Georeferencing using ERDAS software

1. MAP TO IMAGE
GEOREFERENCING
By
Swetha A
5WD12CGI15

2. Run ERDAS software
 Open a new viewer i.e. viewer1


3. 
Open the satellite image which needs to be georeferenced.

4. Open a new viewer i.e. viewer2
 For this viewer open the toposheet which is already
georeferenced.


5. 
In first viewer1
Go to raster option click geometric corrections.
 Select polynomial option as geometric model.


6.  Click
add/ change projection .
 Select geographic(lat/lon) as projection type and
Everest as spheroid name.
 Close the polynomial model.

7. 
A GCP tool box will be shown as below.

8. Use the symbol
in the in GCP tool box to mark
the ground control points (GCP’S ) as shown.
 Mark at least 4 GCP’s to get a georeferenced
image.


9. 
4 GCP points are shown below .

10. Use
symbol in tools to do resampling method .
 Give output file name select required resample
method n click ok.


11. 
After performing resampling open the new
output file created in different viewer.

12. 
The image can be verified using swipe command.
 In
the viewer with georeferenced image can be
opened with raster options fit to frame and
background transparent.

13. 
This will be the result

14. 
Further validation can be done using swipe
command ..

15. 
The swipe position can be moved to see the
overlap of the features.

16. THANKS