USGS US Topo 7.5-minute map for Block, TN 2010

Resource lineage description

source

source description  Source Contribution: Image Source Type digital data

representative resolution scale:

Scale denominator: 24000

source citation

Title Orthoimagery

publication  Date  

presentationForm  RASTER DIGITAL DATA OR DIGITAL ORTHORECTIFIED IMAGE OR NAIP DIGITAL ORTHO PHOTO IMAGE

other Citation Details  An orthorectified image is a layer in every product and is provided by the USDA-FSA-APFO from the National Agriculture Image Program (NAIP). This offers the USGS a nationally consistent image product, normally with a one meter resolution in natural color, and provides the primary content for the image-based 7.5-minute quadrangle map.

cited responsible party - originator

organisation Name  National Agriculture Image Program (NAIP) administered by the Aerial Photography Field Office (APFO) for the United States Department of Agriculture.

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organisation Name  

Contact information

Linkage for online resource

URL: http://www.fsa.usda.gov

source

source description  Source Contribution: Road centerlines, route numbers, road classification, street names Source Type digital data

representative resolution scale:

Scale denominator: 24000

source citation

Title Transportation

publication  Date  

presentationForm  mapDigital

other Citation Details  The National Map Transportation Dataset is a feature-based design that classifies and uniquely identifies geospatial data for the transportation data theme. The data is organized into a seamless, integrated and consistent dataset of national extent. The initial data is derived from the U.S. Census Bureau's accuracy improvements to the TIGER/Line shapefile dataset. The data is supplemented with limited updates to improve the classification, accuracy, and currency of the major features.

cited responsible party - originator

organisation Name  U.S. Census Bureau

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organisation Name  

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Linkage for online resource

URL: http://viewer.nationalmap.gov/

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source description  Source Contribution: Geographic feature names Source Type digital data

representative resolution scale:

Scale denominator: 24000

source citation

Title Geographic Names Information System (GNIS)

publication  Date  

presentationForm  mapDigital

other Citation Details  The National Geographic Names Database is a part of the Geographic Names Information System (GNIS) and represents the primary source for identifying official names. The system is maintained by the U.S. Geological Survey in cooperation with the U.S. Board of Geographic Names.

cited responsible party - originator

organisation Name  U.S. Geological Survey

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organisation Name  

Contact information

Linkage for online resource

URL: http://geonames.usgs.gov

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source description  Source Contribution: Hydrography features and feature names Source Type digital data

representative resolution scale:

Scale denominator: 24000

source citation

Title Hydrography

publication  Date  

presentationForm  mapDigital

other Citation Details  The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. The high-resolution NHD was originally created using 1:24,000-scale data. State and Local Stewards are improving the data by incorporating local updates based on more current and more accurate source data. Water features in the real world are relatively dynamic and the differences at the time of data collection mean that water features may not register exactly to other layers. The hydrographic feature names contained in and displayed by the NHD are extracted and validated from the Geographic Names Information System (GNIS).

cited responsible party - originator

organisation Name  U.S. Geological Survey in cooperation with U.S. Environmental Protection Agency, USDA Forest Service, and other Federal, State and local partners. National Hydrography Dataset is a component of a comprehensive base geospatial data model.

cited responsible party -

organisation Name  

Contact information

Linkage for online resource

URL: http://nhd.usgs.gov

cited responsible party -

organisation Name  

Contact information

Linkage for online resource

URL: http://nhd.usgs.gov/gnis.html

cited responsible party -

organisation Name  

Contact information

Linkage for online resource

URL: http://nhdgeo.usgs.gov/metadata/nhd_high.htm

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source description  Source Contribution: International Boundary between Mexico, Canada and the United StatesSource Type vector digital data

source citation

Title Boundaries

publication  Date  

other Citation Details  The international boundary between Mexico and the United States was defined as a joint venture between the US Department of Agriculture (USDA) and the Instituto Nacional de Estad stica y Geograf a of Mexico (INEGI) resulted in an unofficial United States-Mexico boundary dataset that was further enhanced by the U.S. Geological Survey's Border Environmental Health Initiative (BEHI). With the data frame scale set to 1:5,000 in ArcMap, the center of the Rio Grande/R o Bravo was digitized using the NAIP 2004 Imagery. In areas with dense stands of salt cedar (bounding box = UL -104.714 30.038, UR -104.664 30.037, LR -104.666 29.933, LL -104.717 29.934; NAD83), the center of the channel was difficult, and sometimes impossible, to easily determine. To determine the location of the boundary, the GIS analyst compared the location of the line in the INEGI 1:250K Limite feature class with the NAIP 2004 Imagery and adjusted the boundary to the image, thus, the delineation of the international boundary is less certain in these areas. The remaining part of the border was extracted from the INEGI 1:250K Limite feature class and appended to the line feature class created along the Rio Grande/R o Bravo. The US Geological Survey reviewed the original USDA data against 2007 NAIP imagery and further edited 9 line segments in the Rio Grande areas to conform to National Map Accuracy Standards. The international boundary dataset between Canada and the United States was provided by Maine Office of Geographic Information Systems (MEGIS), University of New Hampshire, Vermont Center for Geographic Information, Inc (VCGI). The dataset was collected from multiple source agencies such as the US Geology Survey, U.S. Department of Commerce, Bureau of Census, Bureau of Parks and Lands, Coastal Island Registry (CIREG) and various state agencies. The data and attribution accuracy was tested by manual comparison of the source with hard copy printouts and/or symbolized display of digital files and corrected by each state GIS department for use at a scale not greater than 1:24,000.

