Report 247 By C.R. Baskin | May 1980

• Report 247 - Modern Topographic Mapping of Texas
• Figure 1 - Status of Topographic Mappign in Texas December 31, 1978
• Figure 8 - Authorization Dates of 7 1/2-Minute mapping in Texas, 1947-1978
• Figure 9 - Completion Dates of 7 1/2-Minute mapping in Texas, 1949-1978