Masih berada pada 1964. Antara perkembangan surveying di Amerika Syarikat adalah; 1964 Berlaku gempa bumi di Alaska. [Major response to Good Friday Alaska Earthquake]. 1961-1976 Transcontinental Traverse (TCT) conducted to improve the scale of the network for the space program with an accuracy of 1:1,000,000 Source: ngs noaa - link . Alaska Earthquake 1964 source: history dot com - link - - - - - - - - - -