B - The Mars Surface: Zones & Bands

Mars Planet Surface

Summary. Mars is a smaller world than Earth—about half Earth’s diameter—but because it lacks global oceans, its entire surface is land.

The result is a memorable rule of thumb: Mars’ total surface area (~145 million km²) is roughly equal to the area of all Earth’s continents combined (~149 million km²).

The Moon, by contrast, is far smaller, with only ~38 million km² of surface—about one-quarter of Mars.

Planetary dimensions at a glance

Mean radius (km): Earth 6,371 | Mars 3,390 | Moon 1,737.
Diameter (km): Earth 12,742 | Mars 6,779 | Moon 3,474.
Equatorial circumference (km, approx.): Earth 40,075 | Mars ~21,000 | Moon ~10,900.
Surface gravity (m·s⁻²): Earth 9.81 | Mars 3.71 | Moon 1.62.
Numbers from NASA fact pages and standard references.

What the size means in practice

Map scale & travel distance – A transcontinental trek on Earth (say, 5,000 km) corresponds to a similar long-haul traverse on Mars; planet-spanning missions there are genuinely intercontinental in scope. The equatorial lap of Mars is roughly ~21,000 km—a little over half of Earth’s—so great-circle trips are shorter, but still planetary in scale.
Horizon distance (human “feel”) – For an eye height ~1.7 m, the geometric horizon on Earth is ~4.7 km; on Mars it’s ~3.4 km (smaller radius curves away sooner), so the horizon feels closer, with landforms dropping below it more quickly.
Gravity context – Mars’ surface gravity is ~0.38 g (about ⅓ of Earth’s), while the Moon’s is ~0.17 g. This doesn’t change area, but it changes how terrain is experienced—from how far dust is lofted to how easily a rover (or person) can climb a slope.

Domain	Mars Reality (first-century ground truth)	Primary Implications
Air & Pressure	~95% CO₂; 0.6–0.8 kPa lowlands; higher in deep basins	EVA is always pressurised; suit design favors dust sealing over wind load; boiling point constraints for fluids
Light & Visibility	TOA ~590 W/m² (~43% Earth); τ 0.3→5+ governs ground light; blue sunsets, amber days	Power planning by τ; lighting as psychology and protocol; operations shift toward mornings/clear windows
Wind & Abrasion	Gusts 25–30 m/s common aloft; low dynamic pressure; active sand saltation	Structural shove modest; abrasion/infiltration dominant; sacrificial skins, replaceable “eyebrows,” frequent cleaning
Temperature & Thermal	Mean ~210 K; large diurnal swings; basins milder, plateaus harsher	Radiative & ground-coupled thermal design; trenching; radiator scheduling; heat treated as inventory
Sound & Comms	~240–250 m/s; frequency-dependent speeds; strong attenuation	Acoustic cues unreliable outdoors; visual & haptic signaling favored; door-tones and pressure chimes standard
Weather & Storms	No rain; frost/CO₂ snow; local/regional storms; planet-encircling veils episodic	Convoy spacing by visibility; storm playbooks; storage and non-solar baseload mandatory
Seasons & Pressure Tide	~25–30% atmospheric CO₂ migrates poleward each winter	Barometric planning baked into rota; valve scheduling; calendar aligned to pressure reality
Landscape & Mobility	Plains, canyonlands, crater floors, lava aprons, polar plateaus	Route grading; inversion hazards; dust pools; honest maps and conservative reach rings
Dust & Cleanliness	Micron-scale fines; electrostatic adhesion; persistent lofting	Design for cleanability; filter life as KPI; coatings wear tracking; dust-lock etiquette as civic norm

Zones & Bands

The Zones–Bands–Zands (ZBS) Coordinate System

The ZBS system (Zones, Bands, and Zands) is a universal planetary surface division method designed for mapping, navigation, and administrative use on any roughly spherical astronomical body with a radius greater than 250 km. It is intended for use on planets, moons, and large asteroids that may become sites of human exploration and settlement.

The system divides the surface of a body into standardised, repeatable units that can be referenced consistently across scientific, operational, and settlement activities. It is designed to work on Mars, the Moon, and other bodies lacking natural geographic boundaries, and can also be applied to Earth for comparative purposes.

The ZBS system divides a planetary body’s surface into three primary components:

Zones – longitudinal divisions of 15° each.
Bands – latitudinal strips of 6° each between ±72°.
Zands (ZoneBands) – intersections of Zones and Bands, representing quasi-equal-area grid cells.

1. Zones - Zones divide the planet’s surface into 24 longitudinal slices, each 15° wide.

A–X: cover the 360° equatorial and mid-latitude belt (0–360° in 15° steps).
Extent: Zones run continuously from pole to pole.
Count: Always 24.
Provide a natural east–west indexing system.
Align with planetary timekeeping, enabling direct correspondence with “time zones.”

2. Bands - Bands are latitudinal strips, each 6° tall, spanning from 72°S to 72°N.

Provide a consistent north–south index.
Facilitate mapping of climate belts, daylight hours, and settlement zones.
Labelling: 24 Bands (b–y), with a–m in the northern hemisphere and n–z in the southern.
Extent: Total of 24 Bands cover the sub-polar belt.
Note – “Band a” is the northern polar region, and “Band z” is the southern polar region

3. Zands (a.k.a. ZoneBands) - A Zand is the intersection of one Zone and one Band. Provide manageable operational units (~200–300k km²). Nest cleanly into larger Quads and smaller Provinces.

