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Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.

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Area-preserving simplification of polygon features Area-preserving simplification of polygon features

Developing simplified representations of a two-dimensional polyline is an important problem in cartographic data analytics where datasets must be integrated across spatial resolutions. This problem is generally referred to as line simplification, and is increasingly driven by preservation of specific analytic properties such as positional accuracy and high-frequency detail. However, the
Authors
Barry J. Kronenfeld, Larry V. Stanislawski, Tyler Brockmeyer, Barbara P. Buttenfield
By
Core Science Systems Mission Area, Center of Excellence for Geospatial Information Science (CEGIS), National Geospatial Technical Operations Center

State transportation agencies partner to deploy and enhance ShakeCast State transportation agencies partner to deploy and enhance ShakeCast

The California Department of Transportation (Caltrans) is organizing and leading a three-year Transportation Pooled Fund (TPF) project, Connecting the Dots: Implementing ShakeCast Across Multiple State Departments of Transportation for Rapid Post-Earthquake Response. Ten state Departments of Transportation (DOT)—CA, ID, MO, MS, OK, OR, SC, TX, UT, AND WA—have partnered and combined...
Authors
L. Turner, David J. Wald, Kuo-wan Lin, Brian Chiou, Daniel Slosky
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

New methods for predicting and measuring dispersion in rivers New methods for predicting and measuring dispersion in rivers

To develop a better predictive tool for dispersion in rivers over a range of temporal and spatial scales, our group has developed a simple Lagrangian model that is applicable for a wide range of coordinate systems and flow modeling methodologies. The approach allows dispersion computations for a large suite of discretizations, model dimensions (1-, 2-, or 3-dimensional), spatial and...
Authors
Jonathan M. Nelson, Richard R. McDonald, Carl J. Legleiter, Paul J. Kinzel, Travis Terrell Ramos, Yutaka Higashi, Il Won Seo, Donghae Baek, Du Han Lee, Yonguk Ryu

Similarity assessment of linear hydrographic features using high performance computing Similarity assessment of linear hydrographic features using high performance computing

This work discusses a current open source implementation of a line similarity assessment workflow to compare elevation-derived drainage lines with the high-resolution National Hydrography Dataset (NHD) surface-water flow network. The process identifies matching and mismatching lines in each dataset to help focus subsequent validation procedures to areas of the NHD that more critically...
Authors
Larry V. Stanislawski, Jeffrey Wendel, Ethan J. Shavers, Ting Li
By
Core Science Systems Mission Area, Center of Excellence for Geospatial Information Science (CEGIS), National Geospatial Technical Operations Center

Thermally induced fracture of macroscale surficial granite sheets Thermally induced fracture of macroscale surficial granite sheets

Geologically diverse landforms around the world show indications of energetic macroscale fracture. These fractures are sometimes displayed dramatically as so-called “A-tents”, whereby relatively thin rock sheets push upwards and fracture, forming tent-like voids beneath the ruptured sheets. The origin and formation of such features has been a topic of considerable interest and analysis...
Authors
Brian D. Collins, Greg M. Stock, Martha C. Eppes
By
Energy Resources Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Geology, Minerals, Energy, and Geophysics Science Center

Interstate water management of a “hidden” resource - Physical principles of groundwater hydrology Interstate water management of a “hidden” resource - Physical principles of groundwater hydrology

Groundwater systems are dynamic geologic environments in which water continuously flows from recharge areas to discharge areas at streams, springs, wetlands, coastal waters, and wells. Natural, predevelopment conditions within groundwater systems are changed by the introduction of wells and other human stresses that modify existing groundwater levels, flow paths, and hydrologic budgets
Authors
Paul M. Barlow
By
Water Resources Mission Area, Groundwater and Streamflow Information Program
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