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| Formato: | Recurso digital |
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Zenodo
2026
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| Acceso en línea: | https://doi.org/10.5281/zenodo.18826177 |
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- <div>MC-2, titled Diacria, is the second sectional chart in the Atlas of Martian Geography, the visual companion to Encyclopedia of Martian Geography (Thomas Gangale, JSD). This high-resolution map covers the Diacria quadrangle region of Mars (approximately 30°–65°N latitude, 120°–180°W longitude), rendered using USGS Mars Global Surveyor Mars Orbiter Laser Altimeter (MGS MOLA) global color shaded relief data at ~463 m/pixel resolution.The chart centers on the classical albedo feature Diacria—a prominent dark marking in 19th- and early 20th-century telescopic observations, often depicted as a continental or highland region adjacent to the Tharsis bulge and Arcadia Planitia. It integrates revived classical nomenclature with modern areographic features, including: <ul> <li>Overlays of historical albedo designations from astronomers such as Giovanni Schiaparelli (e.g., his 1877–1888 maps), Percival Lowell, and Eugène Antoniadi, placing dozens of "lost" names (part of the encyclopedia's ~400-item revival catalog) onto contemporary topography.</li> <li>Cross-references to IAU-approved toponyms, such as linking classical Diacria to elements of the Diacria region, adjacent Tharsis Montes, Olympus Mons periphery, Amazonis Planitia extensions, and volcanic plains.</li> <li>Annotations on etymology (drawing from classical Greek sources, evoking ancient geographic or mythological concepts) and observational history, highlighting how albedo contrasts were interpreted as landmasses, seas, or canal networks before spacecraft confirmation of volcanic and tectonic origins.</li> <li>Visual emphasis on key topographic contrasts: the elevated Tharsis rise (up to +10–12 km relative to the areoid), surrounding lowlands (e.g., Amazonis Planitia at lower elevations), volcanic constructs, and outflow channels or wrinkle ridges that align with or reinterpret historical markings.</li> </ul> MC-2 continues the project's phased rollout (with two new charts released weekly post-launch), building comprehensive coverage while preserving astronomical heritage. It supports applications in planetary science, historical cartography, astrogeology, and prospective exploration by enriching place-name context without altering official IAU nomenclature.The chart is distributed open-access via Zenodo, alongside the full encyclopedia text, MC-1, and subsequent additions. Citation recommended: Gangale, T. (2026). Atlas of Martian Geography: MC-2 Diacria. This chart exemplifies the fusion of eras: telescopic albedo geography recontextualized on precise MOLA-derived topography, contributing to a layered, culturally enriched understanding of Martian landscapes.</div>