Geographic Information System - 02

Components of GIS

       Following are the components required to fulfilled GIS task. All these components of GIS are equally important and none of them can be disregarded in a perfect GIS system.  

A system of computer hardware, software, and procedures designed to support the capture, manipulation, analysis, modularity and display of spatially referenced data for solving complex planning and management problems

Characteristics of GIS

•       Collect, store and retrieve info based on its spatial locations.

•       Identifying location within a targeted environment which meet specific criteria

•       Explore relationships among data sets within that environment.

•       Analyze the related data spatially as an aid to making decisions about that environment.

•       Facilitate selecting and passing data to application specific analytical models capable of assessing the impact of alternatives on the chosen environment.

•       Display the selected environment both graphically and numerically either before or after analysis 

Why GIS?

Gis provides a tool to functions and analyis DATA and its VISUALIZATION.

        Data - “Not Easy to Interpret”

        Visualization - “Worth a Thousand Words”

WHAT is GIS?

GIS hold geospatial features such as Geo Database view and GeoMap view

GIS as a Database View

A GIS is a unique kind of database of the world i.e. geo database. Fundamentally, a GIS is based on a structured database that describes the world in geo terms.

GIS as a Map View

A GIS is a set of intelligent maps and other views that show features and feature relationships on the earth's surface. Maps of the underlying geo info can be const and used as "windows into the database" to support queries, analysis, and editing of the information. 

GIS data Model

Geographic Information Technologies

           

Geographic Information System (GIS) system is a composite technology beginning with the digital landscapes. It divided in to three main categories.

           

Global Positioning system (GPS)

            Remote Sensing (RS)

            Geographic Information System (GIS)

What is Global Positioning system (GPS)

Global positioning system refers to a system of satellites and receivers that allow people and devices to pinpoint their precise location on the earth. GPS as it relates to GIS work, as well as GPS attribute inputs and interactive GPS relay. GPS has become a major component of GIS and will continue to be an essential Input for fieldwork.

Remote Sensing (RS)

Remote sensing is Science and Art of a technique or other word it can be define as what is there without going there. This system refers to techniques that use sensors to acquire data/information about objects not in contact with (distant from) the viewing instrument.     

Geographic Information System (GIS)

GIS is a Special kind of computer based technology and methodology for collection, managing, analyzing, modeling, and presenting geographic data for a wide range of applications. GIS use for most of the advanced computer mapping systems. GIS stand for

Geographic: The real world; spatial realities.

Information: Data and Information; their meaning and use.

System: Computer technology and its support infrastructure.

          This system allows users work in set of computer tools that allows to work with data that are tied to a particular location.

Why GIS is a Special kind of application?

            GIS allows users to store attributes with their locations or it has spatial data and attribute data. GIS is more than just software, it refers to all aspects of managing and using digital geographical data.