govt map, copyright expires 50 years after it was made [2] (it was also out of copyright in 1996 and so is not copyrighted in the US), so:

This image or other work is of Australian origin and is now in the public domain because its term of copyright has expired. According to the Australian Copyright Council (ACC) , ACC Information Sheet G023v19 (Duration of copyright) (January 2019) . 1 Type of material Copyright has expired if … A Photographs or other works published anonymously, under a pseudonym or the creator is unknown: taken or published prior to 1 January 1955 B Photographs (except A): taken prior to 1 January 1955 C Artistic works (except A & B): the creator died before 1 January 1955 D Published editions 2 (except A & B): first published more than 25 years ago E Commonwealth, State or Territory owned 3 photographs and engravings: taken or published more than 50 years ago 1 Copyright Amendment (Disability Access and Other Measures) Bill 2017 (Australian Government) 2 means the typographical arrangement and layout of a published work. eg. newsprint. 3 owned means where a government is the copyright owner as well as would have owned copyright but reached some other agreement with the creator. When using this template, please provide information of where the image was first published and who created it. You must also include a United States public domain tag to indicate why this work is in the public domain in the United States. العربية ∙ català ∙ Deutsch ∙ English ∙ español ∙ français ∙ 日本語 ∙ македонски ∙ മലയാളം ∙ Nederlands ∙ русский ∙ slovenščina ∙ Tok Pisin ∙ Türkçe ∙ українська ∙ 简体中文 ∙ 繁體中文 ∙ +/−