Six hundred million laser measurements, taken over five years by NASA's Mars Global Surveyor. KUON GEO builds every map tile from that original data. Click anywhere and read the planet's true elevation.
Open the Mars mapfree · no account · runs in your browserWherever you click, the elevation shown is decoded from the observation data baked into the tile itself. No estimates, no AI in-painting. From the tallest volcano in the solar system to its deepest impact basin.
Until now the map was shaded relief: accurate, but it read like a satellite photo. Elevation is now painted in colour, so the single biggest fact about Mars is visible at a glance. The northern lowlands are blue, the southern highlands orange, and the Tharsis bulge with the summit of Olympus Mons runs white. Every colour break is printed in the legend, so you can read an elevation back out of the colour.
Place names come from the IAU Gazetteer of Planetary Nomenclature with their official centre coordinates and diameters. Nothing is written from memory. Larger features appear first and more arrive as you zoom, and the colour tells you the kind: volcano, canyon, plain, highland, ridge, crater.
Switch on the night infrared layer and the ground reveals its material. Places that stay warm after dark are rock and bedrock; places that cool quickly are dust and sand. This is not a temperature reading, and the legend says so: the USGS publishes it as a visual representation only, covering 60N to 60S. It is a different fact from elevation, laid over the same ground.
Mars has weather. At Gale Crater, the Curiosity rover still measures air temperature, ground temperature and pressure every single sol, and KUON MARS shows those measurements a few sols behind reality: the green pin on the map. Fourteen years of that record are on the page: 4,715 sols since 2012-08-07, switchable between a timeline and a seasonal overlay where the annual CO2 pressure cycle appears in one view. Missing sols are drawn as gaps, never interpolated. Archives for Jezero (MEDA) and Elysium (InSight, 2018-2022) connect in August.
KUON MARS embeds no third-party map service. We download the original observations, verify them, encode them into tiles, and record the provenance of every step.
Olympus Mons, at about 21,229 m above the MOLA reference surface: roughly 2.4 times Mount Everest, and the largest volcano in the solar system. Click its summit on KUON MARS to see the measured value.
Hellas Basin, about -8,200 m at its deepest and 2,300 km across: a giant impact basin with the densest air on the planet.
Yes. They are the measurements of NASA's MOLA laser altimeter aboard Mars Global Surveyor (1996-2001, 463 m/px), tiled by KUON GEO directly from the USGS original (CC0) with verification at every step. No generative AI, no invented detail.
Yes. The atmosphere is under 1% of Earth's, but dust storms, ice clouds, fog and seasons are observed. KUON MARS plots fourteen years of measured weather at Gale Crater, and archives the orbiter's weekly global reports. There is no free source for a current global dust map, so we do not show one.
Free, with no account required. Source: NASA/USGS MGS MOLA (CC0); tiles and hosting by KUON GEO.