MIL-DTL-89045A (1)

Abstract

This detail specification defines the content and format for the National Geospatial-Intelligence Agency (NGA) Geospatial Symbols for Digital Displays (GeoSym). Although the GeoSym development was undertaken specifically to support the display of Vector Product Format (VPF) data encoded with the Feature and Attribute Coding Catalogue (FACC), the graphic files and symbol assignment files which make up GeoSym may be used with data which is not encoded in FACC if a mapping from the native encoding scheme to the FACC equivalent can be made. <br><u>Purpose</u>. This detail specification defines the format and content of the symbol assignment files that comprise the GeoSym product. For the format and content of the symbol files, refer to the Symbols and Annotation for Maps and Imagery or the Military Handbook, Geospatial Symbols for Digital Displays.<b><u>Intended Use:</u></b> GeoSym is intended to support the electronic display of VPF data. This specification is designed for use with colordisplay devices. Use with non-color or grayscale display devices may not yield the intended results and is therefore inappropriate. Even though this specification is intended for softcopy map displays, certain limited uses for hardcopy map production may be suitable. (See MIL-HDBK-857A, Sections 4.1.1.2 and 4.1.7). GeoSym may also be used to provide a geospatial context to operational symbology. MIL-STD-2525, Common Warfighting Symbology provides a wide range of standard symbols for items of interest in the conduct of military operations. GeoSym can provide the geolocational aspects of an integrated display, to visualize to the user where the activity of interest is occurring. This product is intended for use by military and civilian branches of the government. GeoSym is a registered trademark of the U.S. Government, National Geospatial-Intelligence Agency.<br>