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I would like to convert an image from google maps

enter image description here

into a black and white edition, without gray scale, something that will look like that

enter image description here

How can this be achieved with Adobe Photoshop CS5?

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Have you tried simply drawing it? –  Scott Oct 9 '13 at 13:20
    
Try to play around with image contrast, gradient map etc.. I do concur with Scott that redrawing the map will probably yield a better-looking result, though. –  Bakabaka Oct 9 '13 at 13:29
    
@Scott: Thank you very much for your comment. Unfortunately, I have to include the maps from google, therefore drawing them cannot be applied here. Even if it could, I don't think I could make it look exact;y like google. –  Thanos Oct 9 '13 at 13:34
    
@Bakabaka: Thank's for your comment. I tried to play a bit with B&W filter, contrast but the outcome is always something in gray scale... –  Thanos Oct 9 '13 at 13:35
    
@Thanos: after you've made a greyscale, try using Image > Adjustments > Threshold for a true B&W effect. –  Bakabaka Oct 9 '13 at 13:43
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1 Answer

The closest you could probably get without drawing it is to use the filter > stylize > find edges (adjusting the contrast first might work better). Once that is applied, use the threshold adjustment to make it black and white.

Here is a quick example of the result: enter image description here

Another way is to use the filter gallery > stylize > glowing edges. This gives you a smoother line that you can adjust with sliders. Once you've adjusted it, use a threshold adjustment layer (adjust the slider), then invert it with the invert adjustment layer.

Here is what that looks like: enter image description here

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