How to find the Coords in the Area tag?

I want a shape, say circle in the particular area in a map. With the hel开发者_开发技巧p of area tag in Html, i can do that. But how do i give the values to the coords attributes so that i need a shape at that particular area?

Use GIMP to generate map co-ords for you.

Filter-> Web -> ImageMap

For further doubts, refer to gimp's docs.

Open image in MS Paint on the left hand side bottom you can see the coordinates