Introduction to geostatistics

Geographical Information System (GIS) is a technological tool used to describe and characterize spatially referenced geographical information for the purpose of visualizing, querying and analyzing. The tool enables capturing, storing, analyzing, sharing, displaying and modelling of spatial data maintained with in single database. Making decision based on geography is basics to human thinking and spatial analysis using GIS enable people to combine information from many independent sources and derive entirely new layers of information that are more accurate and reliable in decision making. Spatial analysis involves study of phenomenon that varies with time and space.