Questions, comments, suggestions? This standard allows the use of any symbol that doesn't conflict with others in the standard, provided that it is clearly explained on the map and in the database. Be aware, however, that reducing lineweights below .125 mm (.005 inch) may cause symbols to plot incorrectly if output at higher resolutions (1800 dpi or higher). FGDC DIGITAL CARTOGRAPHIC STANDARD FOR GEOLOGIC MAP SYMBOLIZATION . topographic map, called provisional, some symbols and lettering are hand- drawn. However, the map symbols have been reorganized and the number of symbols has increased from about 800 to almost 1200. The revised standard document was submitted to the FGDC for final approval in July 2005. In certain situations, a symbol or its usage might need to be modified in order to better represent a particular feature on a geologic map or cross section. In addition, the earlier PostScript Implementation of the Public Review Draft of the standard (USGS Open-File Report 99-430, "Public Review Draft – Digital Cartographic Standard for Geologic Map Symbolization (PostScript Implementation)") has been updated to reflect changes in the now-approved standard, and the revised PostScript Implementation is presented herein as USGS Techniques and Methods 11-A2. These PDF files can be downloaded or, depending on browser settings, viewed by clicking the "PDF" links below. Basics Table--Geologic Map Symbols Created by Ralph L. Dawes, Ph.D. and Cheryl D. Dawes, including figures unless otherwise noted updated: 7/10/11 Unless otherwise specified, this work by Washington State Colleges is licensed under a Creative … Note: some sections containing more than one EPS file have been placed in a ZIP archive. Accessible from the links below are Illustrator EPS files of each section, provided in both Illustrator 8 ("AI8") and "CS2" formats. U.S. Department of the Interior U.S. Geological Survey Reading Topographic Maps Interpreting the colored lines, areas, and other symbols is the fi rst step in using topographic maps. The standard is scale-independent, meaning that the symbols are appropriate for use with geologic mapping compiled or published at any scale.

Please contact Entire standard document (and all the symbols in Appendix A), in addition to the CMYK Color Chart and Pattern ChartEntire standard document (and all the symbols in Appendix A), but without the CMYK Color Chart and Pattern ChartIndex to the symbols in Appendix A and to the topics in the introductory textSection 3 - Boundaries Located by Geophysical SurveysSection 17 - Landslide and Mass-Wasting FeaturesSection 21 - Neotectonic and Earthquake-Hazard FeaturesSection 23 - Miscellaneous Uplift and Collapse FeaturesSection 30 - Topographic and Hydrographic FeaturesSection 32 - Geologic Age Symbol Font ("FGDCGeoAge") This standard is intended to provide to the Nation's producers and users of geologic-map information a single, modern standard for the digital cartographic representation of geologic features.

The objective in developing this national standard for geologic map symbols, colors, and patterns is to aid in the production of geologic maps and related products, as well as to help provide maps and products that have a consistent appearance.The standard provides descriptions, examples, cartographic specifications, and notes on usage for a wide variety of symbols that may be used on a typical digital geologic map or related product (for example, cross sections). Geological Map Symbols inclined strata, dip in degrees horizontal strata vertical strata axial surface trace of antiform axial surface trace of synform fold hinge line, fold axis or other linear structure, plunge in degrees inclined cleavage, dip in degrees horizontal cleavage vertical cleavage geological boundary fault line, mark on downthrow side younging direction of beds metamorphic aureole Geologic Map Symbolization. Features are shown as points, lines, or areas, depending on their size and extent. It also is suitable for use in electronic publications (for example, in a Portable Document Format (PDF) file) and for display by computer monitors. In August 2006, the Digital Cartographic Standard for Geologic Map Symbolization was officially endorsed by the Federal Geographic Data Committee (FGDC) as the national standard for the digital cartographic representation of geologic map features (FGDC Document Number FGDC-STD-013-2006). For guidelines on symbol usage, as well as on color design and map labeling, please refer to the standard's An ArcGIS 10 version is available. More information The FGDC Digital Cartographic Standard for Geologic Map Symbolization contains descriptions, examples, cartographic specifications, and notes on usage for a wide variety of symbols that may be used on typical, general-purpose geologic maps and related products such as cross sections.
To assist in the review of this standard during its development, a Public Review Draft standard document ("Public Review Draft – Digital Cartographic Standard for Geologic Map Symbolization") was released in May 2000.
The final standard document was formally approved as an FGDC standard in August 2006. More information on both the past development and the future maintenance of the FGDC Digital Cartographic Standard for Geologic Map Symbolization can be found at the FGDC Geologic Data Subcommittee website ( The standard is provided here in PDF format, which is best for viewing and plotting. To the extent possible, symbols and specifications were retained from previous informal and draft standards (the USGS "Technical Cartographic Standards", ca.


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