1.
1
By
L. Harish Kumar
Roll No: 117R1A0132
CMR Technical Campus
harish.ce2015@gmail.com

2.
1
A Geographic Information System (GIS)
is a computer system for capturing,
storing, checking, analyzing, managing
and displaying present all types
of geographical data.

3.
Remote sensing is the science and art of
obtaining information about an object,
area or phenomena, through the analysis
of data, acquired by a device, that is not
in contact with the object .

4.
 The first known use of the term ‘Geographic
Information System’ was by Roger
Tomlinson in the year 1968 in his paper ‘A
Geographic Information System for Regional
Planning’. Roger Tomlinson is also
acknowledged as the ‘Father Of GIS’.

5.
1
Software,
Hardware
Geographic information data
Application
People

6.
 Resource management
 Environmental impact assessment
 Land use planning
 Water and Sanitation Mapping
 Transportation routing
 Water and Rivers distributions
 Recreation resources
 Floodplains
 Wetlands
 Agricultural lands
 Aquifers
 Forests
 Etc...........

7.
Types of data sources and the representation of data

8.
Technical Inputs
• Aerial Photographs / Satellite Images
• Remote sensing data analysis
• Database
• GIS representation of basic data
• DEM/DTM analysis
• Other ancillary data

9.
• Geo-stationary satellites provide continuous and
synoptic observations over large areas on weather
including cyclone monitoring.
• Polar orbiting satellites have the advantage of
providing much higher resolution imageries, even
though at low temporal frequency, which could be
used for detailed monitoring, damage assessment
and long-term relief management.
• Advancements in the Remote sensing technology
and the Geographic Information Systems help in real
time monitoring, early warning and quick damage
assessment of both drought and flood disasters.

10.
• RASTER
• VECTOR
• Real World

11.
 Vector
 A series of x,y coordinates
 For discrete data represented as points, lines,
polygons
 Raster
 Grid cells
 For continuous data such as elevation, slope,
surfaces

12.
12
 Vector model
 Raster model
point
1,6
2,5
5,4
4,1
7,10
5,9
4,7
6,6
8,6
9,8
line
polygon
2,2
5 10
5
10
as geometric objects:
points, lines, polygons
as image files
composed of grid-cells
(pixels)

13.
Stand Types Hydrology Roads Composite LayersTopography
GIS Theme Overlay.
MAP OVERLAYTheme Overlay

14.
Google Earth
(Capturing Data )
Arc GIS
( Analyzing Data)
Global Mapper
( Editing Data )

15.
Resolutions
•Spatial Resolution
•Spectral Resolution
•Radiometric Resolution
•Temporal Resolution

16.
APPLICATIONS OF REMOTE SENSING
•Preparation of Geology and Geomorphology mapping
•Soil Mapping
•Water resources
•Agriculture (crops)
•Forestry and vegetation mapping and
•Land use mapping
•Etc……

17.
Schematic representation
Satellite Data TopomapsAncillary Information
Interpretation
(validate)
LU/LC Map
Drainage
Map
Contour
Map
DEM
Slope
Map
Ordered
Drainage
Map
Watershed Boundary
Soil, Geology &
Geomorphology Maps
Hydrologic Soil Group
Curve No. / Classes
Logical Operations &
Decision Rules Output Map
for WHS

18.
Land Use / Land Cover in Water Resources
Surface Water Mapping and Inventory
Rainfall - Runoff relationship
Flood & Drought impact assessment & monitoring
Watershed Management for sustainable
development
Conclusion Cont.

19.
 The remote sensing and GIS technology significantly contributes in the
activities of all the three major phases of drought and flood
management namely,
1. Preparedness Phase where activities such as prediction and risk zone
identification are taken up long before the event occurs.
2. Prevention Phase where activities such as Early warning/
Forecasting, monitoring and preparation of contingency plans are taken
up just before or during the event and
3. Response/Mitigation Phase where activities just after the event
includes damage assessment and relief management.
 In this lecture, brief review of remote sensing and GIS methods and its
utilization for drought and flood management are discussed.