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Publications

Here you will find publications, reports and articles produced by the National Geospatial Program (NGP) scientists. For a comprehensive listing of all USGS publications please click the button below.

Filter Total Items: 182

An interface between the Agricultural Non-Point Source (AGNPS) pollution model and the ERDAS Imagine Geographic Information System (GIS)

The U.S. Department of Agriculture developed the Agricultural Non-Point Source (AGNPS) pollution model. The AGNPS pollution model simulates the behavior of runoff, sediment, and nutrient transport from watersheds that have agriculture as their prime use. This model has been used extensively by scientists conducting hydrologic or water quality analyses using computer modeling in an attempt to furth
Authors
Michael P. Finn, E. Lynn Usery, Douglas J. Scheidt, Gregory M. Jaromack, Timothy D. Krupinski

The manly map: the English construction of gender in early modern cartography

Questions of gender in cartography most often focus on the sex of people involved in the cartographic process. These areas of research include the history of women cartographers (Tyner 1997: 46; Ritzlin 1989: 5; Hudson 1989: 29), the cartography of issues centered on women (Seager and Olson 1986; Seager et al. 1997; Rocheleau et al. 1995: 62), and women in the cartographic labor force (McHaffie 19
Authors
Dalia E. Varanka

Emergency assessment of potential debris-flow peak discharges, Coal Seam fire, Colorado

These maps present the results of assessments of peak discharges that can potentially be generated by debris flows issuing from the basins burned by the Coal Seam fire of June and July 2002, near Glenwood Springs, Colorado. The maps are based on a regression model for debris-flow peak discharge normalized by average storm intensity as a function of basin gradient and burned extent, and limited fie
Authors
Susan H. Cannon, John A. Michael, Joseph E. Gartner, Alan H. Rea, Steven P. Garcia

Report of the River Master of the Delaware River for the period December 1, 1998-November 30, 1999

No abstract available.
Authors
Bruce E. Krejmas, Gary N. Paulachok, William J. Carswell

Improving the quality of mass produced maps

Quality is critical in cartography because key decisions are often made based on the information the map communicates. The mass production of digital cartographic information to support geographic information science has now added a new dimension to the problem of cartographic quality, as problems once limited to small volumes can now proliferate in mass production programs. These problems can als
Authors
Jeffrey D. Simley

All equal-area map projections are created equal, but some are more equal than others

High-resolution regional and global raster databases are currently being generated for a variety of environmental and scientific modeling applications. The projection of these data from geographic coordinates to a plane coordinate system is subject to significant areal error. Sources of error include users selecting an inappropriate projection or incorrect parameters for a given projection, algori
Authors
E. Lynn Usery, Jeong Chang Seong

A raster approach to topographic map revision

No abstract available.
Authors
E. Lynn Usery, R. Welch