E. Lynn Usery (Former Employee)
Science and Products
Filter Total Items: 59
Using geometrical, textural, and contextual information of land parcels for classification of detailed urban land use
Detailed urban land use data are important to government officials, researchers, and businesspeople for a variety of purposes. This article presents an approach to classifying detailed urban land use based on geometrical, textural, and contextual information of land parcels. An area of 6 by 14 km in Austin, Texas, with land parcel boundaries delineated by the Travis Central Appraisal District of T
Authors
S.-S. Wu, X. Qiu, E.L. Usery, L. Wang
A 125 year history of topographic mapping and GIS in the U.S. Geological Survey 1884-2009, part 2: 1980-2009
The United States Geological Survey (USGS) entered the mainstream of developments in computer-assisted technology for mapping during the 1970s. The introduction by USGS of digital line graphs (DLGs), digital elevation models (DEMs), and land use data analysis (LUDA) nationwide land-cover data provided a base for the rapid expansion of the use of GIS in the 1980s. Whereas USGS had developed the top
Authors
E. Lynn Usery, Dalia Varanka, Michael P. Finn
A 125 year history of topographic mapping and GIS in the U.S. Geological Survey 1884-2009, part 1: 1884-1980
On December 4–5, 1884, John Wesley Powell persuaded the U.S. Congress to authorize the U.S. Geological Survey (USGS) to begin systematic topographic mapping of the United States.
Authors
E. Lynn Usery, Dalia Varanka, Michael P. Finn
An assessment of the effects of cell size on AGNPS modeling of watershed runoff
This study investigates the changes in simulated watershed runoff from the Agricultural NonPoint Source (AGNPS) pollution model as a function of model input cell size resolution for eight different cell sizes (30 m, 60 m, 120 m, 210 m, 240 m, 480 m, 960 m, and 1920 m) for the Little River Watershed (Georgia, USA). Overland cell runoff (area-weighted cell runoff), total runoff volume, clustering st
Authors
S.-S. Wu, E.L. Usery, M.P. Finn, D.D. Bosch
EL68D Wasteway Watershed Land-Cover Generation
Classification of land cover from Landsat Enhanced Thematic Mapper Plus (ETM+) for the EL68D Wasteway Watershed in the State of Washington is documented. The procedures for classification include use of two ETM+ scenes in a simultaneous unsupervised classification process supported by extensive field data collection using Global Positioning System receivers and digital photos. The procedure result
Authors
Sheila Ruhl, E. Lynn Usery, Michael P. Finn
An interface between the Agricultural Non-Point Source (AGNPS) pollution model and the ERDAS Imagine Geographic Information System (GIS)
The U.S. Department of Agriculture developed the Agricultural Non-Point Source (AGNPS) pollution model. The AGNPS pollution model simulates the behavior of runoff, sediment, and nutrient transport from watersheds that have agriculture as their prime use. This model has been used extensively by scientists conducting hydrologic or water quality analyses using computer modeling in an attempt to furth
Authors
Michael P. Finn, E. Lynn Usery, Douglas J. Scheidt, Gregory M. Jaromack, Timothy D. Krupinski
Automatic alignment of vector data and orthoimagery for the national map
A general problem in combining road vector data with orthoimagery from different sources is that they rarely align. There are a variety of causes to this problem, but the most common one is that the latest products are collected with higher accuracy and improved processing techniques. In previous work, we developed techniques to automatically correct the alignment of vector data with orthoimagery
Authors
C.A. Knoblock, C. Shahabi, C.-C. Chen, E.L. Usery
Geography for a Changing World - A science strategy for the geographic research of the U.S. Geological Survey, 2005-2015
This report presents a science strategy for the geographic research of the U.S. Geological Survey (USGS) for the years 2005-2015. The common thread running through the vision, mission, and science goals presented in the plan is that USGS geographers will provide national leadership to understand coupled human-environmental systems in the face of land change and will deliver pertinent information t
Authors
Gerard McMahon, Susan P. Benjamin, Keith Clarke, John E. Findley, Robert N. Fisher, William L. Graf, Linda C. Gundersen, John Jones, Thomas R. Loveland, Keven S. Roth, E. Lynn Usery, Nathan J. Wood
Postscript on the UCGIS and research
No abstract available.
Authors
D. M. Mark, E. Lynn Usery, Robert B. McMaster
A research agenda for geographic information science
No abstract available.
Authors
Robert B. McMaster, E. Lynn Usery
Introduction to the UCGIS research agenda
No abstract available.
Authors
E. Lynn Usery, Robert B. McMaster
Spatial data acquisition and integration
No abstract available.
