Physical Geography

(GB:3-649 )
G-Geography H-Social Sciences J-Political Science K-Law

GB 54.5 General Works, Treatises and Advanced Textbooks. 1975-

USGS Global Land Information System

USGS Global Land Information System (GLIS) is an "...interactive computer system developed by the U.S. Geological Survey (USGS) for scientists seeking sources of information about the Earth's land surfaces. GLIS contains abstract, description, and search information for each data set. Through GLIS, scientists can evaluate data sets, determine their availability, place online requests for products, or, in some cases, download products. GLIS also offers online samples of earth science data."
At the top of the site's main page are links to the EROS Data center, a system message, new information area, a related sites lists, a price list for documents, and a help area. Within the main page, general information on GLIS is found, as well as a listing of data types within the site: (1) all; (2) digital cartographic data; (3) digital climate data; (4) digital elevation data; (5) digital geologic data; (6) digital hydrologic data; (7) digital land use/landcover data; (8) digital satellite and aerial data; (9) digital soils data; (10) photographs; (11) printed maps; and (12) thematic regional data.
To view information concerning a data set, a user should first select the applicable link from the site's main page; a user must then select a dataset type from the provided table and also select the form of information which will compose the results: (1) abstract; (2) description; (3) search; and (4) prices. After selecting a data form and a dataset from the table, the user will find search results reflecting the requested form. For "abstract" results, the user will find a written description of the dataset, designed to present general information on attributes (keywords, parameters, distribution media), data center contact information, personnel information, and data references. The "description'; results form produces a document with a table of contents, discussing the dataset in technical terms. Titles within the contents are direct links to their respective texts.
"Search" results offer a document discussing inventory information on the dataset; an ordering form is provided. Lastly, "prices" offers estimated product prices for copies of the dataset, which is available in many subdivided topic forms. At the bottom of the site's main page is a link to the EDC homepage and to e-mail the EDC. The site is sponsored by the USGS and the EROS Data Center (EDC); Sioux Falls, South Dakota.
To Search:
Select link of interest from site's main page; select dataset of interest from table and results form type. Scroll to view matching results.