data input - Real world data must be captured and converted to digital format in order for it to be analysed and manipulated by a GIS. Various methods exist and fall into two categories (1) primary and (2) secondary. Primary data is captured and directly input into the system e.g. via remote sensing or GPS. Secondary data comes from an intermediate source, e.g. paper maps or photos. In this case the data is input via digitisers, scanners or stereoplotters. Data input raises the issues of accuracy and error, of both equipment and human operators;
дс тдрлими цюлютдажкию дроемжки аиакиохдйис лидр
http://www.geo.ed.ac.uk/agidexe/term;
