GB 54.5 General Works, Treatises and Advanced Textbooks. 1975-
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
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.
Select link of interest from site's main page; select dataset of interest
from table and results form type. Scroll to view matching results.