Getting Geo-referenced Images from Google Earth

on March 01, 2009

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

Best way to start is to clear the Google Earth cache folder from the Tools---> Options ---->Cache ---> Clear Memory Cache of GE software.image

  1. 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.
  2. Close the program.
  3.  

  4. Click on GE_jpg_extractor.execlip_image002
  5. Following window will open to let you specify further options:image
  6. Click on option 1 as shown in the figure below. An “Open” window will appear, select dbChache.dat from the Google Earth Folder. Make sure that Google Earth software is closed otherwise it will give an error message.  image
  7. Click on the Option 2 to specify the path where the data will be saved after extraction from cache.image
  8. Check the box in front of Option 3 and click on the button. The progress bar will start showing the rate of extraction. On its completion images will be extracted in the specified folder.image
  9. You will see in the specified destination folder, there will be one or two new folders named “Server 0” and “Server 1”.
  10. Server 0 folder is of your interest. It will be having another folder named “KH”. That will contain further folders named as 01, 02, 03…..19 or 20. Patches in folder 18 and above are of really good resolution.image
  11. Now run qrstcc.exe clip_image002[6]It will open the calibrator for you.
  12. Follow the process as mentioned in the picture below to calibrate your extracted patches. clip_image003
  13. In the Source Path, point the folder in which patches are saved. Generally it will be KH folder in Server 0
  14. Map type should be Google Earth
  15. 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
  16. Calibration file type should be OziExplorer
  17. Hit Convert, and progress will start. At successful completion it will give a message of “Done”.
  18. Now open the folders named 17, 18 or above and you will see all patches have a calibration file of OziExplorer with them. image
  19. Sort these file by type to get all .map files at one place. Open all files in Global Mapper. Move to the area of your interest and it will be like this.image
  20. 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.

                                                       ..::Enjoy::..

14 comments:

Mary said...

Hello....I try to do the procedure above but it doesn't works. Just some images were georeferenced...the other (the most part of them) global mapper can't open and return the error message:'Unable to open JPG file. Not a JPEG file'. What I have to do?
Thanks.

F Khalid said...

Hi Guys,
I appreciate the efforts you are making to promote GIS in Pakistan, however the procedure above breaks quite a few copyrights.

Khydija Wakeel and Muhammad Qadeer said...

Dear F Khalid, can you please mention those "copyrights" so that we may correct our course of action. Your support in this regard will be highly appreciated.

YAKOUNA said...

you dont need all this to do

just download mapwindow shape2earth and it is resolved!!!

Nangraiz said...

but shape2earth is not crack if u have crack link plz????

Nangraiz said...

the above software has upgraded version too.. if some one has been used...

Anonymous said...

Hello
I'm a current user of "GE_jpg_extractor” and “QRST Convertor and Calibrator”, I use global mapper to combine calibrated jpg files from GE cache, but since a few time I've got a wrong lat and long.
There is a message "geographic projection out of range" in global mapper, and roughly 20 to 30° of difference between the real lat and long to the other one.
Does one of you have got the same problem?

Anonymous said...

I discover the problem about the wrong lat lon with ge dbcache

Anonymous said...

Sir
Can you do me a fovour and downlod the images of quetta. Plz

milan said...

thks so much sir,,

Anonymous said...

I followed the above procedure, but when i try to open the images in global mapper, the following error appears 'Unable to open JPG file. Not a JPEG file'. Please help

Peta Citra said...

Want to get maps from google. Just tell me. I will give you your GE maps, my product is very cheap.

Atiqa Khan said...

Issue with opening images in Global Mapper...It is asking to "select the type of overlay,the overlay type is not determine from the filename you entered"
Can any one how to resolve this issue in Global Mapper

Unknown said...

unable to open .map file in global mapper
can somebody please help me., will be deeply appreciated!

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