Datoteka:USGS-PlanetMars-TopographicalMap.png

Izvor: Hrvatska internetska enciklopedija
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Opis
English: USGS - Planet Mars - Topographical Map - 1-24-2005 - Geologic Investigations Series I-2782
These maps are based on data from the Mars Orbiter Laser Altimeter (MOLA; Smith and others, 2001), an instrument on NASA’s Mars Global Surveyor (MGS) spacecraft (Albee and others, 2001). The image used for the base of this map represents more than 600 million measurements gathered between 1999 and 2001, adjusted for consistency (Neumann and others, 2001, 2003) and converted to planetary radii. These have been converted to elevations above the areoid as determined from a martian gravity field solution GMM-2B (Lemoine and others, 2001), truncated to degree and order 50, and oriented according to current standards (see below). The average accuracy of each point is originally ~100 meters in horizontal position and ~1 meter in radius (Neumann and others, 2001). However, the total elevation uncertainty is at least ±3 m due to the global error in the areoid (±1.8 meters according to Lemoine and others [2001]) and regional uncertainties in its shape (G.A. Neumann, written commun., 2002). The measurements were converted into a digital elevation model (DEM; G.A. Neumann, written commun., 2002; Neumann and others, 2001; Smith and others 2001) using Generic Mapping Tools software (Wessel and Smith, 1998), with a resolution of 0.015625 degree per pixel or 64 pixels per degree. In projection, the pixels are 926.17 meters in size at the equator. Data are very sparse near the two poles (above 87° north and below 87° south latitude) because these areas were sampled by only a few off-nadir altimetry tracks. Gaps between tracks of 1–2 km are common, and some gaps of up to 12 km occur near the equator. DEM points located in these gaps in MOLA data were filled by interpolation.
Datum
Izvor https://pubs.usgs.gov/imap/i2782/; https://pubs.usgs.gov/imap/i2782/i2782_sh1.pdf
Autor U.S. Geological Survey
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Licencija

Public domain
This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.

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Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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Topographical map of Mars, encompassing latitudes 57°N to 57°S, produced by the USGS

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sadašnja18:11, 4. listopada 2021.Minijatura za inačicu od 18:11, 4. listopada 2021.10.292 × 4.720 (6,72 MB)Cherurbinosame 256 clr, larger size + legend

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