Authors
J. Jensen, A. Saalfeld, F. Broome, D. Cowen, K. Price, D. Ramsey, L. Lapine, E. Lynn Usery
Science and Products
Filter Total Items: 59
Using geometrical, textural, and contextual information of land parcels for classification of detailed urban land use
Detailed urban land use data are important to government officials, researchers, and businesspeople for a variety of purposes. This article presents an approach to classifying detailed urban land use based on geometrical, textural, and contextual information of land parcels. An area of 6 by 14 km in Austin, Texas, with land parcel boundaries delineated by the Travis Central Appraisal District of T
Authors
S.-S. Wu, X. Qiu, E.L. Usery, L. Wang
A 125 year history of topographic mapping and GIS in the U.S. Geological Survey 1884-2009, part 2: 1980-2009
The United States Geological Survey (USGS) entered the mainstream of developments in computer-assisted technology for mapping during the 1970s. The introduction by USGS of digital line graphs (DLGs), digital elevation models (DEMs), and land use data analysis (LUDA) nationwide land-cover data provided a base for the rapid expansion of the use of GIS in the 1980s. Whereas USGS had developed the top
Authors
E. Lynn Usery, Dalia Varanka, Michael P. Finn
A 125 year history of topographic mapping and GIS in the U.S. Geological Survey 1884-2009, part 1: 1884-1980
On December 4–5, 1884, John Wesley Powell persuaded the U.S. Congress to authorize the U.S. Geological Survey (USGS) to begin systematic topographic mapping of the United States.
Authors
E. Lynn Usery, Dalia Varanka, Michael P. Finn
An assessment of the effects of cell size on AGNPS modeling of watershed runoff
This study investigates the changes in simulated watershed runoff from the Agricultural NonPoint Source (AGNPS) pollution model as a function of model input cell size resolution for eight different cell sizes (30 m, 60 m, 120 m, 210 m, 240 m, 480 m, 960 m, and 1920 m) for the Little River Watershed (Georgia, USA). Overland cell runoff (area-weighted cell runoff), total runoff volume, clustering st
Authors
S.-S. Wu, E.L. Usery, M.P. Finn, D.D. Bosch
EL68D Wasteway Watershed Land-Cover Generation
Classification of land cover from Landsat Enhanced Thematic Mapper Plus (ETM+) for the EL68D Wasteway Watershed in the State of Washington is documented. The procedures for classification include use of two ETM+ scenes in a simultaneous unsupervised classification process supported by extensive field data collection using Global Positioning System receivers and digital photos. The procedure result
Authors
Sheila Ruhl, E. Lynn Usery, Michael P. Finn
An interface between the Agricultural Non-Point Source (AGNPS) pollution model and the ERDAS Imagine Geographic Information System (GIS)
The U.S. Department of Agriculture developed the Agricultural Non-Point Source (AGNPS) pollution model. The AGNPS pollution model simulates the behavior of runoff, sediment, and nutrient transport from watersheds that have agriculture as their prime use. This model has been used extensively by scientists conducting hydrologic or water quality analyses using computer modeling in an attempt to furth
Authors
Michael P. Finn, E. Lynn Usery, Douglas J. Scheidt, Gregory M. Jaromack, Timothy D. Krupinski
Automatic alignment of vector data and orthoimagery for the national map
A general problem in combining road vector data with orthoimagery from different sources is that they rarely align. There are a variety of causes to this problem, but the most common one is that the latest products are collected with higher accuracy and improved processing techniques. In previous work, we developed techniques to automatically correct the alignment of vector data with orthoimagery
Authors
C.A. Knoblock, C. Shahabi, C.-C. Chen, E.L. Usery
Geography for a Changing World - A science strategy for the geographic research of the U.S. Geological Survey, 2005-2015
This report presents a science strategy for the geographic research of the U.S. Geological Survey (USGS) for the years 2005-2015. The common thread running through the vision, mission, and science goals presented in the plan is that USGS geographers will provide national leadership to understand coupled human-environmental systems in the face of land change and will deliver pertinent information t
Authors
Gerard McMahon, Susan P. Benjamin, Keith Clarke, John E. Findley, Robert N. Fisher, William L. Graf, Linda C. Gundersen, John Jones, Thomas R. Loveland, Keven S. Roth, E. Lynn Usery, Nathan J. Wood
Postscript on the UCGIS and research
No abstract available.
Authors
D. M. Mark, E. Lynn Usery, Robert B. McMaster
A research agenda for geographic information science
No abstract available.
Authors
Robert B. McMaster, E. Lynn Usery
Introduction to the UCGIS research agenda
No abstract available.
Authors
E. Lynn Usery, Robert B. McMaster
Spatial data acquisition and integration
No abstract available.
Authors
J. Jensen, A. Saalfeld, F. Broome, D. Cowen, K. Price, D. Ramsey, L. Lapine, E. Lynn Usery