E. Lynn Usery (Former Employee)
Science and Products
Filter Total Items: 59
GNIS-LD: Serving and visualizing the Geographic Names Information System Gazetteer as linked data
In this dataset description paper we introduce the GNIS-LD, an authoritative and public domain Linked Dataset derived from the Geographic Names Information System (GNIS) which was developed by the U.S. Geological Survey (USGS) and the U.S. Board on Geographic Names. GNIS provides data about current, as well as historical, physical, and cultural geographic features in the United States. We describe
Authors
Blake Regalia, Krzysztof Janowicz, Gengchen Mai, Dalia E. Varanka, E. Lynn Usery
The map as knowledge base
This paper examines the concept and implementation of a map as a knowledge base. A map as a knowledge base means that the visual map is not only the descriptive compilation of data and design principles, but also involves a compilation of semantic propositions and logical predicates that create a body of knowledge organized as a map. The digital product of a map as knowledge base can be interprete
Authors
Dalia E. Varanka, E. Lynn Usery
Understanding map projections
It has probably never been more important in the history of cartography than now that people understand how maps work. With increasing globalization, for example, world maps provide a key format for the transmission of information, but are often poorly used. Examples of poor understanding and use of projections and the resultant maps are many; for instance, the use of rectangular world maps in the
Authors
E. Lynn Usery
A reference landform ontology for automated delineation of depression landforms from DEMs
Abstract The landform reference ontology (LFRO) is being developed to formalize ontological distinctions underlying naïve geographic cognition and reasoning about landforms. The LFRO taxonomy is currently based only on form-based distinctions. In this significantly revised version, several new categories have been added to explicate ontological distinctions related to material-spatial dependence
Authors
Gaurav Sinha, Samantha Arundel, Torsten Hahmann, E. Lynn Usery, Kathleen C. Stewart, David Mark
The logic of selecting an appropriate map projection in a Decision Support System (DSS)
There are undeniable practical consequences to consider when choosing an appropriate map projection for a specific region. The surface of a globe covered by global, continental, and regional maps are so singular that each type distinctively affects the amount of distortion incurred during a projection transformation because of the an assortment of effects caused by distance, direction, scale , and
Authors
Michael P. Finn, E. Lynn Usery, Laura N. Woodard, Kristina H. Yamamoto
A multidimensional representation model of geographic features
A multidimensional model of geographic features has been developed and implemented with data from The National Map of the U.S. Geological Survey. The model, programmed in C++ and implemented as a feature library, was tested with data from the National Hydrography Dataset demonstrating the capability to handle changes in feature attributes, such as increases in chlorine concentration in a stream, a
Authors
E. Lynn Usery, George Timson, Mark Coletti
Adapting the U.S. National Hydrography Dataset to linked open data
A controlled vocabulary for the National Hydrography Dataset (NHD) of the United States was developed as Linked Open Data (LOD). The vocabulary has two main parts: a glossary and a set of triples reflecting the NHD data model as it is organized in geographic information systems (GIS). The glossary consists of a feature type label and a comment consisting of a definition that is linked to a hydrogr
Authors
Dalia E. Varanka, E. Lynn Usery, David M. Mattli
What is in a contour map? A region-based logical formalization of contour semantics
Contours maps (such as topographic maps) compress the information of a function over a two-dimensional area into a discrete set of closed lines that connect points of equal value (isolines), striking a fine balance between expressiveness and cognitive simplicity. They allow humans to perform many common sense reasoning tasks about the underlying function (e.g. elevation).
This paper analyses and f
Authors
E. Lynn Usery, Torsten Hahmann
Map projections and reference systems
No abstract available.
Authors
Miljenko Lapaine, E. Lynn Usery
An ontology design pattern for surface water features
Surface water is a primary concept of human experience but concepts are captured in cultures and languages in many different ways. Still, many commonalities exist due to the physical basis of many of the properties and categories. An abstract ontology of surface water features based only on those physical properties of landscape features has the best potential for serving as a foundational domain
Authors
Gaurav Sinha, David Mark, Dave Kolas, Dalia Varanka, Boleslo E. Romero, Chen-Chieh Feng, E. Lynn Usery, Joshua Liebermann, Alexandre Sorokine
Implications of Web Mercator and its Use in Online Mapping
Online interactive maps have become a popular means of communicating with spatial data. In most online mapping systems, Web Mercator has become the dominant projection. While the Mercator projection has a long history of discussion about its inappropriateness for general-purpose mapping, particularly at the global scale, and seems to have been virtually phased out for general-purpose global-scale
Authors
Sarah E. Battersby, Michael P. Finn, E. Lynn Usery, Kristina H. Yamamoto
An applied ontology for semantics associated with surface water land cover
No abstract available.
