Geography Study Materials and Hand-outs

  Terminology/Basic Questions  Related To GIS What is GIS Shapefile & Grids Vector & Raster DEM & TIN Coordinate Systems Classification of Coordinate Systems Other File Formats Raster or Vector ? DEM or TIN ? Other Basic Questions 1.1. GIS GIS      A  geographic   information   system  (GIS),  also  known  as  a geographical  information   system, is an information  system  for capturing, storing, analyzing, managing and presenting data  which are spatially referenced (linked to location) 1.2.Shape file & Grids Coverage   : In geographic  information  systems, a coverage  is a mapping of  one  aspect  of  data   in  space.  It  represents  a  "domain"  (the  universe  of extent)  in  terms  of   characteristics  expressing  a  range  of  values.  Aerial photography,   land  cover  data,  and   digital  elevation  models  are  all considered  coverage  data. Below are two types of coverage   which are used in GIS for representation of informat