Digital Database for Global Geologic Map of Europa By Erin J. Leonard, D. Alex Patthoff, and David A. Senske --------------- Rationale and Intent: First discovered by Galileo Galilei more than 400 years ago and imaged in detail by Voyager 2 in 1979, Jupiter’s icy moon Europa has been a source of fascination as a result of a range of scientific investigations that suggest it contains the key ingredients for habitability. Investigations of Europa’s geology show that its surface is geologically complex and, on the basis of the dearth of impact craters, interpreted to be as young as ~60 Ma. Establishing the global context of the distribution and timing of European geologic units forms a basis to understand regional and local scale processes, serves as a tool for the planning of future missions, and most of all, is essential to gaining insight into the potential habitability of this icy world. --------------- 1.) Unzip or copy folder to your hard drive 2.) Two versions exist in the root directory, one for ArcGIS Pro version 2.9("sim3513_Europa_FINAL_2.9.aprx”) and version 3.0 (“sim3513_Europa_FINAL_3.0.aprx”), respectively. Run the appropriate .aprx file for the ArcPro version used from the root directory. Simple grid has been added to the Layout as shapefiles, but it has not been clipped because this slows down drawing while in edit mode. Extent clipping should only be turned on after all editing is complete; it can be turned on/off in the Data Frame tab of the data frame Properties window. ---------------- Please visit the PDS for image footprints. USGS's PILOT: http://pilot.wr.usgs.gov/index.php?view=downloads Wash U's PDS ODE: http://ode.rsl.wustl.edu/mars/indextools.aspx (you will want the *c0a.zip files - clon=0). ---------------- Three project-specific data frames are projected (meters). Projection: Mercator Latitude_of_Origin: 0.0 N Longitude_of_Origin: 180.0 E using the geographic coordinate system "Europa 2000 Sphere" Major and minor axes are 1562090.0 m This file is included in ..\CoordinateSystems\(*.prj) Projection: South Polar Stereographic Latitude_Of_Origin: -90.0 N Longitude_of_Origin: 180.0 E using the geographic coordinate system "Europa 2000 Sphere" Major and minor axes are 1562090.0 m This file is included in ..\CoordinateSystems\(*.prj) Projection: North Polar Stereographic Latitude_Of_Origin: 90.0 N Longitude_of_Origin: 180.0 E using the geographic coordinate system "Europa 2000 Sphere" Major and minor axes are 1562090.0 m This file is included in ..\CoordinateSystems\(*.prj) ---------------- File geodatabase contains one feature dataset: 1.) Europa_Global a) LocationFeatures_FINAL (point file) b) LinearFeatures_FINAL (polyline file) c) GeoContacts_FINAL (polyline file) d) GeoUnits_FINAL (polygon file) e) Europa_Annotation (Annotation file) f) GeoUnits_15kAnno (Annotation file) g) GeoUnits_NP_Anno (Annotation file) h) GeoUnits_SP_Anno (Annotation file) Feature classes (a) through (d) are grouped into ”Geology”, and classes (e) through (h) are grouped into “Graticule_Annotation” in the ArcGIS Pro project. They are projected as orthographic and should house all digitized map information. ---------------- Raster layers are included in the folder ..\Rasters\, and include: 1.) Europa_Voyager_GalileoSSI_global_mosaic_500m_SpFill.tif (500 m/pix) 2.) Europa_np_500m.tif 3.) Europa_sp_500m.tif These feature classes are grouped into “Rasters” in the ArcGIS Pro project. They are projected as Europa Simple Cylindrical. ---------------- Shapefiles a) Boundary_Mercator_DD.shp b) Boundary_NP_DD.shp c) Boundary_SP_DD.shp d) Grid_30x30_DD.shp e) LocationFeatures_FINAL.shp f) LinearFeatures_FINAL.shp g) GeoContacts_FINAL.shp h) GeoUnits_FINAL.shp ---------------- 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 https://ngmdb.usgs.gov/fgdc_gds/geolsymstd.php We have two generic attributes for each layer which are currently using non-standard symbols. These can be used as place holders for features currently not defined. Included FGDC.stylx style file for symbology. --------------- To add/remove symbols, open ArcGIS Pro project, right-click the feature class of interest and click “Symbology” to open the symbology pane. 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 on the three vertically stacked lines in the top right corner of the window and choose “Import symbology.” Navigate to the appropriate .lyrx file to return to the full symbol list. ---------------- We suggest that all work is contained within the ..\Working\ folder. Create sub-folders as necessary to house relevant GIS data and map data. ---------------- Right-click on the file geodatabase and click the "DOMAINS" tab to see the attribute domains. These can be altered, if required. ---------------- Comments are encouraged to assimilate beneficial GIS-based tools, datasets, and mapping approaches for future mappers. contact: Sarah Black sblack@usgs.gov Corey Fortezzo cfortezzo@usgs.gov Holly Buban hbuban@usgs.gov Jim Skinner jskinner@usgs.gov