It lies between 0-37 north latitude and 60-97 east longitude. Non-islands are basically between north latitude 10-30, and the east-west distance from north to south is about 3 100 km. There are seven countries in South Asia, among which Nepal and Bhutan are landlocked countries, India, Pakistan and Bangladesh are coastal countries, and Sri Lanka and Maldives are island countries.
From the point of view of surveying and mapping, South Asia is dominated by the Indian plate, rising from sea level to become the Indian subcontinent and the Hindu Kush region. Clockwise, South Asia is surrounded by West Asia, Central Asia, East Asia, Southeast Asia and the Indian Ocean from west to east.
South Asian countries include India, Pakistan, Bangladesh, Sri Lanka, Nepal, Bhutan and Maldives. Sometimes Afghanistan is a South Asian country, and northern Afghanistan belongs to Central Asia. In addition, Myanmar and Tibet are also greatly influenced by South Asia in culture, so they are sometimes included in South Asia.
This subcontinent contains more than one-fifth of the world's population, is the most populous and densely populated area in the world, and is also one of the poorest areas in the world after Africa. Due to political and religious differences, the local political situation is unstable. India and Pakistan have also fought many wars for these reasons. At present, South Asia Regional Cooperation Organization is responsible for economic cooperation in this region.