U. S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY ELEMENTS OF INFRASTRUCTURE AND SEISMIC HAZARD IN THE CENTRAL UNITED STATES - DATABASE digitally compiled by Susan Rhea Open-File Report 95-0241 [This document has been edited from the Open-File publication for viewing on the internet. It is typed in simple text format.] This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. USGS, Denver, CO, 80225 This database, identified as pp1538, has been approved for release and publica- tion by the Director of the USGS. Although the database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is re- leased on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. The database may be downloaded via 'anonymous ftp' from a USGS data server named greenwood.cr.usgs.gov (136.177.48.5). The files are located in a directory named /pub/open-file-reports/ofr-95-0241). The database manager is: Susan Rhea 303/273-8639 rhea@ gldvxa.cr.usgs.gov U.S. Geological Survey Box 25046, MS 966 Denver, CO 80225 This digital map database consists of the ESRI ARC/INFO Version 7.0.2 coverages used to generate the plates in Professional Paper 1538-M (1994). Total database size is 37.5Mb. Base-data is from 1:2,000,000-scale Digital Line Graph (DLG) data (roads, railroads, streams, water bodies, and international boundaries) and 1:100,000 scale DLG data (state and county boundaries). Original source and scale for other data are described in the coverage entries below. All coverages except sec06rr contain attribute information beyond the usual ARC/INFO attributes, and some covers contain annotation subclasses. The ARC/INFO generated attributes in- clude area and perimeter for polygon coverages, and internal control numbers and id numbers for point, arc, and polygon covers. Data used for the pipeline information is proprietary and used with permission. Original digital data from PennWell Publishing Company (1995) is available. The projection used is Albers Equal-Area, with central meridian at 88°W, and standard parallels at 29°30'N and 45°30'N. Latitude of the projection's origin is at 23°N. The scale of the published plates for this Professional Paper is 1:2,500,000. The EXPORT command was used to create the 'data.e00' files, using full compression. The IMPORT command will generate the ARC/INFO coverages for your use. A brief description of each coverage follows: alb96alb88.prj: projection file used to convert DLG to project projection pp1538cities: 53 cities; digitized on-screen matching published maps to digital road network point attributes: city = name capital = 1 for yes, 0 for no pop=1980 population, in thousands pp1538cnty: county and state lines; 1:100,000 scale DLG data arc attributes: bndytype = 1 for states, 2 for counties, 3 for international pp1538dams: 804 dams; digital data from Water Resources Division point attributes: self-explanatory, defined by Water Resources Division pp1538epri: 25 earthquakes with Modified Mercali Intensity > 5; digital data from Electric Power Research Institute point attributes:year, mon,day mag = moment magnitude, estimated for historical earthquakes from felt area pp1538geol: boundaries of Quaternary and Cenozoic-Mesozoic units; digitized from King and Biekman (1974), scale 1:2,500,000 polygon attributes: unit = Quat (Quaternary), Cz-Mz (Cenozoic- Mesozoic), or water pp1538grat: graticule for study area; generated in decimal degrees pp1538grattic: graticule tic marks; generated in decimal degrees pp1538mmi: outlines of hypothetical Modified Mercali Intensity values; digitized from Algermissen and Hopper (1985), scale about 1:6,670,000 polygon attributes: mmi = VI through X pp1538nukes: 44 facilities housing significant nuclear material; digitized from U.S. Geological Survey maps, scale about 1:7,500,000 point attributes: type = character description x-coord and y-coord in decimal degrees pp1538rds: selected interstate and first class roads, 1:2M DLG data arc attributes: see National Mapping Program (NMP) data users guide pp1538rr: all railroads except those in sec06, 1:2,000,000 DLG data arc attributes: see NMP data users guide pp1538sec06rr: sec06 railroads, 1:2,000,000 DLG data, NOTE -- no attribute codes pp1538str: all streams, 1:2,000,000 DLG data, not used in final version arc attributes: see NMP data users guide polygon attributes: see NMP data users guide pp1538usa: usa national borders; 1:2,000,000 DLG data arc attributes: see NMP data users guide pp1538wb: outlines of large water bodies (oceans, Great Lakes); 1:2,000,000 DLG data polygon attributes: none REFERENCES Algermissen, S.T., and Hopper, M.G. 1984, Estimated maximum regional seismic intensities associated with an assemblage of great earthquakes that might occur along the New Madrid seismic zone, east-central United States: U.S. Geological Survey Miscellaneous Field Studies Map MF-1712, 1 sheet, scale about 1:3,770,000. King and Biekman, Geologic Map of the United States (exclusive of Alaska and Hawaii): U.S. Geological Survey 1974, 3 sheets, scale 1:2,500,000. National Mapping Program, 1990, Digital Line Graphs from 1:2,000,000-scale maps: U.S. Geological Survey, Data Users Guide 3, 70 p. PennWell Publishing Company, 1995, Natural gas pipelines of the United States and Canada: Tulsa, Oklahoma, Topographic Mapping Company, digital database. -----1995, Products pipelines of the United States and Canada: Tulsa, Oklahoma, Topographic Mapping Company, digital database. -----1995, Crude oil pipelines of the United States and Canada: Tulsa, Oklahoma, Topographic Mapping Company, digital database. Wheeler, R.L., Rhea, Susan, and Tarr, A.C., 1994, Elements of infrastructure and seismic hazard in the central United States, in Shedlock, K.M., and Johnston, A.C., eds., Investigations of the New Madrid seismic zone: U.S. Geological Survey Professional Paper 1538-M, 3 plates, scale 1:2,500,000, 61p. ACKNOWLEDGEMENTS Compilation of digital data base assisted by Mike Crane and Art Tarr. Data contributions from Water Resources Division, PennWell Publishing Company, Electric Power Research Institute, and other U.S. Geological Survey scientists is greatly appreciated. This work was supported by the U.S. Geological Survey National Earthquake Hazard Reduction Program.