I have a local image and I want to use it in my iOS app, but I want to get the tap areas in the image and then draw the animated route?

Question

I have a local image and I want to use it in my iOS app, but I want to get the tap areas in the image and then draw the animated route? Also, the route should be shortest. Attached are the images for better understanding

Plain Image

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After Selecting the location from map