Canberra is located about halfway between Sydney and Melbourne, two of the largest and most influential cities in Australia. This made it a suitable compromise as a capital city, as it would theoretically be easier for legislators to travel to and from their various constituencies.
2. Lack of a clear alternative
When the decision was made to create a separate federal capital, there were several proposals put forward for potential locations, including Sydney, Melbourne, and several other regional centers. However, none of these proposals were particularly popular or commanded widespread support. As a result, Canberra was selected as a sort of "default" option.
3. Vision of a planned, modern capital city
Walter Burley Griffin, the architect who designed Canberra, envisioned it as a modern and purpose-built capital. He designed the city to be laid out in a geometric pattern with wide boulevards, and planned for a variety of cultural and governmental institutions to be located in the city. This vision of a planned capital city was seen as a way to break away from the colonial past of Australia and create a new, independent identity.