Sub-polar Zands: Dimensions: 6° latitude × 15° longitude. Area ranges from ~145,000 km² (near 72° latitude) to ~318,000 km² (at equator). Total: 24 × 24 = 576.
Polar Zands: Above ±72°, each polar cap is divided into 24 wedges (15° wide, 18° tall). Each wedge = one Polar Zand. Total: 48 (24 north, 24 south).
Global Total: 624 Zands per body.

Benefits

Scalability: From Quads (~6,000,000 km²) to Zands (~200,000 km²) to Clicks (~1 km²).
Neutrality: Independent of national mapping traditions.
Predictability: Zones = 15° longitude, Bands = 6° latitude.
Integration with timekeeping: Longitudinal Zones double as planetary time zones.
Universality: Works on any spherical body >250 km radius (e.g. Mars, Ceres, Titan, etc.)

Applicability

The ZBS system has been applied to all settlement bodies in the Solar System, including: Mars, The Moon, Ceres, Europa, Ganymede, Callisto, Titan, Enceladus, Triton. Because these bodies lack large oceans or natural boundary markers, ZBS provides a neutral, consistent grid for exploration, navigation, and eventual settlement governance.

Zones of Longitude (24 zones – 15° each)

Letter (Zone Name)	Longitude Range (° E)	Name & Justification
A – Airy	0–15	After crater Airy-0, the prime meridian point.
B – Boreas	15–30	Inspired by Borealis (northern plains).
C – Casius	30–45	After Casius Montes, a range in this sector.
D – Dorsa	45–60	“Dorsa” refers to wrinkle ridges found here.
E – Eos	60–75	Named for Eos Chasma in Valles Marineris region.
F – Fortuna	75–90	After Fortuna Fossae, a network of troughs.
G – Galle	90–105	For Galle Crater (“the happy face” crater).
H – Hebes	105–120	Hebes Chasma, a prominent enclosed canyon.
I – Isidis	120–135	Isidis Planitia impact basin.
J – Juventae	135–150	Juventae Chasma, part of the Valles Marineris.
K – Kasei	150–165	Kasei Valles, large outflow channel system.
L – Libmont	165–180	Libya Montes, hilly highland region.
M – Mangala	180–195 (=-180 to -165)	Mangala Valles, another major channel network.
N – Nili	195–210 (-165 to -150)	Nili Fossae region, fracture system with clay.
O – Olympus	210–225 (-150 to -135)	Olympus Mons, the tallest volcano.
P – Phaethon	225–240 (-135 to -120)	Inspired by Phlegra Montes nearby.
Q – Quince	240–255 (-120 to -105)	A shorter name derived from “Quince Planum”.
R – Rimae	255–270 (-105 to -90)	After Rimae (rilles) around Tharsis.
S – Syriplan	270–285 (-90 to -75)	Syria Planum volcanic plateau.
T – Tharsis	285–300 (-75 to -60)	The huge Tharsis volcanic rise.
U – Utopia	300–315 (-60 to -45)	Utopia Planitia, a large plain.
V – Valles	315–330 (-45 to -30)	From Valles Marineris (broader reference).
W – Warrego	330–345 (-30 to -15)	Warrego Valles channels.
X – Xanthe	345–360 (-15 to 0)	Xanthe Terra, rugged highlands.

Bands of Latitude (24 zones – 6° each sub-polar)

Name	Description	Latitude Range (°N→°S)
A – Aether	Extreme northern zone, named for the upper air or pure sky	+90.00° to +72.0°
B – Borealis	Northern polar adjacent region, referencing the Borealis Basin	+72.0° to +66.0°
C – Crya	Cold region with potential subsurface ice	+66.0° to +60.0°
D – Drift	Zones of persistent dust drifts and dunes	+60.0° to +54.0°
E – Esker	Layered terrain like Earth glacial eskers	+54.0° to +48.0°
F – Frost	Mid-high latitudes with regular frost patterns	+48.0° to +42.0°
G – Glint	High-reflectance zones from ice and seasonal changes	+42.0° to +36.0°
H – Halo	Bands with halo-like atmospheric ice clouds	+36.0° to +30.0°
I – Ignite	Named due to the bright clear summer skys	+30.0° to +24.0°
J – Joule	Solar energy rich zone near equator, referencing thermal gain	+24.0° to +18.0°
K – Kindle	Warmer belts where most power harvesting occurs	+18.0° to +12.0°
L – Lucis	Latin for 'light', high-solar exposure area	+12.0° to +6.0°
M – Meridion	Near Mars’ equator, central life and trade routes	+6.0° to -0.0°
N – Niveus	Transition into southern hemisphere, 'snowy'	-0.0° to -6.0°
O – Oxia	Named for Oxia Palus near equator, mineral-rich	-6.0° to -12.0°
P – Pavonis	Named for Pavonis Mons near equator	-12.0° to -18.0°
Q – Quietus	Silent, minimally active wind zones	-18.0° to -24.0°
R – Ruber	Latin for red — classic Martian hue zones	-24.0° to -30.0°
S – Stratis	Layered geological regions, visible sedimentation	-30.0° to -36.0°
T – Tepidus	Mild southern zones, suitable for habitats	-36.0° to -42.0°
U – Umbra	Shaded canyons and subsurface access	-42.0° to -48.0°
V – Vallis	Southern valley-dominated terrain	-48.0° to -54.0°
W – Whisper	Sparse communication zones or outposts	-54.0° to -60.0°
X – Xerus	Dryest, rockiest southern bands	-60.0° to -66.0°
Y – Yedoma	Permafrost analogue; ice-rich sediments	-66.0° to -72.0°
Z – Zephyrus	Southern polar fringe, wind-swept zones	-72.0° to -90.0°