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General Listing
Title of Listing:
Miscellaneous Investigations Series Maps (I Series)
Category:
Maps/Geographic Data
Subcategory:
US Geological Survey-USGS, All Listings
Date:
Document #:
Web Site:
http://www.fgdc.gov/FGDP/Misc_Investigations_Series_Maps_(I_Series).html
Email:
custserv@edcmail.cr.usgs.gov
Abstract:

Maps (mostly multicolored) on planimetric or topographic bases showing regular and irregular areas; various scales. This series portrays a wide variety of format and subject matter including bedrock, surficial, and marine geology, engineering geology, mineral and energy resources, and geophysics. The series also includes maps of the Earth's Moon and other planetary bodies.

          Maps in the I Series are similar in scientific quality and cartographic standards to maps in the GQ Series, but the I Series accommodates a greater range of map types than the GQ Series for several reasons:

          1. The I-Series map need not cover only a single 7 1/2- or 15-minute quadrangel. The area covered may be greater or less than a whole quadrangle, or may be a mosaic of several quadrangles, at any scale. Many I-Series maps are published at a scale of 1:100,000 or 1:250,000 using standard 30- by 60-minute or 1- by 2-degree topographic base maps, respectively.

          2. The publication scale may differ from that of the published topographic base, or the base used may incorporate obsolete or outdated topographic quadrangles if the geologic map has been prepared to fit it.

          3. The map need not conform to all the standards set for general-purpose geologic maps. Thus, many I-Series maps are special-purpose maps showing selected types of features or information such as faults, landslides, or mineral resource potential.

          Consequently, the I Series includes both black-and-white and multicolored products and such diverse topical material as bedrock and surficial geology, bathymetry, vegetation, landforms, hydrogeology, land classification, map projections, quality of water, and maps of the Moon, planets, and other satellites. Many I-Series maps are general-purpose geologic maps similar in content to Geological Quadrangle (GQ)-Series maps but cover areas other than a 7 1/2- or 15-minute quadrangle and / or are printed on a topograhic base map that has been either reduced or enlarged from the published scale. Many I-Series maps published before 1961 are photogeologic maps that were compiled from aerial photographs with little or no field checking.

          I-Series maps are accompanied by a description of map units that describes the distinctive characteristics and principal variations in the map units, and, in many cases, by a supplemental text.

          USGS Information Services accepts fax and mail orders only.

          Visit the USGS at http://edcwww.cr.usgs.gov/webglis or http://mapping.usgs.gov
Topics
Geophysics, Mapping/GIS, Mining/Minerals

Additional Topics/Tags/Keywords
Geology, Geophysics, Gravity, Marine, Seismic, Minerals

Organization:
US Department of the Interior (DOI), US Geological Survey (USGS)
Address:
Information Services
Box 25286
Phone:
DescriptionNumber
City:
Denver
1.
Information Services (800) 435-7627
State/Province/Territory:
CO
2.
Earth Science Information Center(800) 872-6277
Zip/Postal Code:
80225
3.
EROS Data Center(605) 594-6151
Country:
United States
4.
Fax: Information Services (303) 202-4693
Branch Locations: