Orthorectification Tutorial

1. Open PCI GEOMATICA 2. Click AIRPLANE ICON, (close update icon) 3. Go to ‘FILE’, choose ‘NEW’ 4. Save file to subdirectory ‘Geomatica’ in project folder 5. Open ‘SATELLITE ORBITAL MODELLING’ 6. Choose Toutin’s model for LandSat images 7. Set projection – UTM 48 (row) N, ACCEPT 8. Set Ellipsoid – WGS -84, ACCEPT 9. Create GCP-project, same information as above 10. Choose ‘DATA INPUT’ – ‘CD’ – LandSat 7 (or other Landsat if applicable) 11. Open Headerfile .HDF in project folder, subdirectory Landsat 12. Read PCIDESK file 13. Go to NEW IMAGE 14. Save image in subdirectory ‘GEOMATICA’, date.xxx 15. Open GCP/TP COLLECTION 16. Collect GCP from Geocoded image. At least 10 points 17. Open 18. Select Channel 19. Load and close 20. Close 21. Collect the points (10 points) 22. Load geocoded image (will not have a “working” icon top left) 23. Load DEM under project folder, subdirectory DEM, file demstrm.pix 24. Open 25. Select Channel (1 for panchromatic, 2 for thermal, six for visual layers on ETM+) 26. Get points, be sure to zoom close so points are put on the same spot. Best points are junctions, summits, airstrips, etc large and immobile objects. 27. Click “USE POINT” on both images 28. Click “EXTRACT ELEVATION” 29. Click “ACCEPT POINT” 30. After 10 or more accepted points, close panel. The points can be recycled, but be sure to check them on all images before accepting them. 31. Go to “OPTIONS” – “EXPORT” – “GCP” 32. Save to textfile (date+.txt). Highlight all points to save 33. IPLXYE 34. Go to “MODEL CALCULATIONS” – “PERFORM BUNDLE ADJUSTMENT”. Click “OK” 35. Go to “ORTHO GENERATION” – “SCHEDULE”. Select your file. Click “OK”. 36. Save under project folder, subdirectory “Orthorectified”. Date+(_pan/thermal)+_ortho 37. Browse to DEM. Specify demsrtm 38. Go to “RECOMPUTE ORTHO BOUND” Set starting time if you do not want it to start right away. You can process multiple files at once from the same layer (pan, visible or thermal). Generate Orthos.