introduction to remote sensingintroduction to remote sensingdrm.cenn.org/trainings/remote...

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Training CourseRemote Sensing – Basic Theory & Image Processing Methods19 – 23 September 2011

Introduction to Remote SensingIntroduction to Remote SensingIntroduction to Remote SensingIntroduction to Remote SensingMichiel Damen Michiel Damen (September 2011)(September 2011)

[email protected]@[email protected]@itc.nl

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Course: Remote Sensing – Basic Theory & Image Processing Methods - 19 - 23 September 2011

OverviewOverview

Some definitions

R t i hi t Remote sensing history

Examples of remote sensing images

Remote sensing sensors – passive & activeg p

Electro magnetic spectrum

Remote sensing platforms

Spatial data acquisition

Questions

Michiel Damen, ITC

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Remote Sensing

Remote Sensing is the art, science and technology of observing an object scene, or

Remote Sensing

phenomenon by instrument-based techniques.

Remote: because observation is done at a distance without physical contact with the object of interestwithout physical contact with the object of interest

Sensing: Detection of energy, such as light or another form of electromagnetic energy

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Remote sensing historyRemote sensing history

1858!

First ERTS-1 imageDallas, 23 July 1973.


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Remote sensing data

Geospatial data acquisition (GDA): Collection, processing and analysis of data for various

Remote sensing data

, p g ypurposes:

- Water management- Land management- Resource management, etc.

Data :representations that can be manipulated by a computer

Information :interpreted data “GEO”: geodetically

defined coordinate system


system

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Remote sensing imageg

Bandung, Indonesia


Bandung, IndonesiaASTER R G B : 3N 2 1

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Remote sensing imageRemote sensing image

Dehradun, IndiaLandsat ETM


R G B : 4 5 3

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Remote sensing imageRemote sensing image

Yellow River delta, ChinaLandsat ETM


Landsat ETM R G B : 4 5 3

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Remote sensing sensors

Passive sensorscollect electromagnetic radiation in the visible and infra-red

Remote sensing sensors

gpart of the spectrum:

- Aerial Photographs - Low resolution: Landsat, ASTER, SPOT, IRS - High Resolution: Quickbird, IKONOS

Active sensors :generate their own radiation:g

- Air-borne radar- Space borne radar: ERS 1 / 2, Radarsat- Lidar (laser scanner)


( )- Shuttle Radar Topography Mission Data (SRTM)

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Remote sensing spectrumRemote sensing spectrum


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Satellite platform : 700 - 800 km above the earth surface Aeroplane


p Helicopter Microlight Kite

F h SPOTF h SPOT


French SPOT French SPOT SatelliteSatellite

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Remote sensing data steamsEnergy Source SatComSensor

Remote sensing data steams

Application

Target


Processing Station Analysis

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Remote sensing satellite orbitRemote sensing satellite orbit

Ground tracksSun synchronous Landsat satellite


Figures: Drury, Image Interpretation in Geology

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Spatial data acquisitionSpatial data acquisition

Ground based methodsMaking field observations, taking in-situ measurements.g , g

Remote sensingMethods are based on the use of image data acquired g qby a sensor, such as aerial camera’s scanners or radar.


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Ground based methodsMaking field observations, taking in-situ measurements.


g , g


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Spatial and temporal aspectsSpatial and temporal aspects

L d t MSS 1972Landsat MSS 1982

ASTER 2003

Landsat MSS 1972Landsat MSS 1982

ASTER 2003Landsat MSS 1972

Solo River delta, Indonesia


Indonesia

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Spatial data acquisitionSpatial data acquisition

Ground based methodsMaking field observations, taking in-situ measurements.g , g

Use of Mobile GIS


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Remote Sensing methods are based on the use of image data acquired by a sensor, such as aerial


g q y ,cameras, scanners or a radar.

observation andreal world sensor image data spatial database

observation andmeasurement

remote sensing based approach


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Ground based vs. Remote Sensing based


spatial databaseobservation andmeasurementreal world

observation and

ground based approach

real world sensor image data spatial databaseobservation andmeasurement


remote sensing based approach

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RS sensors can be divided into passive and activesensors


sensors

Passive sensors detect EM radiation in the visible and IR part of the spectrum

Active sensors (radar) generate their own radiation

There exist different RS platforms: space-borne, air-borne (plane, helicopter, micro-light)borne (plane, helicopter, micro light)

For analysis of the RS images is also ground checking needed


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Applications of remote sensing

Question :

H i t i d i

Applications of remote sensing

How is remote sensing used in your organization?

Kind of RS data (sensors etc.)

Software used

Created output

G I S


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