Bring a sector into focus. Explore its worlds, one hex at a time.
Files stay in this browser
Open a sector
Choose a World Builder sector file (.WBS, up to 2 MiB), a Traveller Map sector in T5 tab, T5 column, or older SEC format (up to 16 MiB), or a sector CSV table (.csv, up to 64 MiB). Your current sector stays open until you confirm the import.
Start a new sector
Name an empty sector, then generate star systems into its hexes. An open sector stays open until you confirm.
Keep a project
Download a project to keep its source records and selected world. Reopen a project file (.heaven-earth.json.gz, .heaven-earth.xml, or an older .heaven-earth.json). Files stay on your device.
No sector open. Choose a file or try the sample.
Import review
SECTOR WORKSPACE
Generate a system
Classic Traveller Scouts. Choose an empty hex from 0101 to 3240, or an imported world's hex to build a system around that world. Leave the seed blank for a random one. The seed is kept, so the same seed gives the same system in this version.
Generate a subsector or sector
Checks every hex in an area for a star system with the Scouts system presence table, then generates each system. Hexes that already hold a world are skipped. Each system gets its own seed, so it can be removed or regenerated alone.
Generated areas
None yet.
Used by Add handbook details on an area: it gives each of the area's systems World Builder's Handbook size details, skipping systems that already have them. Leave it blank for a random seed.
Worlds
Filters both views. Select a world to inspect its details.
Worlds in this sector
Hex / world
UWP
Coordinates run 01–32 across and 01–40 down. Choosing a world opens its details in a dialog, where you can name it and add notes. Choosing an empty spot opens that hex, where you can generate a system or use it as a density adjustment corner; by keyboard, the arrow keys move between hexes from any world or the dashed hex cursor, Shift with Left or Right reaches the other diagonal neighbor, Page Up and Page Down move ten rows, Home and End go to the first or last column, and Enter opens a hex. The list offers the same selection and details.
A large map shows names in its hexes. On a smaller map, a name appears beside a world when the pointer rests on it or it has keyboard focus; Escape hides it.
Plan a jump route
A geometric route uses only worlds in this sector. It minimizes jumps, with a stable hex-order tie break. Check fuel, permissions, and travel zones separately. Search filters do not restrict route planning.