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Stereo Analyst Extension
• ERDAS product
• Extension for ArcGIS Desktop
• View stereo image pairs
• 3D feature collection
![Page 2: Stereo Analyst Extension ERDAS product Extension for ArcGIS Desktop View stereo image pairs 3D feature collection](https://reader036.vdocuments.net/reader036/viewer/2022062314/56649ec65503460f94bd17f4/html5/thumbnails/2.jpg)
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
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Stereo Analyst Extension
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Stereo Analyst Extension
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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
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Stereo Analyst Extension
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Stereo Analyst Extension
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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