[1]Geographical Information and Technology Association web page
[2]http://www.esri.com/what-is-gis web page
[3]https://researchguides.library.wisc.edu/GIS web page
[4]https://www.gislounge.com/gis-data-a-look-at-accuracy-precision-and-types-of-errors/ web page
[5]https://www.nationalgeographic.org/encyclopedia/geographic-information-system-gis/
[6]Remote Sensing And Geographic Information System Data Integration: Error Sources And Research Issues
[Mrs.Anamika Raj,Lecturer King Khalid University.
Address: P.O. Lakhanpur, Tarapur,Bhagapur.Bihar]