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

Radar

Optical

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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