Thanks
Ragnar
I didn't knew about this way of crating a map. I could not find any svg map so i decided to create it using tracing.
I will try to follow your direction.

Map is of pakistan but the division is not based on cities instead is based on constituencies.
How can we draw map using a script?

Yes i could try to minimize the gap by growing the pixel by half but still there will be gaps.

Won't hand tracing be difficult for whole map?

I have looked the output of auto trace you have generated. I want to have this type of output but lot of edge details are lost in it. I will try to play with different options of auto trace so that edge detail loss is minimum. Apart from that i came up with another idea of using bucket to fill the i...

The image shown earlier is a small part of the following image. https://dl.dropboxusercontent.com/u/69516247/Original.gif Some parts are not close enough. I tried to draw manually but it will take a lot of time. I was looking for some automatic process if available in Inkscape. Using trace bitmap i ...

I am trying to vectorize a map. I have created a sketch from the original image using trace bitmap option. Output of tracing can be seen in the image below. https://dl.dropboxusercontent.com/u/69516247/mapsketch.svg Tracing have created outer and inner edge using path and then filled it with black c...