GIS And Remote Sensing

23 Asif Raza

Outline

Definition of Remote Sensing. How Remote Sensing Work Why remote sensing Important ?? Types of remote sensing Remote sensing process components Application of remote sensing.

Remote sensing system

Remote Means Far away. Remote Sensing mean sensing things from a distance.

The gathering of information from an object or surface without direct contact.

How Remote Sensing Work !! Remote Sensing capture radiation in

different wavelength reflected/emitted by the earth’s surface features.

RS provide valuable data over vast area in a short time.

Sensor

Object to be sense

dElectro Magnetic Radiation

Three Essential Things for Remote Sensing

Electromagnetic Spectrum

Remote Sensing used Energy at different wavelengths which are beyond the range of human vision (ultra-violet, infrared, microwave).

Why remote sensing Important ?

©2007 Austin Troy

Remote sensing plays a important role in GIS. Its images are used as the input data which are later put into shape files to create maps.

Types of Remote Sensing

1) Active Remote Sensing 2) Passive Remote Sensing

Active Sensing

Passive Sensing

Energy Source or Illumination (A)

Radiation and the Atmosphere (B)

Interaction with the Target (C)

Recording of Energy by the Sensor (D)

Transmission, Reception, and Processing (E)

Interpretation and Analysis (F)

Application (G) Source: Canadian Centre for Remote Sensing

Remote Sensing Process Components

Applications Of Remote Sensing

There are Many Applications of Remote Sensing Some of Following are listed

in presentation.

Application of RS: Crop Growth Monitoring

Application of RS: Forest Monitoring

Application of RS: Urban Heat Island Monitoring

Application of RS: Disaster Management

Application of RS: Water

Application of RS: Flood Mapping

Application of RS: Military Use

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