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Introduction to Remote sensing and...
Transcript of Introduction to Remote sensing and...
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Introduction to Remote sensing and
applications
Introduction to Remote sensing and
applicationsPresent by:
Weerayuth Suanpagaอ.วีระยุทธ สวนผกา
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Contents
Applicationof
Remote Sensing
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Advantage of RS• Wide Coverage, Periodical Observation• Variety of Observing Method• Multi-resolution – Multi-temporal –
Multi-spectral• Global Environment – Local Application• Hydrology, Oceanography, Global Env.Study, CO2
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Advantage of RS con’t• Agriculture, Forestry, Fisheries, Ecological Mapping• Coastal zone management, Health Management,
Energy• Fire, Oil-spill, Volcano, Earthquake, Flood, Ice,• Land use mapping, Cadastral Mapping, Topographic
Map, Change Detection• Military• Use wisely by understanding advantage and
limitation
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Recent an example of RS application
1. Remote Sensing (LIDAR) for Management of HighwayAssets for Safety
2. 3D Model of University of Melbourne Campus3. NOAA/AVHRR -MODIS/TERRA Reception, Archiving
and Distribution4. Forest Fire Monitoring from NOAA AVHRR5. MODIS for Flood Monitoring6. Landuse Classes and its Multi-temporal Spectral Curves7. planting pattern detection8. Forest Fire Monitoring from NOAA AVHRR-Thailand9. Defense Meteorological Satellite Program[DMSP]10.Rice Growth Monitoring using RADAR Remote Sensing
0 Base map/Back Ground map integrate with web-map server
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Recent an example of RS application11. RS for Drought Monitoring(using NOAA AVHRR) in Indonesia12. Soil-Water-Atmosphere-Plant Model (SWAP)13. Soil Erosion Monitoring14. Tea yield Model15. Mt. Mayon Volcano Comprehensive Disaster
Prevention Master Plan16. Flood Monitoring using JERS17. Bangkok Urban Area Expansion18. Micro Air Vehicles (MAV)19. GPS20. Debris flow21. Landform Classification Method for Earthquake Damage
Estimation
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Base map Web map server
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Remote Sensing (LIDAR) forManagement of Highway Assets for
Safety
Iowa State University ~ University of Missouri-ColumbiaLincoln University ,University of Missouri-Kansas CityUniversity of Missouri-St. Louis,University of Northern Iowa
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Main objectiveUtilize light detection and ranging (LIDAR) technology toobtain highway safety-related information.The safety needs of older drivers in terms of prolongedreaction times were taken into consideration.
(1) identification of crashes that older drivers aremore likely to be involved in,
(2) identification of highway geometric features thatare important in such crashes
(3) utilization of LIDAR data for obtaininginformation on the identified highway geometricfeatures
(4) assessment of the feasibility of using LIDARdata for such applications.
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Sight triangles for Case B1,left turn from the minor road
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The distance of the detected potential obstructions refersto the distance of the blue dots obtained during the line-of-sight analysis fromthe driver stopped on the minor road
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summary-66 potential sight distance obstructions identified by the line-of-sight
-The intersection with the highest crash frequency involving olderdrivers was correctly found to have obstructions located within theintersection sight triangles.
-LIDAR data can be utilized for identifying potential sight distanceobstructions at intersections. The safety of older drivers can beenhanced by locating and rectifying intersections with obstructionsin sight triangles.
$30,000 was spent
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20MODIS Installation 22nd May 2001, AIT
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MODIS for Flood Monitoring
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Historical TM image1989 TM
Planting pattern detection
8 Years Later1997 TM
Recent TM image for the TREES test site 125/61 on SumatraThe TM image from 18 August 97 shows new oil palm plantation areas, partlyestablished by replacing old plantations, partly by conversion of forests.
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Forest Fire Monitoring fromNOAA AVHRR-Thailand
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During the period of 4-16 July 2000, many fires weredetected in Sumatra and Kalimantan of Indonesia.
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Rice Growth Monitoringusing RADAR Remote Sensing
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Rice Growth Monitoring UsingNear Real Time RADARSAT Fine Beam SAR
Data in Pathumthani
Deployment sites ofcorner reflectors, plottedOn ADEOS AVNIR image
Canada – Japan – ThailandWithin 8 hrs after reception
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Soil-Water-Atmosphere-PlantModel (SWAP)
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Soil moisture measurement
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Remote Sensing for Coastal Zone ManagementShrimp Farm extension in Chantaburi(1987- 1995)
February 1987:LandSat-TM August 1997: ADEOS-AVNIRRemote Sensing for Coastal Zone Management Shrimp Farm extension in Chantaburi(1987- 1995)Extent of shrimp cultivation increase within ten years period in Chantaburi coastal area is clearlyvisible. Area shown within yellow square/circle in 1997 image are the area converted to shrimp farms.
