Total expenditures for all types of surveys on a worldwide basis during 1968 were up one percent from 1967. Expenditures for petroleum exploration were down one percent; for mining, up 28 percent; for groundwater, engineering, and construction up 62 percent; and for oceanographic surveys, up 325 percent. The United States led in petroleum exploration, followed by Africa; Canada led in mining exploration, followed by the United States; and the United States led in groundwater, engineering, and construction exploration, followed by the Far East. Seismology led in data gathering by 92.7 percent of the total, and in general, total crew-months of geophysical surveys for petroleum exploration were down 14 percent from 1967.

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