A - Matlas at a Glance

A.1 — Matlas at a Glance

An Operational Geography for Human Mars

What is Matlas?

Matlas is a proposed operating geography for human settlement on Mars. It provides a persistent, planet-wide system of spatial references between the scientific coordinates that measure Mars and the political, administrative, operational and cultural geography that future Martians will develop for themselves.

Mars is already extensively mapped and partly named. Matlas does not replace that geography. It adds a common structural layer for identifying pieces of the Martian surface at useful scales, from planetary regions down to few-metre addresses.

The Matlas architecture

GRID gives a location its wider geographic context. BAR gives it precise addressable identity. Triplet provides a way for people to communicate that identity using ordinary language.

The fundamental hierarchy

Mars → Quad → Zand → Province → Sector → Tile → Click → Court → Cell

The first six subdivisions are GRID's civil geography. Court and Cell belong to BAR's fine-addressing layer.

The essential design properties

Matlas is global, nested, coordinate-anchored, deterministic and intended to remain intelligible without a central address registry. Its spatial identities are versioned so that improvements to scientific measurement do not silently alter the meaning of existing references.

Matlas does not assign ownership, jurisdiction, mineral rights, settlement names or political borders. It does not replace precision navigation, specialist mapping or local addresses.

The architecture makes a deliberately narrow promise: different people, institutions and machines can identify the same piece of Mars without being required to organise everything else in the same way.

The governing principle

We name the grammar. Martians name the places.

A.2 — Mars GRID

From Planet to Click

Mars GRID provides a persistent two-dimensional hierarchy of reference areas covering the entire Martian surface.

Its canonical version-one geographic namespace is MGRID:1.

The hierarchy

These angular sizes apply to Regular GRID. Polar GRID preserves the hierarchy and north–south subdivision scales but adapts longitude branching beyond 72° latitude.

The planetary structure

Between 72°S and 72°N, Mars is organised into four latitude Belts and six 60° longitude columns. These produce 24 regular Quads. The North and South Polar caps each form one additional Quad, making 26 globally.

Twenty-four longitude Zones, each 15° wide, intersect twenty-four regular latitude Bands, each 6° high, producing 576 regular Zands. Forty-eight additional polar Zands bring the global total to 624.

Below Zand, regular subdivisions follow four steps:

3 × 3 Provinces → 2 × 5 Sectors → 10 × 10 Tiles → 6 × 6 Clicks.

A GRID reference

MGRID:1:MARS/Q03/Z0506/P32/S24/T0405/C42

This identifies one Click through its unique ancestral path. A reference may stop at an earlier level when broader geography is sufficient.

The central property

Every GRID unit has one parent, apart from Mars itself. Every valid surface location resolves to one unit at each level under the defined reference and boundary rules.

GRID is not equal-area, and it is not designed to be the optimal grid for every scientific or computational application. Its purpose is persistent, understandable, independently reconstructable operating geography.

A.3 — GRID Rules, Persistence and the Poles

One Place, One Defined Identity

The enduring usefulness of GRID depends less on the appearance of its boundaries than on whether those boundaries always mean the same thing.

MRR-1 — The frozen civil ruler

MGRID:1 defines its geometry against MGrid Mars Reference Realisation 1, or MRR-1.

As planetary measurement improves, newer scientific coordinates can be transformed into the frozen civil reference before GRID membership is calculated. The scientific measurements can improve without automatically redrawing the established GRID areas.

B1 — Boundary ownership

GRID assigns exact boundary positions deterministically.

Longitude intervals include their western edge and exclude their eastern edge. An internal longitude boundary therefore belongs to the unit immediately eastward.

Latitude ownership proceeds from the equator towards the poles. An exact internal latitude boundary belongs to the poleward unit.

The equator belongs to the northern hemisphere. The ±72° boundaries belong to Polar GRID. At either exact geographical pole, supplied longitude is ignored for indexing and canonicalised to 0°, yielding one defined apex lineage.

