U. S. DEPARTMENT OF THE INTERIOR

U.S. GEOLOGICAL SURVEY






DIGITAL FILES OF GEOLOGIC MAP SYMBOLS

 WITH CARTOGRAPHIC SPECIFICATIONS

 



By

U.S. Geological Survey




Open-File Report 95-526






Prepared in cooperation with the Federal Geographic Data Committee, Geological Data Subcommittee, and the Association of American State Geologists





Although program tests have been made, no guarantee, expressed or implied, is made by the U.S. Geological Survey regarding program correctness, accuracy or proper execution.  Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.  This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards.



Reston, Virginia

1995


Digital Files of Geologic Map Symbols with Cartographic Specifications

Open-File Report 95-526


AVAILABILITY

Open-File Reports can be purchased at the address given below.

U.S. Geological Survey
Information Services
Box 25286
Denver, Colorado 80225-0286
Telephone 303-236-7476

CONTENTS OF THIS FILE

Introduction.

Nearly 900 symbols with cartographic specifications for geologic map are provided on the two diskettes that constitute U.S. Geological Survey Open-file Report 95-526.  The symbols were prepared for U.S. Geological Survey Open-file Report 95-525, "Cartographic and Digital Standard for Geologic Map Information."  Symbols on the diskettes should be used in conjunction with the printed draft standard for it explains the application and proper use of the symbols as well as the content and the color and pattern standards for geologic maps.

Acknowledgments.

Information contained on the diskettes is the product of work by the Geologic Map Standards Committee of the U.S. Geological Survey with cooperation from the Association of American State Geologists and the Federal Geographic Data Committee, Geological Data Subcommittee. Mitchell W. Reynolds chaired the Subcommittee at the time the standard was developed.  Members of the Geologic Map Standards Committee include:

	Mitchell W. Reynolds, Chairman
	James E. Queen
	Richard B. Taylor
	Nicholas M. Ratcliffe
	William E. Scott
	George E. Ulrich
	Philip A. Davis
	Edward C. Escowitz
	John Davis  (Kansas Geological Survey, representing the
				Association of American State Geologists)

James E. Queen, Cartographer, prepared the symbols and specifications.  He coordinated the computerized drafting of the symbols by Michael Kirtley, Conifer, Colorado.  Mr. Kirtley worked under contract to the U.S. Geological Survey.  Symbols and specifications contained herein are in the public domain and cannot be copyrighted.
	
Section 1.  Organization of the electronic files

Geologic map symbols represented in these files are organized in sheets, each sheet containing 20-38 symbols and their cartographic specifications.  The sheets can be represented on a computer screen or as paper copy from a printer that will accept encapsulated postscript files.  Individual symbols can be separated as objects in individual digital files and exported for use on digital maps.  Each symbol is identified by a reference number that coincides with the symbol reference number in Open-file report 95-925, "Cartographic and Digital Standard for Geologic Map Information," pages 2.1-1 through 2.1-84. Table 1 below lists the symbol reference number in Open-file report 95-525 by sheet number in diskettes of Open-file report 95-526.

In the column labelled "Symbol," each symbol is shown at full scale as on a geologic map at a scale of 1:24,000 or 1:100,000.  The symbols should not be enlarged for application at scales larger than 1:24,000, nor reduced for application at scales smaller than 1:100,000.  See the text of Open-file report 95-925, pages 2.1.0-1 through 2.1.0-4 for guidance regarding the application of symbols on maps of different scales.


Section 2.  Hardware and Software Requirements

The geologic map symbols contained in the files are in encapsulated postscript format (eps).  They can be imported into a variety of commercially available digital drafting programs, such as, but not limited to, Adobe Illustrator, Corel Draw, and AutoCAD.  The symbols can be displayed and used through such programs on IBM-compatible or Macintosh-compatible personal computers.  The symbols may be printed on a compatible printer.  However, the printer must have the capability of printing eps files. 

Fonts required by the map standard must be available on the printer or within the drafting program for correct rendering of a symbol and its cartographic specifications.  Scalable fonts required are:
			Univers  (U)
			Univers inclined (UI)
					(known also as Univers italic)
			Souvenir (S)
			Souvenir medium (SM)

Other fonts that in some programs may substitute for the fonts listed above, such as Helvetica or Arial for Univers, or Times Roman or Palatino for Souvenir, may not print correctly or may not print.


Section 3.  Cross Reference

Reference numbers for symbols in U.S. Geological Survey Open-file Report 95-525, "Cartographic and Digital Standard for Geologic Map Information," are listed below by sheet number in Open-file Report 95-526.

			Symbol Number			Sheet Number

	Diskette 1 of Open-file Report 95-926

		2.1.1   through 2.1.26			 1
 		2.1.27  through 2.2.22			 2
		2.2.23  through 2.4.3			 3
		2.4.4   through 2.5.22		 	 4
		2.5.23  through 2.7.15		 	 5
		2.7.16  through 2.9.9			 6
		2.10.1  through 2.14.2			 7
		2.14.3  through 2.15.18			 8
		2.16.1  through 2.18.7			 9
		2.18.8  through 2.20.5			10
		2.20.6  through 2.23.5			11
		2.23.6  through 2.24.5			12

	Diskette 2 of Open-file Report 95-926

		2.24.6  through 2.26.22			13
		2.26.23 through 2.26.61			14
		2.27.1  through 2.30.4			15
		2.30.5  through 2.32.3			16
		2.33.1  through 2.33.29			17
		2.33.30 through 2.35.21			18
		2.35.22 through 2.36.6			19
		2.5.26  through 2.38.12			20
		2.38.13 through 2.39.24			21
		2.39.25 through 2.41.7			22
		2.41.8  through 2.44.2			23
		2.44.3  through 2.45.3			24
		2.45.4  through 2.48.6			25
		2.48.7  through 2.49.10			26
		2.50.1  through 2.52.3			27
		2.52.4  through 2.58.1			28
