A geographic information system (GIS) is a computer-based tool for collecting, storing, analyzing and displaying spatial or geographic data. It integrates technologies like remote sensing, database management systems and computer-aided design. GIS helps solve geographic problems by allowing users to view, understand, question, interpret, and visualize data in many ways to reveal relationships, patterns, and trends. Examples of GIS applications include risk assessment, transportation systems, infrastructure planning, and natural resource management.

1. Geographic Information System
 A computer-based system to aid in the
collection, maintenance, storage, analysis,
output, and distribution of spatial data
and information (Bolstad, 2002)
GIS
Md. Yousuf Gazi, Lecturer, Department of Geology, University of Dhaka (yousuf.geo@du.ac.bd)
 Any manual or computer based set of
procedures used to store and manipulate
geographically referenced data (Aronoff,
1989).

2. Md. Yousuf Gazi, Lecturer, Department of Geology, University of Dhaka (yousuf.geo@du.ac.bd)
• It is a Tool, a science, a software and a
marriage between computer cartography and
database management.
• It can tell you what is where and why?
• It can model change over time.
 A container of maps in digital form.
 A computerized tool for solving
geographic problems.
 A spatial decision support system.
.
GIS

3. GIS
Md. Yousuf Gazi, Lecturer, Department of Geology, University of Dhaka (yousuf.geo@du.ac.bd)
Computer Aided
Cartography
(CAC)
Remote Sensing
(RS)
Computer Aided Design/
Drafting
(CAD)
Database
Management
Systems
(DBMS)
GIS
Integrated Technologies

4. GIS
Md. Yousuf Gazi, Lecturer, Department of Geology, University of Dhaka (yousuf.geo@du.ac.bd)
Risk assessment
• Natural disasters, disease infection, etc.
Transportation systems
• Highways and interstates, subway and bus routes
Infrastructure
• Power grids, sewage, water and gas lines
Natural resource management
 Resources inventory (what is available at
where?)
 Network Analysis (How to get to a place
in the shortest amount of time?)
 Location Analysis (Where is the best
place to locate a shopping mall?)
 Terrain Analysis (What is the danger
zone for a natural disaster? Visibility
analysis)
 Spatio-Temporal Analysis (Land use:
what has changed over the last twenty
years, and why?)

5. GIS
Md. Yousuf Gazi, Lecturer, Department of Geology, University of Dhaka (yousuf.geo@du.ac.bd)
Risk assessment
Flood Hazard Map of North-Eastern Part of Bangladesh (Gazi et al. 2018)

6. GIS
Md. Yousuf Gazi, Lecturer, Department of Geology, University of Dhaka (yousuf.geo@du.ac.bd)
Transportation systems
Emergency referral transport system for suspected sepsis
patients in Bangladesh (Chowdhury et al. 2018)

7. GIS
Md. Yousuf Gazi, Lecturer, Department of Geology, University of Dhaka (yousuf.geo@du.ac.bd)
Main pipe network of the water supply
in Dhaka city
Source: Survey of Bangladesh (sob)
Infrastructure

8. GIS
Md. Yousuf Gazi, Lecturer, Department of Geology, University of Dhaka (yousuf.geo@du.ac.bd)
Future development of natural resources
and high-value wildlife habitats in boreal
landscapes in a area near to northeast
British Columbia, Canada (Suzuki and
Parker, 2016)
Natural resource management

9. GIS
Md. Yousuf Gazi, Lecturer, Department of Geology, University of Dhaka (yousuf.geo@du.ac.bd)