Also used to describe the actual data that are to be entered. An international network comprised of many possible dispersed local and regional computer networks in which one can share information and resources. Developed originally for military and then academic use, it is now accessible through commercial on-line services to the general public. An interpolation technique for obtaining statistically unbiased estimates of spatial variation of known points such as surface elevations or yield measurements utilizing a set of control points. Latitude is the north to south position.
Longitude is the east to west position.
Precise locations are described in degree, minutes and seconds. 50 seconds longitude. A yield map will contain a listing of yield values and the color denoting a range of yields. LIS refers to all aspects of handling the data such as collection, storing, checking, merging, manipulating, analyzing and displaying. An example would be physical and chemical data relating to a soil-mapping unit.