3. GEOGRAPHIC INFORMATION TECHNOLOGIES
GIS: ONE OF THREE TECHNOLOGIES WHICH HAVE REVOLUTIONIZED THE HANDLING OF
SPATIAL OR LOCATIONAL DATA, WHICH IS THE FOCUS FOR GEOGRAPHY (AND MOST
ENVIRONMENTAL STUDIES)
1. GLOBAL POSITIONING SYSTEMS (GPS)
2. REMOTE SENSING (RS)
3. GEOGRAPHIC INFORMATION SYSTEMS (GIS)
4. GEOGRAPHIC INFORMATION SYSTEMS (GIS) ARE FUNDAMENTAL
TOOLS FOR LEARNING GEOGRAPHY. THEY PROVIDE A MEANS OF
ENQUIRING INTO GEOGRAPHY THROUGH MAPPING. BY
EXTENDING AND DEEPENING THE WAY THAT MAPS ARE USED TO
EXPLORE GEOGRAPHICAL ISSUES
WHAT IS GEOGRAPHY?
GEOGRAPHY IS THE SCIENCE OF LOCATION
WHAT IS WHERE AND WHY
Why?
?
Where?What?
5. GEOGRAPHIC INFORMATION SYSTEMS (GIS)
• A GIS IS A COMPUTERIZED TOOL FOR SOLVING GEOGRAPHIC PROBLEMS
• SOFTWARE SYSTEMS FOR INPUT, STORAGE, RETRIEVAL, ANALYSIS AND DISPLAY
OF GEOGRAPHIC (SPATIAL) INFORMATION
• WE ALL HAVE LATITUDE AND LONGITUDE
OPEN SOURCE GIS SOFTWARE : GRASS GIS
QGIS
ARCGIS
SAGA GIS
ILWISH
• GAVE US INEXPENSIVE MAP PRODUCTION/DISPLAY AND EASIER ANALYSIS
• DON’T NEED A PROFESSIONAL CARTOGRAPHER
• BUT STILL NEED ANALYSTS!
• IN GIS WE TALK ABOUT DIGITAL MAP (GOOGLE EARTH, BHUVAN, BING,
WIKIMAPIA, HERE ETC. )
6. THE UNIQUENESS OF GIS
USES EXPLICIT LOCATION ON EARTH’S SURFACE TO RELATE DATA
• BASE MAP IS AN IMPORTANT COMPONENT OF GIS SOFTWARE SO IT MUST HAVE
A CLARITY
• MOSTLY WE ARE USING GOOGLE AS A BASE MAP BECAUSE IT FREELY AVAILABLE
WITH INFORMATIVE DETAILS
• DUE TO TECHNICAL ADVANCEMENT GOOGLE IS PROVIDING 3D MAPS WHICH IS
VERY USEFUL
7. APPLICATION OF GIS
• GIS TECHNOLOGY FOR DISASTERS AND EMERGENCY MANAGEMENT
• EARTHQUAKE
• CYCLONE
• LANDSLIDE
• FLOOD
• FIRE
8. EARTHQUAKE IN NEPAL (25 APRIL 2015)
SECONDARY HAZARDS EXISTING IN THE EARTHQUAKE- AND AFTERSHOCK-AFFECTED
9. VERDHA CYCLONE IN CHENNAI
VERY SEVERE CYCLONIC STORM VARDAH IS ON ITS WAY TO MAKING LANDFALL CLOSE
TO CHENNAI
11. MOBILE MEDICAL CAMPS IN CHENNAI
ALL SCHOOLS AND COLLEGES REMAIN CLOSE
STATE GOVERNMENT HAS STOCKED 16,000
LITRES OF DIESEL AS FUEL BACK UP FOR
HOSPITALS
4,000 WORKERS TO REMOVE TREES
• 33 SPECIAL MEDICAL CAMPS
ESTABLISHED IN CHENNAI
• SOUTHERN RAILWAY CANCELS FIVE
TRAINS DEPARTING FROM CHENNAI
• ELECTRICITY TO BE RESTORED BY
EVENING
12. GIS APPLICATION TO PREDICT LANDSLIDE
LANDSLIDE HAZARD ANALYSIS AND MAPPING CAN PROVIDE USEFUL
INFORMATION FOR SUSTAINABLE LAND USE PLANNING
16. TRAGIC FLOOD IN
KEDARNATH
ISRO BELIEVES THAT THE DISASTER IN
UTTARAKHAND WAS AGGRAVATED BY
THE LARGE NUMBER OF LANDSLIDES IN
THE AREA BETWEEN JUNE16 AND 17