Is it possible to feed the HoloLens with a previously downloaded spatial map and populate this with anchors

Hey guys,
I downloaded a HoloLens 2 spatial map (as .obj) by using the device portal. However, I was wondering whether it is possible to use this spatial map within an app made with UE. This would allow me to precisely place local spatial anchors within the model and load this on the HoloLens 2.

I want to do this to prevent the user from placing all anchor points by hand. This is necessary because I am creating an app for a large field with objects that need many anchors.

Is this possible? Or do you have other suggestions? Please let me know.