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how to cut an large image into small grid images like googlemap does


I have a large image (1200x1600) and i want to cut it in to grid pattern of 120x160 cells (like google map does) and auto-naming each small image for me.

Please recommend me the tool you know. Thank you!
3 Solutions
for me, photoshop is the right tool :)

open your image, and Ctrl+R to show the ruler. from there you can drag vertical and horizontal guides.
and it is better to use grid to specify the size of the blocks.

to modify grid, double click on the ruler and from there you can control the grid size
pdidominicAuthor Commented:
can it generate the grid automatically or i have to manually drag each guide ?
pdidominicAuthor Commented:
i wonder how google split the large image into tiles. Please help me
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i do not think there is auto positioning for guides.
but after you make your guides, choose Slice tool, from the option click the Slices From Guides button, this will slice your image according to the guides.
to save them
use Save for Web, photoshop will rename them automatically.
it is imagination:
i think google use another software, for example:
  • they draw or scan the map in special software
  • in the software they have there is a command for splitting the blocks according to specific measurements.
This might be of some use to you.


To help in the Photoshop process, go to View > Show > Grid in Photoshop.
Then you can change some of your options in the photoshop preference panel for the grid. Go to Photoshop > Preferences > Guides, Grides, Slices...
Change the inch spacing preferences to fit your needs.

( This is for CS3, other versions tool paths may be different, but similar)
Hope that helped.

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