N1 — Numerical conformance

Implementations must reproduce the mathematical boundary rules, including exact boundary cases. Ordinary floating-point rounding is not permitted to change the intended owner of a point.

P1 — Polar adaptation

Regular GRID operates below 72° north and south. At and beyond those latitudes, P1 adapts the number of east–west subdivisions to counter the physical narrowing of longitude.

North–south subdivision sizes remain fixed. The same GRID hierarchy continues through the polar caps, even though the number of children in a particular latitude row may change.

P1 improves physical proportions; it does not create equal-area cells or eliminate the apex singularity.

Versioning — Persistence through change

A change that alters coordinate-to-identifier membership requires an explicit major geometry-version change. Historical versions remain interpretable.

The measurement may improve. The software may improve. The surrounding settlement may change completely.

The spatial reference is designed to stay put.

A.4 — Mars BAR and Triplet

From Click to Exact Address

GRID ends at Click because a kilometre-scale area is useful for organising geography but too large to identify many practical destinations.

Mars BAR — Binary Address Reference — provides the next layer.

The geometric subdivision

Every Click contains a 16 × 16 array of Courts. Every Court contains a further 16 × 16 array of Cells.

A Click therefore contains 65,536 Cells. Across Mars, the architecture provides approximately 12.685 trillion fine-addressable locations.

These are angular subdivisions, so their physical dimensions vary with latitude. BAR inherits the actual Click geometry, including the adaptive geometry of Polar GRID.

Machine identity

BAR identifies a Cell using a compact 44-bit payload:

28 bits — global Click ordinal
8 bits — Court position
8 bits — Cell position

The address can be computed and decoded from the defined rules without allocating entries in a planetary address registry. Its machine representation must be accompanied by the appropriate version and planetary context when exchanged.

Triplet — The human interface

Triplet renders an address as three words:

W1 · W2 · W3

W1 uses a semantic vocabulary family associated with the broad latitude region. W2 uses a family associated with longitude. W3 completes the location, using either the ordinary Cell vocabulary or the dedicated Place/Structure vocabulary for Court addresses.

M3B is the classification, safety and lexical encoding architecture beneath Triplet. The first planned US-English language profile is MB3-EN1.

The word system is intended to support recognition, memorability, pronunciation distinction and resistance to dangerous location errors. Its production vocabulary and human-performance properties require independent validation.

Different future language profiles can use different words while resolving to the same machine location.

The governing distinction

The Cell is the place. The binary payload is its canonical machine identity. Triplet is one way to say it.

A.5 — What Matlas Does — and Does Not Do

A Common Reference, Not a Master Geography

Matlas is designed to be useful partly because it refuses to become the authority for everything that happens on Mars.

What Matlas does

What Matlas does not do

Matlas does not replace latitude, longitude or the scientific coordinate systems on which it depends. It does not measure altitude, determine three-dimensional positions or substitute for surveying and navigation.

It does not replace official planetary nomenclature or claim authority to name Martian features. Recognised scientific names and future local place names remain separate systems that can be connected to Matlas through crosswalks.

Matlas does not establish countries, administrative regions, jurisdictions, ownership, land parcels, resource rights or political legitimacy. Such systems may use GRID references, but their boundaries remain independent.

Nor does Matlas require roads, buildings, settlements, protected areas, scientific formations or utility networks to conform to its geometry.

GRID is not an equal-area analytical system. BAR is not a robotic docking controller. Triplet is not a substitute for everyday local language.

A future city might use named streets, a scientific institute might maintain its own geospatial datasets and a transport company might use specialist routing software. All can coexist with Matlas.

The architecture in one sentence

Matlas provides stable geographic reference underneath the changing ways people and institutions choose to organise Mars.

Its most successful future may be one in which most residents rarely see the system directly, because it is quietly supporting the systems they actually use.