Image Data Pre- processing for Pacific Island Countries Poate Degei & Litia Gaunavou.

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Presentation transcript:

Image Data Pre- processing for Pacific Island Countries Poate Degei & Litia Gaunavou

User in Pacific Island Country Image Data Purchase SOPAC - SPC  Which data is available?  Which data is suitable?  Area delineation  License agreement  Import handling (customs, etc.)  Data quality check  Safety copy

Pre-Processing Bundle 1.Ortho-Correction 2.Atmospheric Correction 3.Pan-Sharpen “normal” colour 4.Pan-Sharpen false colour IR 5.Vegetation index NIR - RED NDVI = NIR + RED

Image Stitching Stitched Image Image Tiles

Haze Removal Raw LandSat 4 TM (Fiji – 1991)Haze Corrected LandSat 4 TM

Atmospheric Correction Atmospheric Correction  View Angle  Sensor type  Calibration data  Sun angle  View Angle  Sensor type  Calibration data  Sun angle

Corrected Image Raw ALOS Image (Fiji 2007)ALOS Image + atmospheric correction

Pan-Sharpening Red Green Blue Panchromatic Image Data Blue Green Red Intensity Hue Saturation Hue Multi-spectral IMGPan-sharpened IMG IHS Resolution Merge

Pan-Sharpening WorldView-2: MS DataWorldView-2 PAN data

Pansharpen_123Pansharpen_234 Result

New Satellites, GeoEye-1 & WorldView-2 High geo-accuracy ~ 5m 1.Star tracker 2.Advanced GPS position Ortho Correction required to activate high geo-accuracy

Ortho Correction Orthocorrection requires a DTMOrthocorrection requires a DTM the DTM should have similar scale as image datathe DTM should have similar scale as image data

Inclusion of the Geoid - The sensor captures the image relative to the WGS84 ellipsoid…

FYI!!! - Digital Globe New Pricing: $16.95 US

Vinaka!