East Timor Images Mosaic using ERMapper 7
My best friend from East Timor has asked me how to mosaic images in ERMapper. I have told him already a quick step in doing so. However, the result that he got was far from nice; the stitch was not perfectly blended. Hmm… I forgot to tell him about stitch region in ERMapper in order to create a better mosaic.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)
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.
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Schlagworte: ermapper, gis, remote sensing,
2 Responses to “East Timor Images Mosaic using ERMapper 7”
said on December 3rd, 2008 at 8:54 pm
thank you very good
said on December 6th, 2008 at 2:35 pm
Automatically correct satellite imagery program ER Mapper
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