 |
 |
 |
|
Title: Preliminary geologic map of the Emigrant Pass quadrangle, Eureka County, Nevada
Author: Christopher D. Henry and James E. Faulds
Year: 1999
Series: Open-File Report 1999-09z
Version: 1999, revised July 2, 2001
Format: digital file only: 322 MB (includes PDF, 40.5 x 27.5 inches, color plate)
Scale: 1:24,000
A preliminary 1:24,000-scale color geologic map of the Emigrant Pass 7.5-minute quadrangle in Eureka County, Nevada, with two cross sections and descriptions of 47 rock units.
ReadMe file for the GIS data:
November 6, 2015 (updated February 17, 2016)
This directory contains the digital version of the geologic map and related data for the Preliminary Geologic Map of the Emigrant Pass Quadrangle, Eureka County, Nevada: NBMG Open-File Report 1999-09.
Please read the METADATA for detailed information on the geology in the METADATA directory. The METADATA for the USGS files (DRGs) can be found on the FGDC metadata clearinghouse (http://www.fgdc.gov).
This digital conversion project was undertaken by the Nevada Bureau of Mines and Geology in cooperation with the U.S. Geological Survey STATEMAP Program.
Folders containing files:
of1999-09z
|\data
| |\geodatabase (contains the ESRI geodatabase files for the map)
|
| |\images (contains different types of images)
| |\DRG (USGS Digital Raster Graphgics file of the area mapped)
| |\georeferenced (georeferenced map that was converted to GIS)
| |\Original (original paper map)
|
| |\layerfiles (ESRI ArcGIS layer files of each layer in the table of contents of the ArcMap MXD file)
|
| |\shapefiles (ESRI shape files for each layer in the ArcMap table of contents of the ArcMap MXD file)
|
| \docs (metadata folder)
| |\metadata (contains the metadata as a text file (.txt) for the following:
| | Geodatabase
| | FeatureDataSet
| | Each FeatureClass in the Geology FeatureDataSet
|
|\maps (contains the final ESRI ArcGIS 10.1 ArcMap MXD file, and PDF of final map).
The symbol and image files listed above contain graphic symbol information about associated line, point, and polygon features found on the published map but that may not have been fully identified in the present format of the feature line, point, or polygon attribute file. The layer files are provided here for use with the geologic map digital conversion as an aid to a graphic presentation of the full data set. The files can be utilized in ESRI ArcGIS 10.1 SP1 version.
Conversion Process:
The original paper map that had been scanned on a large format table scanner, then the .tiff image was georeferenced using 4 reference points. Then, the map was digitized using ArcGIS ArcMap 9.3.1 for all features (lines, points, and cross sections). Then, polygons (GeoPolys) were created from the lines (GeoLines) and points (GeoPoints) to define the geologic unit polygons. Other point features on the printed map were digitized as points (GeoPoints) and defined using a definition query to define the type of point. Line errors were checked using two rules of topology: Lines Must Not Have Dangles, Lines Must Not Have Pseudo Nodes. The features were digitized in real world coordinates with the projection of: UTM projection, units in meters, zone 11, and a datum of NAD83. Polygon units (GeoPoints) were digitized and attributed in ArcGIS 9.3.1 and joined to the domain database. All digitizing work was checked for accuracy by staff members other than the person originally doing the work.
THE GEOLOGIC INFORMATION SHOULD BE CONSIDERED PRELIMINARY. IT HAS NOT BEEN EDITED OR CHECKED FOR COMPLETENESS OR ACCURACY.
Original Product Code: OF999z
|
|
|
 |
|
 |
|
|
|