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Soil Erosion Monitoring
NDVI Map(Normalized DifferentialVegetation Index )
Soil Erosion MapSoil Erosion rate0.91 mm/year
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Develop a model to find the correlation between LAIand NDVI derived from spectrophotometer readings
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Mt. Mayon Volcano ComprehensiveDisaster Prevention Master Plan
GIS DataDevelopment forPlanner• Historical Riverplanform Change bylava, pyroclastic flow,lahar• Sediment ProductionEstimation for riverstructure planning
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Lava Deposit of Mr. Mayon(Pawa Burabod riverbed)
Estimation of Lava Deposit Height using SAR InterferometryINSAR result Topographic difference
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Flood Monitoring using JERSSAR 12 Scenes Mosaic
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Bangkok Urban Area Expansion1988 - 1999
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Urban extent from 1988 to 1999 usingclassified Landsat TM
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Military
Micro Air Vehicles (MAV)
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GPS
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Global Navigation Satellite Systems (GNSS)
• NAVSTAR– USA
• GLONASS– Russians
• Galileo– Europeans
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How GPS works?
• Range from each satellite calculatedrange = time delay X speed of light
• Technique called trilateration is used to determine you position or “fix” – Intersection of spheres
• At least 3 satellites required for 2D fix • However, 4 satellites should always be used
– The 4th satellite used to compensate for inaccurate clock in GPS receivers
– Yields much better accuracy and provides 3D fix
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Three SV ranges known
20,000 Km radius22,000 Km radius
21,000 Km radiusLocated at one of these 2 points. However, one point can easily be eliminated because it is either not on earth or moving at impossiblerate of speed.
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Debris flow
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Characteristics of R/S
• Wide Area global 1 scene 185*185km• Quick 1 scene in 25sec• Multi Temporal Every 16days• Multi Spectral 8 bands• Computer fit digital data - algorithm• Map Projection UTM• Example of Landsat 7 Satellite
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Trade-off in Performance• Spatial Resolution( 1 observation unit on ground surface )
• 30 m - 250km - 1km• Temporal Resolution• 16 days - 1day• Spectral Resolution• 7 channel vs 36 channel• Observation Extent– 185 km vs 2,300km• S/N– 8bits vs 10bits• cost– 1 scene 800US$ vs Free ( Broadcast )
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Advantage of RS• Wide Coverage, Periodical Observation• Variety of Observing Method• Multi-resolution – Multi-temporal – Multi-spectral• Global Environment – Local Application• Application Field• Hydrology, Oceanography, Global Env. Study, CO2• Agriculture, Forestry, Fisheries, Ecological Mapping• Coastal zone management, Health Management, Energy• Fire, Oil-spill, Volcano, Earthquake, Flood, Ice,• Land use mapping, Cadastral Mapping, Topographic Map,Change Detection• Military• Use wisely by understanding advantage and limitation
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Limitation
• Spatial Resolution• Geo-location• Data Handling
Format: Local formatNot enough Support fromcommercial software
Projection• 10bits data• Difficulty in implementing local
processing• system• Off-Nadir Observation• Strong Effect of Bi-directional
Reflectance• BRDF
Limitation of High-ResoRe-Visit Time
2 – 18 daysCloud Cover Project planningSpectral Information
Panchromatic to several bands onlyS/N
Normally 6-8 bitsGeo-location Distortion bytopographic effect( edge, highmountains)
Off-Nadir Observation CoverageSeveral 10km –180km
Cost Usually not freeSometimes expensive Super-high
reso: ExpensiveSatellite GeometryModel: sometimes not open
High resolution Low resolution
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Advantage :High and low resolution satellite
High Multi-TemporalGlobal CoverageMulti-Spectral InformationCloud Free ProductsFree Data, Free Software
Series of algorithm for estimatingenvironmental physical parameter.Local Receiving is feasible
Free for receivingS band – X band100,000 US$-500,000US$
Hyper-Spectral Information e.g. 36 ch.Improved Resolution to 250m-500mValue Added Data Product, e.g. MODISNetwork Data Distribution, AIT, UT,NASANear Real time Monitoring, several hrs.
-Advantage of High-ResolutionEasy for interpretation
- Good products line SystematicHigh-Precision
- Good search/ordering systemCommercial
- Distributor Easy HandlingCommon formatsSupported by various
softwareGood combination
with 1/100,00 –1/50,000 mapsPlenty of Application
examplesImproved resolution Multi-Spectral
High resolution Low resolution
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Selection between:Low to Moderate Resolution Optical Satellites
•Low to Moderate resolution satellite data with their resolution of250 to 1km is important to regional to global scale environmentalmonitoring.•The advantage of these data are their frequent observation whichcovers the whole globe within one day. Some satellites havemorning and afternoon satellites which gives us twice a dayobservation.•In spite of its low spatial resolution, its high multi-temporalcapability, high-sensitivity sensors, multi-spectral capabilityprovide us with excellent data and application opportunity.•Also, recent effort to provide the data in systematic way such asdistribution on internet, producing value added data has beenenhancing its usability.
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RADAR RSSAR( Synthetic Aperture Radar )
• All weather capability• Construction of short-interval time series
through cloud cover• crop-growth cycle• Ground Roughness (flat or rigid)• Moisture :
- soil moisture• Structure :
- vegetation height
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Reference:Assoc.Prof.Dr.HONDA Kiyoshi, Lecture Note .School of
Engineering and Technology ,AIT Thailand.
Suggested Web Sites:Suggested Web Sites:• AUSLIG (http://www.auslig.gov.au/)• Space Imaging (http://www.spaceimage.com/)• Australian Bureau of Meteorology
(http://www.bom.gov.au/sat/intro/paper1intro.shtml)
• JPL Radar Site (http://www.jpl.nasa.gov/radar/sircxsar/)• Australian geological Survey Organization
(http://www.agso.gov.au/)
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