What is GIS 
GIS is a computer based system with multi disciplinary and integrated approach that can accept large volume of spatial data derived from a variety of sources and to effectively store, retrieve, manipulate / analyse, display and generate out put according to user defined specifications useful for decision making in a wide range of fields.

What GIS can do?
Setting up a new retail oulet, finding the best soil for growing mangoes, locating a warehouse, figuring out the best route for an emergency vehicle, how/where to lay telephone/power cables etc. Which area of a country is overpopulated? What is the extent of Deforestation? What are the areas prone to natural disasters? All these questions have one thing in common - Geographical component and GIS provides such information. A full functioning GIS will help find solutions to all these and more! 

Photogrammetry 
Photogrammetry is the science and art of obtaining reliable measurements to determine primarily geometric characteristics, such as size, form and position of the photographed object.

GIS Related Technologies
Geo Information (GI) Technologies are making an impact on all aspects of growth and development. It has been established that GI Technologies are essential inputs in all planning and developmental strategies. Geographic Information Systems (GIS), Remote Sensing, Photogrammetry, GPS provide inputs to design and develop GI database. This can further be used for applications in facility management, town planning, infrastructure development, mineral exploration, transportation engineering and also business geographics including marketing, location analysis and customer relationship management. Thus GIS has emerged as a Management System useful for a wide spectrum of application fields