How to get note coordinates from MusicXML files

Hello everyone,

I am trying to generate a labeled database through MuseScore files. I want to label all notes from a score (whether they are C,D,E,F,G,A or B) and their location. But for that, I need to know the exact location of every note. Looking around the xml files, I see that the are coordinates in "tenths" units (the ones corresponding to default-x and default-y).

My questions are:
1. How can I convert these coordinates into pixels?
2. Is there a possibility to get bounding boxes for the notes with these coordinates? (so that I can know where each note is and which one it is).

      B
      -1
      2

    24
    5
    eighth
    up
    2
    continue

The final goal of my work would be to create a new xml file that contains the labeled note (i.e. B) and its location (in the form of a bounding box).

Thank you so much!