History of Mediaeval Hindu India (being a History of India from 600 to 1200 A.D.) v3.c35.s1.21

v3.c35.s1.21

But Rājarāja I was not only a great conqueror and a great builder but also a great administrator. South India is known from ancient times for its irrigation works but the great works of irrigation from the Kauveri were built by Rājarāja I. He also surveyed and settled the country in 1011 A. D. The survey and settlement was so minute that "even 52, 428, 800, 000 of a Veli was measured and assessed for revenue" (Aiyar p. 249). This establishes the reputation of the revenue administrators and mathematicians of those days in South India a reputation still possessed by its administrators and mathematicians. Dr. Smith mentions a revenue survey undertaken by a successor of Rājarāja in 1086 A. D., the date of the Doomsday register in England (E. H. I. p. 486 3rd Edn).