For my current Traveller campaign, I've been making sector files for use with the Traveller Map Booklet and Poster Makers.
To make things easier, I've made a spreadsheet that will help create T5 Column Delimited Format sector files. You just enter the data in the columns, and a properly spaced file will appear on another tab, which can be copied directly into the Traveller Map tools.
https://polyhedralnonsense.com/2024/12/22/sector-file-maker-a-spreadsheet-for-traveller/
To make things easier, I've made a spreadsheet that will help create T5 Column Delimited Format sector files. You just enter the data in the columns, and a properly spaced file will appear on another tab, which can be copied directly into the Traveller Map tools.
https://polyhedralnonsense.com/2024/12/22/sector-file-maker-a-spreadsheet-for-traveller/