optical • lidar...6/9/2010 23: 19 utc (radar intensity imagery) 150030'o"e 50 151 00'0" e 1...
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School of Civil & Environmental Engineering
• Optical
• Radar
• LiDAR
• Rapid change
• Large scale
• Rough terrain
• Persistent cloud cover
• 2D to 3D
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School of Civil & Environmental Engineering
Landsat program
• Landsat-1: July 23, 1972
– Revisit: 16 days
• Landsat-8: February 11, 2013
– Pixel size: 15m /30m /100m
– Swath: 185 km
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School of Civil & Environmental Engineering
Open Availability of Landsat Data
• 2008: USGS opens Landsat archive at no charge over Internet;
• Free data results in explosive data-distribution growth
• Daily average of scenes jumps from 53 per day to 5776 per day
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School of Civil & Environmental Engineering
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Landsat: NSW
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Radar
Optical
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School of Civil & Environmental Engineering
Google Maps – Guiyang, southwest China
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School of Civil & Environmental Engineering
Optical
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School of Civil & Environmental Engineering
Radar
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School of Civil & Environmental Engineering
Ground
displacement
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School of Civil & Environmental Engineering
Landsat: Guiyang in 1995
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School of Civil & Environmental Engineering
Landsat: Guiyang in 2013
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School of Civil & Environmental Engineering
Our goals … more open satellite data … NISAR
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