A GIS is a particular form of Information System applied

to geographical data.

An Information System is a set of processes, executed on

raw data( Longitude, Latitude) to produce information

which will be useful when making decisions.

A system is a group of connected entities and activities

which interact for a common purpose.

GIS is a System of computer software, hardware

and data, and personnel to help manipulate, analyze

and present information that is tied to a spatial location

• spatial location – usually a geographic location

• Information – visualization of analysis of data

• System – linking software, hardware, data

• Personnel – a thinking explorer who is key to the

power of GIS

sis

Get spatial & attribute data into the GIS. Here we collect preprocess data from various sources.

Organize data for retrieval and editing. This subsystem allows we to manage, view, and edit our datasets.

Create thematic maps, models, and statistics.

Perform tasks on data. With this subsystem, we conduct spatial analysis to create information

CaptureData

RegisterMap Base

InterpretData

Convert Datato DigitalFormat

Store Datain Computer

ProcessData

DisplayResults

GIS on the Internet

• Olympics

— http://citymap.cityofsydney.nsw.gov.au/

• National Geographic Map Machine

— http://www.nationalgeographic.com/maps.index.html

• Find a Home — http://www.realtor.com

• ATM Locator — http://www.visa.com

• Store Locator — http://www.godiva.com

• GIS Info — http://www.gis.com