1. Attach wc3 to cheat engine
2. scan type: float
3. go ingame
4. Scroll down your mousewheel ingame
Do the following all without moving your camera ingame
5. first scan 1200
6. Scroll mousewheel back up ingame
7. next scan 1649
Now you can move camera ingame again.
8. 2 value's left. double click the one ending with 0
9. Freeze the value (tick the box) press enter to edit it, change 1649 into your desired distance, press enter to save.