jacksonville, Mount Pleasant, and Nacogdoches. Most of the region consists of the Piney Woods ecoregion, and East Texas can sometimes be reduced to include only the Piney Woods. At the fringes, towards Central Texas, the forests expand outward toward sparser trees and eventually into open plains.

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