East Timor Images Mosaic using ERMapper 7 1. Open Ermapper

2. Prepare the files

In this example, I use two satellite images of East Timor. The files are dataset_comp3 and dataset_comp4

3. Run Image Display and Mosaic Method

4. Find file (just select one of them)

Click Browse

5. File(s) has been selected

You can choose whatever you want. The step that I have done used the setting above.

6. Set files types and their properties.

You can choose whatever you want. The step that I have done used the setting above.

7. Select mosaic properties

You can choose whatever you want. The step that I have done used the setting above. Stitch region can not be selected at the moment.

8. Select Display Method

You can choose whatever you want. The step that I have done used the setting above.

9. The result

We have a terrible result. Black colour creates a bad blend. Next, we try use the (stitch) region. Close all windows except main ERMapper window

10. From ERMapper main window, Open file(s)

11. This is one of the example files

12. Display its Algorithm

13. Open Map Composition (in Algorithm Window)

14. I suggest, just select Raster Region mode

15. Edit the region

Some files will have an automatic region. ERMapper kindly gives us the region. If you don’t like provided region just delete it by select the region and click this icon

.

Create a new region using this icon . Close the region with double-click.

16. Do like this (or any shape you want)

17. Name the region using this icon 18. Type meaningful name in the box below, and press Apply

19. Region has been named with ‘jahit’ (example)

20. Save map composition using this icon (in map composition window, not in

main ERMapper Window)

Just press OK

21. Region ‘jahit’ has been created

Just close

22. Do the same to another (other) image(s)

In this example I have created one region on each image. The regions have the same name ‘jahit’

23. Repeat Step 3 to Step 7

Select use stitch region, and name the region with jahit (or any name that you have given). Region name on all images has to be the same. The rest step is the same with step 8

24. The result

The result depends on stitch regions. If we want to completely remove black colour (on the images above), we should change the region on the files. Adjust the region until overlapping region is minimised. A wide overlap creates unclear image along the edge.

25. Have a coffee and watch simpson. Thank to • University of New England for ERMapper License. • My brother Adalfredo Fereirra (Bio) for East Timor images Contact me at beni.raharjo@gmail.com

Overlapping region needs to be minimized. Thinner is better.