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Mars Global Surveyor, Mars Observer Camera Narrow Angle (MOC_NA) composite.


The WMS browser above or the alternative broser reached by following the caption link is showing the high resolution Mars Observer Camera Narrow Angle (MOC_NA) composite as an overlay on top of the Mars Digital Image Model (MDIM). This 0.5 arc-second per pixel composite contains more than 50,000 images of Mars, covering the S75 to N75 region. This mosaic was built to generate interest and support for explicit handling of planetary coordinate reference systems (CRS) within the suite of OGC standards, especially WMS. This is an uncontrolled mosaic, the images being placed on the global frame based on the best known location using second order polynomial warping. Location errors are common.
OnMars_MOCNA.kml A 5m sparse composite of Mars Global Surveyor MOC Narrow Angle images
OnMars_MDIM_MOCNA.kml A combined view of the MOCNA composite on the MDIM background

For WMS applications, this and other data layers are available from the WMS server which is located at
While this Mars WMS server tolerates the Earth geographic coordinate system encoding EPSG:4326, the Mars specific CRS encoding, IAU2000:49900 is encouraged.
A WorldWind configuration file that allows access to the MOC_NA data via WMS is available here. This XML file should be saved under the WorldWind Config/Mars directoy. Google Earth can also be used to view this data, KML links are provided on this page. The terrain and other earth specific layers should be turned off first.

MDIM 2.1, grayscale

OnMars_MDIM.kml MDIM 2.1, 231m per pixel grayscale image

MDIM2.1 (image base): Mars Digital Image Mosaic version 2.1 with a resolution of 256 pixels/degree (scale approximately 231 m/pixel at the equator) was created at the U.S. Geological Survey. The black-and-white mosaic is processed to emphasize local topographic features. This mosaic replaces two earlier mosaics produced by the USGS from the same set of approximately 4600 images as flown by NASA's Viking Orbiter. The positional accuracy of features in MDIM 2.1 is estimated to be roughly one pixel (200 m), the images used to make MDIM 2.1 were obtained primarily through the red, clear, and minus-blue filters of the Viking Orbiter imaging system, and thus provide a monochromatic view of Mars weighted toward the red end of the visible spectrum.

MDIM 2.1, colorized

OnMars_CMDIM.kml A colorized version of the MDIM layer, hillshaded using MOLA


OnMars_THEMIS.kml THEMIS Infrared mosaic

THEMIS Day IR Global Mosaic: Mars Thermal Emission Imaging System (THEMIS) IR (12.57um) mosaic with a resolution of 256 pixels/degree (approximately 231 m/pixel at the equator). The THEMIS instrument was flown on NASA's Mars Odyssey (MO). The mosaic was created at Arizona State University by the THEMIS team.


OnMars_MOLA.kml MOLA derived DEM

The Mars Orbiter Laser Altimeter (MOLA) instrument is onboard of the NASA Mars Global Surveyor (MGS) spacecraft. MOLA took more than six million individual measurements between 1999 and 2001 (Neumann and others, 2001). These measurements were converted into a digital elevation model (DEM; Neumann and others, 2001; Smith and others, 2001) with a resolution of 128 pixels/degree at NASA's Goddard Space Flight Center . In projection, the pixels are 463.086 m in size at the equator.
The elevation layer is stored internal to the server as 16 per sample, signed. An WMS request com obtain the full precision data by requesting png or geotiff format and the short_int style for this layeer

MOLA, colorized

OnMars_CMOLA.kml Mars Colorized and hillshaded Elevation

Other layers available from the WMS server include a maximum local slope map calculated from the MOLA DEMMola Slope and the MSSS Atlas image

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