Geologic/Geomorphologic Map of the Chryse Planitia Region of Mars
GIS version
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Rationale and Intent:
This geologic map was originally authored by Sue Rotto and Kenneth L. Tanaka in 1995, and has been digitized as a GIS product for public release.  Please use the original citation:

Rotto, S., and Tanaka, K.L. 1995, Geologic/Geomorphologic Map of the Chryse Planitia Region of Mars: U.S. Geological Survey Geologic Investigations Series I–2441, available at https://pubs.er.usgs.gov/publication/i2441.

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Project specific datasets are projected (meters).
Projection: Stereographic 
            Center Longitude: 140.0 E (40.0 W)
            Center Latitude: 15.0 N
using the geographic coordinate system "Mars 2000 Sphere"
Major and minor axes are 3396190.0 m
Also included is the *.prj file for the Mars 2000 Sphere GCS.  They are all located in ...\CoordinateSystems.

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File geodatabase contains one feature dataset:
1.) Stereographic_Chryse
    a) I2441_GeoUnits (polygon file)
    b) I2441_GeoContacts (polyline file)

These feature classes are grouped into “Mapping Layers” in the ArcMap project.  They are projected as MTM and should house all digitized map information.

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Raster layers are included in the folder I2694_5M_Hellas\Rasters, and include:
1.) I2441_ChrysePlanitia_crop.tif (436 mpp)

These feature classes are grouped into “Rasters” in the ArcMap project.  They are projected as MTM.

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Symbols are applied to each of the included feature classes. These symbols are adapted from USGS Open File Report 99-430 (Digital Cartographic Standard for Geologic Map Symbolization). These can be viewed and downloaded at http://pubs.usgs.gov/of/1999/of99-430/

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To add/remove symbols, open ArcMap project, right-click the feature class of interest, click “Properties”, and click “Symbology” tab. Highlight the symbol to alter and then click “Remove” or double-click to alter.  Each feature class has an associated *.lyr file that houses the symbologies.  Click “import” on the “Symbology” tab and navigate to the appropriate *.lyr to return to the full symbol list.

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We suggest that all work is contained within the *\Working folder. Create sub-folders as necessary to house relevant GIS data and map data.
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Comments are encouraged in order to assimilate beneficial GIS-based tools, datasets, and mapping approaches for future mappers.

contact:

Trent Hare
thare@usgs.gov

Jim Skinner
jskinner@usgs.gov

Corey Fortezzo
cfortezzo@usgs.gov

Marc Hunter
mahunter@usgs.gov