E. Lynn Usery (Former Employee)
Science and Products
Filter Total Items: 60
Adapting the U.S. National Hydrography Dataset to linked open data 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...
Authors
Dalia E. Varanka, E. Lynn Usery, David M. Mattli
What is in a contour map? A region-based logical formalization of contour semantics 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...
Authors
E. Lynn Usery, Torsten Hahmann
Map projections and reference systems Map projections and reference systems
No abstract available.
Authors
Miljenko Lapaine, E. Lynn Usery
An ontology design pattern for surface water features 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...
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 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...
Authors
Sarah E. Battersby, Michael P. Finn, E. Lynn Usery, Kristina H. Yamamoto
An applied ontology for semantics associated with surface water land cover 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: 60
Adapting the U.S. National Hydrography Dataset to linked open data 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...
Authors
Dalia E. Varanka, E. Lynn Usery, David M. Mattli
What is in a contour map? A region-based logical formalization of contour semantics 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...
Authors
E. Lynn Usery, Torsten Hahmann
Map projections and reference systems Map projections and reference systems
No abstract available.
Authors
Miljenko Lapaine, E. Lynn Usery
An ontology design pattern for surface water features 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...
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 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...
Authors
Sarah E. Battersby, Michael P. Finn, E. Lynn Usery, Kristina H. Yamamoto
An applied ontology for semantics associated with surface water land cover An applied ontology for semantics associated with surface water land cover
No abstract available.
Authors
Dalia E. Varanka, E. Lynn Usery