Why might the same Kashmir region in south central Asia be shown three different ways on maps?

The Kashmir region in south central Asia is shown three different ways on maps due to ongoing territorial disputes between India, Pakistan and China.

Indian perspective:

- Controlled by India: Parts of Kashmir under Indian control are shown as integral part of India.

- Pakistan Occupied Kashmir (POK): Areas controlled by Pakistan are shown as part of POK.

Pakistani perspective:

- Indian Occupied Kashmir (IOK): Areas controlled by India are referred to as IOK on Pakistani maps.

- Gilgit-Baltistan: The region administered by Pakistan is depicted as part of Gilgit-Baltistan.

Chinese perspective:

- Aksai Chin: The area administered by China is shown as part of Aksai Chin.