Data gathering for 2011 Census began with house listing at the District Collector M.Ravi Chandra's official residence here on Monday. Information collected about each house-hold should be accumulated as the National Population Register (NPR). On the occasion, Mr. Ravi Chandra called upon the people to provide accurate and detailed information to the enumerators to ensure that the NPR was comprehensive and could be relied upon to the full extent for various purposes. The compilation of data for NPR was being conducted in two phases. The first one containing house listing was to be done from April 26 to June 10. The second phase was scheduled to be held in February 2011. The NPR would be helpful for security purposes as it would contain the country's complete demographic profile. Identity cards will be issued to the citizens on the basis of NPR. Each enumerator was permitted to visit 150 houses and prepare a database for each family containing 35 points. A total of 8,889 enumerators and 1,481 supervisors are put on the job. Later, enumerators collected information about Joint Collector K.Sasidhar at his residence. Kakinada municipal commissioner GSN Murthy, town planning officer V.Satyanarayana, Census 2011 district in-charge Balla Reddy, population counting officers P.Rama Rao and V.C. Sekhar, enumerator K.V. Seshagiri, supervisor D. Srinivasa Rao and others were present.