cited responsible party - originator

organisation Name  U.S. Geological Survey, US Department of Agriculture and the Instituto Nacional de Estad stica y Geograf a of Mexico for the Mexico International Boundary and Maine Office of Geographic Information Systems (MEGIS), University of New Hampshire, Vermont Center for Geographic Information, Inc (VCGI) for the Canada International Boundary

cited responsible party -

organisation Name  

Contact information

Linkage for online resource

URL: http://megis.maine.gov/catalog

cited responsible party -

organisation Name  

Contact information

Linkage for online resource

URL: http://www.granit.sr.unh.edu

source

source description  Source Contribution: Contours Source Type digital data

representative resolution scale:

Scale denominator: 24000

source citation

Title Hypsography

publication  Date  

presentationForm  mapDigital

other Citation Details  This contour feature class was generated from the 1/3 arc-second version of the National Elevation Dataset (NED). The intended viewing scale for these features is 1:24,000. The contours are derived from a filtered elevation raster to achieve smoother arcs. The NED data were modified by the National Hydrography Dataset (NHD) flow lines and water bodies to facilitate improved integration between the hypsography and hydrography on USGS map products. These contours were generated primarily for use as a layer in GeoPDFs created in the USTopo digital mapping program. The raster data source of contours is the National Elevation Dataset (NED) 1/3 arc-second layer. The 1/3 arc-second NED contains resampled data from the 1/9 arc-second layer of NED. Secondary datasets include the high resolution flow lines, water bodies, and areas from the National Hydrography Dataset (NHD). The NHD layers are used in hydro-enforcement of the DEM prior to contour generation. The goals of the hydro-enforcement are to prevent contour lines from extending over the surface of water bodies and to align the contour reentrants with the NHD single-line streams. The NED raster cells are converted to points. Those points, along with the NHD flow lines are input into an interpolation tool to create a new surface. The NHD water bodies and areas are preprocessed to attach the minimum and maximum elevation to each polygon. From these precalculated values, an appropriate value is calculated by which to raise the elevation cells under the NHD polygons. The NHD polygons are then converted into rasters, which in turn will be used to generate a mosaic that includes the new raster surface. The mosaic is filtered to provide smoother contour lines. Contours are generated and depression and index contours are identified. There is no guarantee or warranty concerning the accuracy of the data. Users should be aware that temporal changes may have occurred since these data were collected and generated and that some parts of these data may no longer represent actual surface conditions. Hydro-enforcement and generalization can also significantly alter the spatial characteristics of the contours. Users should not use these data for critical applications without a full awareness of its limitations.

cited responsible party - originator

organisation Name  USGS - National Elevation Dataset is a component of a comprehensive base geospatial data model.

cited responsible party -

organisation Name  

Contact information

Linkage for online resource

URL: http://ned.usgs.gov/

source

source description  Source Contribution: 2.5-minute geographic ticks, U.S. National Grid, UTM grid, State Plane Coordinate System ticks. Source Type raster data

source citation

Title Grids and Coordinate System

publication  Date  

other Citation Details  U.S. National Grid, UTM grid, and State Plane Coordinate System values are displayed along the map projection.

cited responsible party - originator

organisation Name  U.S. Geological Survey

AbsoluteExternalPositionalAccuracy

name Of Measure Horizontal Positional Accuracy Report

evaluation Method Description  This US Topo map product is compiled to meet National Map Accuracy Standards (NMAS). NMAS horizontal accuracy requires that at least 90 percent of well-defined points tested are within 0.02 inch of the true position. In this product, the projection line, grids, and orthoimage are believed to meet NMAS. Positional accuracy of the other data layers is less controllable because of diversity of data sources, and may not meet NMAS.

Completeness Commission

evaluation Method Description  Each layer of the GeoPDF is extracted from the USGS national geospatial databases. These data are intended to be cartographically complete at a 1:24,000 scale.

Completeness Omission

evaluation Method Description  Each layer of the GeoPDF is extracted from the USGS national geospatial databases. These data are intended to be cartographically complete at a 1:24,000 scale.

ConceptualConsistency

measure Description  This product is a layered GeoPDF file. GeoPDF is a copyright format with implementation rights held exclusively by TerraGo Technologies. This design is based on use of specific commercial software systems therefore any changes to the software specifications and dependencies will be followed by the USGS and codified in the product standard.