Presentation Transcript
Introduction to GIS :Introduction to GIS Definition of GIS:
A broadly accepted definition of GIS is the one provided by the united states geological survey(USGS-1997)
“A GIS is a computer based system capable of capturing,storing,analysing and displaying geographical referenced information”
Data for GIS Applications :Data for GIS Applications Digitised and scanned data
Databases
GPS field sampling of attributes
Remote sensing and aerial photography
Representation of data in raster and vector form :Representation of data in raster and vector form
GIS Applications :GIS Applications Mapping locations
Mapping quantities
Mapping densities
Finding distances
Mapping and monitoring change