Geographical grid pattern based on the 1:1000000 international map series for the State of New South Wales facilitating the description of resource exploration title areas. A BLOCK identifies an area of 5 minutes of Latitude by 5 minutes of Longitude and is referenced by the 1:1000000 international map series name and a number from 1 through 3456. Map Blocks are further described by the NSW Mining Regulation 2016, Part 1, Clause 10: https://www.legislation.nsw.gov.au/#/view/regulation/2016/498/part1/sec10 And by Schedule 4 – Sections 1 through 3: https://www.legislation.nsw.gov.au/#/view/regulation/2016/498/sch4