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How many GCPs per scene do I need to collect to ortho-recitfy satellite imagery?

April 26, 2017collect gcps Imagery satellite scene

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How many GCPs per scene do I need to collect to ortho-recitfy satellite imagery?

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• ASAR (Envisat – 1B) 8 • ASTER (1A or 1B) 6 • EROS (1A) 8 • ERS/RADARSAT 6 • IKONOS Geo Product 6 (20 is best assuming 5m accuracy of GCPs) • Landsat/IRS 4 • MERIS (Envisat – 1B) 6 • RADARSAT only model 2 • SPOT 1, 2, 3, 4 4 • SPOT 5 (1A) 6 • QuickBird (Basic) 6 • QuickBird (Ortho Ready Standard) 8 In practice it is best to gather double the number of GCPs, as GCPs will contain errors. Click here for more details on the Sensor Models.