How do I add image map size 4120x3672

I know thats very big image map,but here it's,thats a map yaaa.. anyone can help to make it become a 4 part maybe to make it smaller to use

and the bad news is,the image size is 7,5MB and i can't upload it here,because the maximum upload size is 2 MB

You can use an image editing software like photoshop to make it into smaller images and reconnect them using events.

Best thing to do is break it in to 8 part or whatever then use them as BG or make like tile map

You should not do that at all. See Remember not to waste your memory

You can cut it with C2 image editor, Upload the image then select a piece of it with the selection tool then crop.