Geologic Map of the Lavinia Planitia Quadrangle (V-55), Venus
GIS version
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Rationale and Intent:
This geologic map was originally authored by Mikhail A. Ivanov and James W. Head, III in 2001, and has been digitized as a GIS product for public release.  Please use the original citation:

Ivanov, M.A., and Head, J.W., III, 2001, Geologic map of the Lavinia Planitia quadrangle (V–55), Venus: U.S. Geological Survey Geologic Investigations Series I–2684, available at http://pubs.usgs.gov/imap/i2684/.

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Project specific datasets are projected (meters).
Projection: Lambert Conformal Conic
            Central meridian: 165.0 E (-15.0 W)
using the geographic coordinate system "Venus 2000 Sphere"
Major and minor axes are 6051800.0 m
Also included is the *.prj file for the Venus 2000 Sphere GCS.  They are all located in ../CoordinateSystems/.

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File geodatabase contains one feature dataset:
1.) V55_Lambert_neg15
    a) GeoContacts_i2684 (polyline file)
    b) GeoUnits_i2684 (polygon file)

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

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Raster layers are included in the folder I2684_5M_Lavinia/Rasters/, and include:
1.) I2684.tif (423 mpp)
2.) I2684_red50.tif (mpp)

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

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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