Some imagery, such as ASTER, IKONOS, QuickBird, SPOT, ALOS PRISM, ALOS AVNIR-2, and WorldView 1B, may be delivered to you as image tiles with orbital data for each tile. If the image tiles were cut from a strip of data acquired on the same day in a single pass of the satellite, you can stitch the tiles into one image and rebuild the orbital data for the whole strip. By stitching the tiles, you can work with one large image instead of working with several smaller images, which offers some advantages:
- Fewer images to orthorectify and mosaic.
- Fewer ground control points (GCPs) to collect, because there are fewer math models to compute.
- More coverage by the math model by bridging obscured areas, such as areas under cloud cover, where GCPs cannot be collected.
However, computing the math model on the image tiles may provide a better fit to the ground control than a math model for a large scene.
You can stitch the following products for satellite orbital modeling projects:
- ASTER level 1A data
- SPOT level 1A data
- IKONOS GEO product
- IKONOS GEO Ortho Kit product
- QuickBird Basic 1B product
- ALOS PRISM and AVNIR, 1A and 1B1
- WorldView 1B product
A new orbit segment will be created for the stitched PCIDSK (
.pix) file.
With rational function projects, you can stitch the following products:
- IKONOS GEO Ortho Kit product
- QuickBird Basic 1B product
- WorldView Basic 1B product
A new rapid positioning capability (RPC) will be created for the stitched PCIDSK file.
To stitch image tiles