Authors
Dalia E. Varanka, E. Lynn Usery
Science and Products
Filter Total Items: 59
GNIS-LD: Serving and visualizing the Geographic Names Information System Gazetteer as linked data
In this dataset description paper we introduce the GNIS-LD, an authoritative and public domain Linked Dataset derived from the Geographic Names Information System (GNIS) which was developed by the U.S. Geological Survey (USGS) and the U.S. Board on Geographic Names. GNIS provides data about current, as well as historical, physical, and cultural geographic features in the United States. We describe
Authors
Blake Regalia, Krzysztof Janowicz, Gengchen Mai, Dalia E. Varanka, E. Lynn Usery
The map as knowledge base
This paper examines the concept and implementation of a map as a knowledge base. A map as a knowledge base means that the visual map is not only the descriptive compilation of data and design principles, but also involves a compilation of semantic propositions and logical predicates that create a body of knowledge organized as a map. The digital product of a map as knowledge base can be interprete
Authors
Dalia E. Varanka, E. Lynn Usery
Understanding map projections
It has probably never been more important in the history of cartography than now that people understand how maps work. With increasing globalization, for example, world maps provide a key format for the transmission of information, but are often poorly used. Examples of poor understanding and use of projections and the resultant maps are many; for instance, the use of rectangular world maps in the
Authors
E. Lynn Usery
A reference landform ontology for automated delineation of depression landforms from DEMs
Abstract The landform reference ontology (LFRO) is being developed to formalize ontological distinctions underlying naïve geographic cognition and reasoning about landforms. The LFRO taxonomy is currently based only on form-based distinctions. In this significantly revised version, several new categories have been added to explicate ontological distinctions related to material-spatial dependence
Authors
Gaurav Sinha, Samantha Arundel, Torsten Hahmann, E. Lynn Usery, Kathleen C. Stewart, David Mark
The logic of selecting an appropriate map projection in a Decision Support System (DSS)
There are undeniable practical consequences to consider when choosing an appropriate map projection for a specific region. The surface of a globe covered by global, continental, and regional maps are so singular that each type distinctively affects the amount of distortion incurred during a projection transformation because of the an assortment of effects caused by distance, direction, scale , and
Authors
Michael P. Finn, E. Lynn Usery, Laura N. Woodard, Kristina H. Yamamoto
A multidimensional representation model of geographic features
A multidimensional model of geographic features has been developed and implemented with data from The National Map of the U.S. Geological Survey. The model, programmed in C++ and implemented as a feature library, was tested with data from the National Hydrography Dataset demonstrating the capability to handle changes in feature attributes, such as increases in chlorine concentration in a stream, a
Authors
E. Lynn Usery, George Timson, Mark Coletti
Adapting the U.S. National Hydrography Dataset to linked open data
A controlled vocabulary for the National Hydrography Dataset (NHD) of the United States was developed as Linked Open Data (LOD). The vocabulary has two main parts: a glossary and a set of triples reflecting the NHD data model as it is organized in geographic information systems (GIS). The glossary consists of a feature type label and a comment consisting of a definition that is linked to a hydrogr
Authors
Dalia E. Varanka, E. Lynn Usery, David M. Mattli
What is in a contour map? A region-based logical formalization of contour semantics
Contours maps (such as topographic maps) compress the information of a function over a two-dimensional area into a discrete set of closed lines that connect points of equal value (isolines), striking a fine balance between expressiveness and cognitive simplicity. They allow humans to perform many common sense reasoning tasks about the underlying function (e.g. elevation).
This paper analyses and f
Authors
E. Lynn Usery, Torsten Hahmann
Map projections and reference systems
No abstract available.
Authors
Miljenko Lapaine, E. Lynn Usery
An ontology design pattern for surface water features
Surface water is a primary concept of human experience but concepts are captured in cultures and languages in many different ways. Still, many commonalities exist due to the physical basis of many of the properties and categories. An abstract ontology of surface water features based only on those physical properties of landscape features has the best potential for serving as a foundational domain
Authors
Gaurav Sinha, David Mark, Dave Kolas, Dalia Varanka, Boleslo E. Romero, Chen-Chieh Feng, E. Lynn Usery, Joshua Liebermann, Alexandre Sorokine
Implications of Web Mercator and its Use in Online Mapping
Online interactive maps have become a popular means of communicating with spatial data. In most online mapping systems, Web Mercator has become the dominant projection. While the Mercator projection has a long history of discussion about its inappropriateness for general-purpose mapping, particularly at the global scale, and seems to have been virtually phased out for general-purpose global-scale
Authors
Sarah E. Battersby, Michael P. Finn, E. Lynn Usery, Kristina H. Yamamoto
An applied ontology for semantics associated with surface water land cover
No abstract available.
Authors
Dalia E. Varanka, E. Lynn Usery