Dalia E Varanka, PhD
Dr. Varanka, Research Physical Scientist, leads the Geospatial Semantics and Ontology project of the Center of Excellence for Geospatial Information Science.
Dr. Varanka was a research assistant at The Field Museum of Natural History and later at The Newberry Library in Chicago. She started her Federal career at the U.S. Bureau of Land Management in 1993 and has been a Research Grade Evaluation (RGE) scientist since 1998 with the USGS National Geospatial Program. Dr. Varanka taught Geospatial Ontology and Semantics at Johns Hopkins University and is Chair of the Commission on Geospatial Semantics of the International Cartographic Association.
Science and Products
Filter Total Items: 39
An analysis of spatial relation predicates in U.S. Geological Survey feature definitions
The Semantic Web uses a data model called a triple, which consists of a subject -predicate - object structure. When represented as triples, geospatial data require a spatial relation term to serve as the predicate linking two spatial features. This document summarizes the approaches and procedures used during the identification of spatial relationships common between topographic features using ter
Authors
Holly K. Caro, Dalia E. Varanka
A program for the conversion of The National Map data from proprietary format to resource description framework (RDF)
To expand data functionality and capabilities for users of The National Map of the U.S. Geological Survey, data sets for six watersheds and three urban areas were converted from the Best Practices vector data model formats to Semantic Web data formats. This report describes and documents the conver-sion process. The report begins with an introduction to basic Semantic Web standards and the backgro
Authors
Andrew Bulen, Jonathan J. Carter, Dalia E. Varanka
Ontology patterns for complex topographic feature types
Complex feature types are defined as integrated relations between basic features for a shared meaning or concept. The shared semantic concept is difficult to define in commonly used geographic information systems (GIS) and remote sensing technologies. The role of spatial relations between complex feature parts was recognized in early GIS literature, but had limited representation in the feature or
Authors
Dalia E. Varanka
Ontological Issues for national topographic mapping
No abstract available.
Authors
Dalia E. Varanka, E. Lynn Usery
A topographic feature taxonomy for a U.S. national topographic mapping ontology
Using legacy feature lists from the U.S. National Topographic Mapping Program of the
twentieth century, a taxonomy of features is presented for purposes of developing a
national topographic feature ontology for geographic mapping and analysis. After
reviewing published taxonomic classifications, six basic classes are suggested; terrain,
surface water, ecological regimes, built-up areas, divisi
Authors
Dalia E. Varanka
Land-Use Change Trends in the Interior Lowland Ecoregion
This report describes land-cover trends in the Interior River Lowland ecoregion, located primarily in southern Illinois and includes the confluence areas of the Mississippi, Missouri, Ohio, Illinois, and Wabash Rivers, and their tributaries. Land-cover change statistics were tabulated from forty 10 kilometers (km) by 10-km multi-spectral remote-sensing sample areas collected from 1973 to 2000 and
Authors
Dalia E. Varanka, David K. Shaver
Ontological foundations of transportation data for the National Map (USA)
No abstract available.
Authors
Dalia E. Varanka
Centralization and locality in the 20th century National Topographic Mapping Program In the United States
No abstract available.
Authors
Dalia E. Varanka
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
Analytical concepts in early computer cartography and late national topographic mapping in the United States
No abstract available.
Authors
Dalia E. Varanka
Science and Products
Filter Total Items: 39
An analysis of spatial relation predicates in U.S. Geological Survey feature definitions
The Semantic Web uses a data model called a triple, which consists of a subject -predicate - object structure. When represented as triples, geospatial data require a spatial relation term to serve as the predicate linking two spatial features. This document summarizes the approaches and procedures used during the identification of spatial relationships common between topographic features using ter
Authors
Holly K. Caro, Dalia E. Varanka
A program for the conversion of The National Map data from proprietary format to resource description framework (RDF)
To expand data functionality and capabilities for users of The National Map of the U.S. Geological Survey, data sets for six watersheds and three urban areas were converted from the Best Practices vector data model formats to Semantic Web data formats. This report describes and documents the conver-sion process. The report begins with an introduction to basic Semantic Web standards and the backgro
Authors
Andrew Bulen, Jonathan J. Carter, Dalia E. Varanka
Ontology patterns for complex topographic feature types
Complex feature types are defined as integrated relations between basic features for a shared meaning or concept. The shared semantic concept is difficult to define in commonly used geographic information systems (GIS) and remote sensing technologies. The role of spatial relations between complex feature parts was recognized in early GIS literature, but had limited representation in the feature or
Authors
Dalia E. Varanka
Ontological Issues for national topographic mapping
No abstract available.
Authors
Dalia E. Varanka, E. Lynn Usery
A topographic feature taxonomy for a U.S. national topographic mapping ontology
Using legacy feature lists from the U.S. National Topographic Mapping Program of the
twentieth century, a taxonomy of features is presented for purposes of developing a
national topographic feature ontology for geographic mapping and analysis. After
reviewing published taxonomic classifications, six basic classes are suggested; terrain,
surface water, ecological regimes, built-up areas, divisi
Authors
Dalia E. Varanka
Land-Use Change Trends in the Interior Lowland Ecoregion
This report describes land-cover trends in the Interior River Lowland ecoregion, located primarily in southern Illinois and includes the confluence areas of the Mississippi, Missouri, Ohio, Illinois, and Wabash Rivers, and their tributaries. Land-cover change statistics were tabulated from forty 10 kilometers (km) by 10-km multi-spectral remote-sensing sample areas collected from 1973 to 2000 and
Authors
Dalia E. Varanka, David K. Shaver
Ontological foundations of transportation data for the National Map (USA)
No abstract available.
Authors
Dalia E. Varanka
Centralization and locality in the 20th century National Topographic Mapping Program In the United States
No abstract available.
Authors
Dalia E. Varanka
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
Analytical concepts in early computer cartography and late national topographic mapping in the United States
No abstract available.
Authors
Dalia E. Varanka