Is it possible to create a Shortcut that links a foto to a marker on a map?

I'd like to create an iOS / ipadOS Shortcut that, when called, lets me take a photograph, add a caption and store the device's current position as a map marker. The idea is to mark interesting locations for a "proper" photography session, so I can return there with better gear when the light is right. I'm completely open with regard to the apps involved -- as long as it outputs some sort of GPX or KML. It does not seem trivially possible with iOS's bundled actions and apps -- so how can I create such a Shortcut?