Google Earth allows for saving images at screen resolution and JPG format. Those are helpful but still need processing and geo-referencing so that they can be used for GIS processing.
The method given below let you get high quality images from Google Earth in geo-referenced form. The principle is to extract images from the local Google Earth cache and then calibrate them for geo-referencing. Two small tools named “GE_jpg_extractor” and “QRST Convertor and Calibrator” will be used in this exercise. You can get them form
- In Google Earth, go to your area of interest. Set a proper zooming level which is required to you and pan to entire of your area with streaming so that it is saved in your local cache again.
- Close the program.
- Click on GE_jpg_extractor.exe
- You will see in the specified destination folder, there will be one or two new folders named “Server 0” and “Server 1”.
- Now run qrstcc.exe It will open the calibrator for you.
- Follow the process as mentioned in the picture below to calibrate your extracted patches.
- In the Source Path, point the folder in which patches are saved. Generally it will be KH folder in Server 0
- Map type should be Google Earth
- Check the Search Subfolders option. It allows to create calibration file for all patches in the subfolders in KH, i.e. 01, 02, 03…..20
- Calibration file type should be OziExplorer
- Hit Convert, and progress will start. At successful completion it will give a message of “Done”.
- Save the image as one file either in geotiff or any other image format you want. It will be georeferenced now can be used for GIS analysis purpose.