SIM3383_readme.txt

These files constitute the digital database, in GIS format, for USGS 
SIM 3383, "Surficial Geologic Map of Berrien County, Michigan, and the
Adjacent Offshore Area of Lake Michigan" by By Byron D. Stone, 
Kevin A. Kincare, Dennis W. O’Leary, Wayne L. Newell, Emily M. Taylor, 
Van S. Williams, Scott C. Lundstrom, Jared E. Abraham, and Michael H. Powers

The database represents the majority of the information displayed on sheet 1
of the map (excluding cross sections and correlation of map units). It is 
recommended that users of the geodatabase read the complete publication 
(sheets 1 and 2, and the explanatory pamplet). The geodatabase is 
presented in three formats:

1) SIM3383_GeMS.zip: Contains SIM3383.gdb, an ESRI ArcGIS v. 10.5 
file geodatabase laid out in accordance with the GeMS (formerly known 
as NCGMP09) database schema. A description of this schema is available at 
http://ngmdb.usgs.gov/Info/standards/NCGMP09/. FGDC-style metadata for 
each element of the geodatabase (table, feature dataset, feature 
class) are stored within the geodatabase. The zip file also includes 
report-level metadata, an ESRI .mxd file that describes a map image 
similar to that in .pdf; .lyr files, and a RESOURCES 
folder that contains an ESRI .style file, a browse graphic (.jpg). 

2) SIM3383-open.zip: A complete, automatic translation of 
SIM3383.gdb into shapefiles, dbf files, and pipe-delimited text 
files for fields longer than 255 characters. Logfile.txt documents how 
fields were renamed to fit within the 10-character fieldname-length 
limitation of the shapefile format. Also contains report-level 
metadata and the .lyr files. This complete version of the database 
contains all the content of the native geodatabase transcribed into 
well-documented, stable file formats. 

3) SIM3383-simple.zip. Automatic translation of MOST of the contents 
of SIM3383.gdb into simple flat shapefiles. An easy to use, though 
incomplete, version of the database. The zip file also contains 
report-level metadata and the .lyr files. 

These files, as well as a PDF file for a publication-quality image of 
the map sheet, are available at https://doi.org/10.3133/sim3383.

Note that digital base maps are not contained in any of these files. 


Mary DiGiacomo-Cohen
U.S. Geological Survey
101 Pitkin St.
East Hartford, CT 06108
mdicohen@usgs.gov