Like many in the UK, my setup is in my garden. I have fences and trees that limit the sky I can view.
Would it be possible to use that app to map the obstacles to help me plan my astrophotography.
PenguinPos82 Stellarium can do so already. I use it to plan my sessions. Refer to some of those search results for more info here: https://www.google.com/search?q=stellarium+obstructions