Conference Papers
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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
Filter Total Items: 5321
A national perspective of Louisiana's coastal wetlands loss
No abstract available
Authors
Robert E. Stewart
Volcanic rocks as sources of uranium: Current perspective and future directions
No abstract available.
Authors
Robert A. Zielinski
Automated derivation of hydrologic basin characteristics from digital elevation model data
Digital elevation model (DEM) data in a raster format can be used to automatically derive the drainage characteristics of an area. A procedure has been designed that is capable of operating on matrices of elevation data having no algorithmically imposed size limit, while performing within the resolution and accuracy tolerances of the DEM data. Each cell is processed as the center of a 3- by 3-cell
Authors
Susan K. Jenson
A relational approach to vector data structure conversion
The proliferation of geographic information systems and digital data bases is creating a need for efficient methods to convert data from one spatial data structure to another. One approach is to create ad hoc interfaces, with a potential of N(N-1) interfaces for N data structures. Using an intermediate data structure, at most 2N interfaces are required. An intermediate relational data structure is
Authors
Jan W. van Roessel, Eugene A. Fosnight
Simulation of ground-water flow in the Prairie du Chien-Jordan aquifer and relation to ground-water contamination by coal-tar derivatives, St. Louis Park, Minnesota
No abstract available.
Authors
J. R. Stark, M. F. Hult
Collapse and erosion at the low-level radioactive-waste burial site near Sheffield, Illinois
No abstract available.
Authors
J. R. Gray, L. L. McGovern
On the interpretation of satellite-derived gravity and magnetic data for studies of crustal geology and metallogenesis
Satellite-derived global gravity and magnetic maps have been shown to be useful in large-scale studies of the Earth's crust, despite the relative infancy of such studies. Numerous authors have made spatial associations of gravity or magnetic anomalies with geological provinces. Gravimetric interpretations are often made in terms of isostasy, regional variations of density, or of geodesy in general
Authors
David A. Hastings
Estuary-wide mitigation options for port development in Tampa Bar, Florida
No abstract available.
Authors
Steve Dial, Millicent L. Quammen, Don Deis, James B. Johnston
Landsat-faciliated vegetation classification of the Kenai National Wildlife Refuge and adjacent areas, Alaska
A Landsat-based vegetation map was prepared for Kenai National Wildlife Refuge and adjacent lands, 2 million and 2.5 million acres respectively. The refuge lies within the middle boreal sub zone of south central Alaska. Seven major classes and sixteen subclasses were recognized: forest (closed needleleaf, needleleaf woodland, mixed); deciduous scrub (lowland and montane, subalpine); dwarf scrub
Authors
Stephen S. Talbot, M.B. Shasby, T.N. Bailey
Comparison of fire fuel maps produced using MSS and AVHRR data
The fuel information, in support of the Bureau of Land Management's (BLM) national fire program, has been obtained through the manila interpretation of Landsat multi-spectral scanner images and digital image analysis of Advanced Very High Resolution Radiometer (AVHRR) data. The BLM, in cooperation with the Earth Resources Observation Systems Data Center, determined that the accuracy (approximatel
Authors
Wayne A. Miller, David C. Johnston
Change detection in rangeland environments using Landsat MSS data: A quantitative approach
A range forage utilization study on the Crow Creek Indian Reservation in central South Dakota provided the opportunity to use Landsat multispectral scanner (MSS) data for examining range condition trends. A procedure was developed to compare change in spectral reflectance over time for polygon areas, defined by resource type within management units. A t-test was used to evaluate changes in brigh
Authors
David C. Johnston, Robert H. Haas
Updating range surveys using a geographic information system
A spatial database was developed for the Fort Berthold Indian Reservation in North Dakota to demonstrate the use of a geographic information system for natural resource management. A key component of the digital database was a detailed soil survey. Range site boundaries were derived by aggregating soil mapping units on the basis on interpretations from the published soil surveys. The problem wa
Authors
Jeffery C. Eidenshink, David C. Sjaastad