This section covers the following topics:

• RPC Orthorectification Workflow
• RPC Orthorectification Using Reference Image
• Generate GCPs from Reference Image
• Image Registration
• Overlay Grid Lines
• Reproject Images
• Select Coordinate Systems
• Create Coordinate System Strings
• Build RPCs
• Legacy Tools
• Reference

See Map Information in ENVI to learn more about coordinate systems, spatial references, and grid definitions.