Date post: | 01-Jan-2016 |
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Upload: | eustace-powell |
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Stereo Analyst Extension
• ERDAS product
• Extension for ArcGIS Desktop
• View stereo image pairs
• 3D feature collection
Stereo Analyst Extension
• Project Geology request– Historic aerial photography of Sisk Dam
construction site
– Looking for explanation of structure feature underneath dam
• Aerial photography archive– Retrieved film with 60% forward overlap
– Scanned to digital format
Stereo Analyst Extension
Stereo Analyst Extension
Stereo Analyst Extension
• Image files must be “oriented” but not orthorectified– Process done in a photogrammetric software
application, e.g. LPS, Socet Set, ImageStation
• Extension used to:– Collect features in 3D for better horizontal
accuracy
– Collect mass points for creating elevation models
Stereo Analyst Extension
Stereo Analyst Extension
Stereo Analyst Extension
• ERDAS pricing– License ±<$4,000
– Maintenance ±<$800 annually
• Stereo accessories– Was ± $3,600 per unit
– Now ± $600 per unit
• High end graphics card– ± $4,000