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Remote sensingRemote sensingIntroduction, application Introduction, application
and examplesand examples
What can we use it for?What can we use it for?
►►Mapping Mapping (geologic mapping(geologic mapping…… etc.)etc.)
►►Monitor Monitor (Tectonic deformation, deforest.. etc.)(Tectonic deformation, deforest.. etc.)
►►Quick response Quick response (Hazard estimations(Hazard estimations…… etc.)etc.)
►►Generate DEM Generate DEM
Common types in Remote SensingCommon types in Remote Sensing
►►Active systemActive system RadarRadar LidarLidar SonarSonar
►►Passive systemPassive system Aerial photoAerial photo Satellite imageSatellite image
Common types in Remote SensingCommon types in Remote Sensing
►►Active systemActive system RadarRadar LidarLidar SonarSonar
►►Passive systemPassive system Aerial photoAerial photo Satellite imageSatellite image
What do we need to know..What do we need to know..
►►Image AcquisitionImage Acquisition
►►Image ProcessingImage Processing
►►Image InterpretationImage Interpretation
What do we need to know..What do we need to know..
►►Image AcquisitionImage Acquisition
►►Image ProcessingImage Processing
►►Image InterpretationImage Interpretation
Across-Track Scanner
Push-broom Scanner
Framing Camera
PCI
ENVI
ERDAS IMAGINE
Matlab, IDL… etc.
What do we need to know..What do we need to know..
►►Image AcquisitionImage Acquisition
►►Image ProcessingImage Processing
►►Image InterpretationImage Interpretation
What do we need to know..What do we need to know..
►►Image AcquisitionImage Acquisition
►►Image ProcessingImage Processing
►►Image InterpretationImage InterpretationYour brain
Tools
http://rst.gsfc.nasa.gov/Sect2/Sect2_3.html
Satellites you should knowSatellites you should know
►►LandsatLandsat►►Terra (ASTER)Terra (ASTER)►►MODISMODIS►►SPOTSPOT►►IKONOSIKONOS►►QuickbirdQuickbird
You can find more information fromhttp://www.satimagingcorp.com/
Satellites you should knowSatellites you should know
►►LandsatLandsat (15 (15 –– 120m)120m)►►Terra (ASTER)Terra (ASTER) (15 (15 –– 90m)90m)►►MODISMODIS (250 (250 –– 1000m)1000m)►►SPOTSPOT (2.5 (2.5 –– 20m)20m)►►IKONOSIKONOS (1.0 (1.0 –– 4.0m)4.0m)►►QuickbirdQuickbird (0.6 (0.6 –– 2.4m)2.4m)
You can find more information fromhttp://www.satimagingcorp.com/
Swath (km)
Res
olut
ion
(m)
Please keep in mind..Please keep in mind..
►► Satellite image Satellite image ≠≠ PhotoPhoto
►► Image color Image color ≠≠ real colorreal color
(CORONA) (Quick Brid, from Google Map)
FORMOSAT – 2 (Panchromatic, 2m)
FORMOSAT – 2 (Multispectral, 8m)
FORMOSAT – 2 (Pan image, 2m)
Satellite image correctionSatellite image correction
http://www.spot.com/
Please keep in mind..Please keep in mind..
►► Satellite image Satellite image ≠≠ PhotoPhoto
►► Image color Image color ≠≠ real colorreal colorLandsat 7
(ETM+ sensor)Wavelength
(micrometers)Resolution
(m)
Band 1 0.45 - 0.515 30 Blue
Band 2 0.525 - 0.605 30 Green
Band 3 0.63 - 0.69 30 Red
Band 4 0.75 - 0.90 30 Near IR
Band 5 1.55 - 1.75 30 Mid IR
Band 6 10.40 - 12.5 60 Thermal
Band 7 2.09 - 2.35 30 Mid IR
Pan Band .52 - .90 15 VIN – Near IR
http://landsat.gsfc.nasa.gov/education/compositor/
True Color
http://landsat.gsfc.nasa.gov/education/compositor/
False Color
http://rst.gsfc.nasa.gov/Sect2/Sect2_1.html
Landsat 7 (ETM+ sensor)
Wavelength(micrometers)
Band 1 0.45 - 0.515 B
Band 2 0.525 - 0.605 G
Band 3 0.63 - 0.69 R
Band 4 0.75 - 0.90 N IR
Band 5 1.55 - 1.75 M IR
Band 6 10.40 - 12.5 Th
Band 7 2.09 - 2.35 M IR
Pan Band .52 - .90
ASTER (sensor) Wavelength(micrometers)
B1 VNIR_Band1 0.52 - 0.60
B2 VNIR_Band2 0.63 - 0.69
B3 VNIR_Band3N/B 0.76 - 0.86
B5 SWIR_Band4 1.60 - 1.70
B6 SWIR_Band5 2.145 - 2.185
B7 SWIR_Band6 2.185 - 2.225
B8 SWIR_Band7 2.235 - 2.285
B9 SWIR_Band8 2.295 - 2.365
B10 SWIR_Band9 2.36 - 2.43
B11 TIR_Band10 8.125 - 8.475
B12 TIR_Band11 8.475 - 8.825
B13 TIR_Band12 8.925 - 9.275
B14 TIR_Band13 10.25 - 10.95
B15 TIR_Band14 10.95 - 11.65
http://www.ersdac.or.jp/ASTERimage/Image/023_SAF.jpg
False Color
RGB = 321
R = N-IRG = RedB = Green
http://www.ersdac.or.jp/ASTERimage2/Image/06.JPG
False Color
RGB = 231
R = RedG = N-IRB = Green
Try yourselfTry yourself
►► Open the LANDSAT and ASTER image in ENVIOpen the LANDSAT and ASTER image in ENVI►► Make a false color imageMake a false color image►► Output your image to ArcOutput your image to Arc--MapMap
Work with ENVIWork with ENVI
Open LANDSATOpen LANDSAT
RGB = 321RGB = 321
RGB = 321 RGB = 753
321
731
Output the Output the GeotiffGeotiff
Make a panMake a pan--sharpening imagesharpening image
LANDSAT-7 Band 8 (15m) LANDSAT-7 Band 3 (30m)
Make a panMake a pan--sharpening imagesharpening image
LANDSAT-7 15m Color (Pan) LANDSAT-7 30m RGB (7,3,1)
Make a panMake a pan--sharpening imagesharpening image
B/WHigh-Res
ColorLow-Res
Intensity Color info
Coloredimage
Make a panMake a pan--sharpening imagesharpening image
B/WHigh-Res
ColorLow-Res
Intensity Color info
Coloredimage
Make a panMake a pan--sharpening imagesharpening image
B/WHigh-Res
ColorLow-Res
Intensity Color info
Coloredimage
Make a panMake a pan--sharpening imagesharpening image
Open ASTEROpen ASTER
RGB = 321
RGB = 231
OrthorectifyOrthorectify image (L1B image (L1B --> Ortho)> Ortho)
ASTER Level-1BASTER Ortho