Unit Outline Resources
Transcript of Unit Outline Resources
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ENV202/502 – Introductory Remote Sensing Wk 1
Dr Karen Joyce
School of Environmental and Life Sciences
Bldg Purple 12.3.091
Lecture 1 – Introduction to Remote Sensing
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Lecture Outline
• Introductions
• Unit admin
– Unit outline
– Practicals
– Assessment
– Learnline
• The what, why, and how of remote sensing
• History of remote sensing
• Common applications
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Unit Outline
• Introduction to remote sensing
• Understanding electromagnetic radiation interactions
• Radiation transfer theory
• Aerial photography and image analysis
• Digital image processing (3 weeks)
• Multispectral and hyperspectral imagery
• Object oriented information extraction
• RADAR and LiDAR
• Applications and operational projects
• Unit summary
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Resources
• Jensen, J (2007) Remote Sensing of the Environment: An Earth Resource Perspective, 2nd
Ed., Upper Saddle River, NJ: Prentice Hall, 592 pages
• Thomas M. Lillesand, Ralph W. Kiefer, Jonathan W. Chipman (2008) Remote Sensing and Image
Interpretation, 6th Edition. John Wiley & Sons, Hoboken, NJ. ISBN 9780470052457 . Chapters 1 & 4
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Practicals
• All held in Purple 12.3.17 (After hours swipe access to 12.1.28)
• Designed to expand on lecture materials and provide ‘hands on’ learning
• Software in use will be ENVI/IDL
• Practicals 2, 3, and 4 will be assessed
• Field trip – 28th March, Litchfield National Park
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Assessment
• All assessment items are compulsory
• Due by 11.59pm on the given date
• To be submitted via Learnline
• Advise lecturer well in advance if you are having difficulties
• Penalty of 10% per day for late submissions
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Assessment Items
• Practical exercises
– 3 assessable practicals
– Short / paragraph answers
– 20% ea
• Application project
– Select an environmental problem of interest and design
a remote sensing mapping and monitoring solution
– 3000 words (5000 words for ENV502)
– 40%
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Related Units
• ENV101 – Earth Systems
• ENV203 – Environmental survey and monitoring skills
• ENV208/508 – Applied Geographic Information Systems
• ENV305/505 – Catchments to Coasts
• ENV306/506 – Environmental monitoring and modelling
• ENV304/504 – Field studies in tropical and desert landscapes
• SID300 – Professional practice in applied science
• SID301 – Research Project
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Learnline Demo
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What is Remote Sensing?
• The science and art of obtaining information about an object, area, or phenomenon, without being in direct
contact with the feature under investigation…
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Weather Forecasting
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Sea Surface Temperature
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Ocean Colour and Vegetative Cover
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Coral Cover
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Dust – SW Queensland
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Vegetation Monitoring
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Digital Elevation / Bathymetry Models
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Volcanic Eruptions – Gas Emissions
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Volcanic Eruptions – Hunga Tonga
500m
25 Mar 09 Photos: NZAID14 Nov 06
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Volcano Monitoring – Temperature
ASTER Thermal
Imagery of Mt
Ruapehu
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25 Mar 07
9 Feb 02
Volcano Monitoring – Lahar Mapping
ASTER Imagery of Mt
Ruapehu
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Earthquakes and Deformations
Source: S.Samsonov
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Minerals and Geology
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Counting Landslides
BEFORE AFTER
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1km ENV202/502 – Introductory Remote Sensing Wk 132
Other Applications
• National Security
• Landcover / land use
• Infrastructure mapping
• Oil and gas
• Telecommunications
• Online mapping
• Personal navigation
• Construction, survey
• Agriculture
• Forestry
• Water resources
• Insurance
• Disaster relief
• Environmental monitoring
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History of Remote Sensing
• Birth of photography (1839)
• Photography from Balloons
(1850-1900)
• Photography from aircraft
(1909)
• First World War (1914 –
1918)
– Aerial scouting and reconnaissance
• The discipline of
photogrammetry was
established (1920’s)
US Army Balloon Corps, early 1860s
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History of Remote Sensing
• Radar developed (1930’s)
• Second World War (1939 – 45)– Colour infra-red film used to detect
camouflage
• The Cold War (1945 -91)• Colour infra-red photography used to
detect crop disease
• The term ‘remote sensing’ was first used (early 1960’s)
• Space Race - Rockets & Satellites (60’s and 70’s)
• Commercial (i.e. civilian) Satellites (July 72 to date)
• Digital image processing
Boston, 1860 - taken from balloon
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History of Remote Sensing
• Landsat 5 (1984) 25 years of operation & counting - original
intended mission only 3yrs!
• Landsat 7 (1999)
• High spatial resolution satellite imagery IKONOS (1999) &
Quickbird (2001)
• First satellite hyper-spectral sensor
EO-1 (2001)
• LiDAR
• Google Earth brings remote
sensing to everyone with internet access (2005)
• Landsat archive freely available (2009)
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How Does Remote Sensing Work?
• Any object with a temperature >0o Kelvin emits electromagneticradiation (EMR)
• Sunlight is a form of EMR
• Thermal energy (heat) is a formof EMR
• EMR from the sun is
– Reflected
– Transmitted
– Absorbed
• Reflected and/or emitted energyis recorded by a sensor
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How Does Remote Sensing Work?
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EMR Interactions
• Types of interactions observed in imagesare controlled by:
– Physical, Chemical and Biological
characteristics of object; and
– Type of sensor
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From Images to Information
• Understanding EMR interactions with features of interest allows qualitative and quantitative analysis of
images
• Maps are created by developing relationships
between EMR (as recorded in an image) and features of interest (as measured on the ground)
Water
Grasses etc
Dense Veg
Artificial Surfaces
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The Remote Sensing Process
Source: Lillesand, Kiefer & Chipman (2008)
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Satellites
In Google Earth just go to
"Add"->"Network Link" and paste link into the "Link:"
field.http://modop.webhop.org/s
ats/mysatsensors.kml
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Why Use Remote Sensing?
• Large area coverage
• Synoptic view, continuous spatial coverage
• Information about hard to access areas
• Use sensors to ‘see’ in wavelengths not visible to human eye
• Make quantitative measurements about biogeophysical properties of earth’s surface
• Digital record of features and processes
• Repeat coverage
• Cost (field vs. image)
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Who uses remote sensing?
• Military
• Many Government Departments
• Commonwealth Agencies (CSIRO, ERISS, etc)
• City Councils
• NGOs
• United Nations
• Private industry (SKM, EWL, ERA etc)
• Universities and research agencies
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Coming Up
• First Practical – This Friday 9-12pm
• Lecture next week: Understanding electromagnetic radiation (EMR) interactions
• Respond to email RE field trip
Source: C.Roelfsema/S.Phinn