USGS US Topo 7.5-minute map for Zion, IL,WI 2018

Data Quality Information

Attribute Accuracy Report

Cartographic content is derived from USGS national geospatial databases. Most the data are owned and hosted by the USGS, but this does not preclude using data sources owned or hosted by other organizations, provided that these sources have been approved by the USGS data program.

Logical Consistency Report

This product is a layered geospatial PDF file.

Completeness Report

Each PDF layer is derived from data extracted from USGS national geospatial databases. These data are intended to be cartographically complete at 1:24,000 scale.

Horizontal Positional Accuracy Report

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. However, other vector layers do generally register well with the orthoimage, which is evidence that the overall accuracy is close to meeting NMAS.

Lineage

Source

Originator

For the conterminous 48 states - National Agriculture Image Program (NAIP) administered by the Aerial Photography Field Office (APFO) for the United States Department of Agriculture.

Publication Date

Publication Date

Title

Orthoimagery - CONUS

Geospatial Data Presentation Form

Raster digital data or Digital Orthorectified Image or NAIP Digital Ortho Photo Image or Raster digital data or Digital Orthorectified 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) in the conterminous US. This offers the USGS a consistent image product for the conterminous 48 states, normally with a one meter resolution in natural color, though resolution varies by collection date, and higher-res source data may be downsampled to 1 or 1.5 meter resolution for US Topo maps. The NAIP image in this product is public domain with no reuse constraints.

Online Linkage

https://www.fsa.usda.gov/programs-and-services/aerial-photography/imagery-programs/naip-imagery/

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

20150822

Ending Date

20151109

Source Currentness Reference

publication date

Contribution

Image

Source

Originator

U.S. Census Bureau

Publication Date

Publication Date

Title

Transportation, roads

Geospatial Data Presentation Form

Vector digital data

Other Citation Details

US Census Bureau's MAF/TIGER dataset is the primary source of roads in the USGS National Transportation Dataset (NTD). USGS converts TIGER roads to USGS NTD schema, performs minimal QC/edit, and loads the data into the NTD for use in The National Map viewer and US Topo maps. USFS roads replace TIGER roads on US Topo maps over US Forest Service National Forests and National Grasslands. Due to different vintages of the data and different road requirements of the agencies, misjoins along USFS boundaries are possible. In 2016, USGS started integrating National Parks Service into the NTD. As other federal agencies road data becomes available, their data may be incorporated into US Topo maps as well. US Topo maps created in the period of 2010-2015 contain commercially licensed road data with copyright restrictions; see individual product credit notes and metadata files for information.

Online Linkage

https://www.census.gov/geo/maps-data/data/tiger.html

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

2013

Ending Date

2013

Source Currentness Reference

publication date

Contribution

Road centerlines, route numbers, road classification, street names

Source

Originator

Alaska Department of Transportation

Publication Date

2016

Title

Transportation - Roads

Geospatial Data Presentation Form

vector digital data

Other Citation Details

Roads gathered from various state and local sources, integrated by the Alaska Department of Transportation (ADOT) and provided to USGS for use in USGS map products. This specific road dataset is unpublished, but earlier versions are published on the ADOT web site.

Online Linkage

http://www.dot.state.ak.us/stwdplng/mapping/

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

2015

Ending Date

2016

Source Currentness Reference

publication date

Contribution

Road centerlines, route numbers, road classification, street names

Source

Originator

USFS

Publication Date

Publication Date

Title

Transportation, National Park Service roads

Geospatial Data Presentation Form

Vector digital data

Other Citation Details

In 2016, The National Parks Service (NPS) began contributing roads to the USGS National Transportation Database (NTD) for use in The National Map and US Topo maps. The Intermountain Region and Alaska Region were the first covered areas. USGS converts NPS roads into NTD schema, performs minimal QC/edit, joins the edges between NPS and Census MAF/TIGER at the NPS boundary (AK DOT in Alaska), and loads the data into the NTD for use in The National Map viewer and US Topo maps. Due to different vintages of the data and different road requirements of the agencies, misjoins along NPS boundaries are possible.

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

2014

Ending Date

2017

Source Currentness Reference

publication date

Contribution

Road centerlines, route numbers, road classification, street names

Source

Originator

Various government agencies and volunteer organizations

Publication Date

Publication Date

Title

Recreational Trails

Geospatial Data Presentation Form

Vector digital data

Other Citation Details

The first recreational trails were added to US Topo maps in 2013. The data for trails come from a variety of sources. Accuracy and currency is the responsibility of the data owner; USGS evaluates the authoritativeness of the source but does not independently verify data accuracy. Trails are not complete, and will not be complete for the foreseeable future. Trails will be added as data become available from land management agencies and other authoritative sources. All recreational trails information presented on US Topo maps is public domain, though the original source data is not necessarily public domain. This metadata section documents all data sources for all maps, not this specific map. Trails listed here are not guaranteed to be present on all relevant maps, due to schedule differences between data providers and US Topo production schedules. Feature-level metadata is not provided in the US Topo product; there is no link between a line on the map and the source of that specific trail. Notes on data sources follow --------- For the 11 National Scenic Trails (NST): Ice Age National Scenic Trail: data provided by the volunteer organization Ice Age Trail Alliance, http://www.iceagetrail.org, in cooperation with National Park Service and Wisconsin Department of Natural Resources. -- Pacific Crest National Scenic Trail: unpublished data provided by US Forest Service -- Appalachian National Scenic Trail: data published by the Appalachian Trial Conservancy, http://appalachiantrail.org/about-the-trail, in cooperation with National Park Service -- North Country National Scenic Trail: unpublished dataset provided by National Park Service -- Arizona National Scenic Trail: data from AZGEO Clearinghouse, https://azgeo.az.gov/azgeo/, in cooperation with U.S. Forest Service -- Pacific Northwest National Scenic Trail: unpublished data provided by US Forest Service -- Natchez Trace National Scenic Trail: unpublished dataset provided by National Park Service ---------- For other trail types and sources: US Fish and Wildlife Service lands: the USFWS Hiking Trails Inventory is administered by the US Department of Transportation Federal Highway Administration, and Pacific Western Technologies, LTD. The purpose of the dataset is to create a baseline inventory of all non-motorized trails on US Fish and Wildlife Service Stations. -- US Forest Service lands: trails within National Forests are from published and unpublished data provided by USFS. These data are developed from sources of differing accuracy. US Topo does not portray access and travel management information indicating which trails are managed for or open to specific modes of travel (motorized/non-motorized) or associated seasons of use. -- The Bureau of Land management provides a limited amount of data for some of their lands. -- The International Mountain Bicycling Association, IMBA, shares their trails data with USGS as part of an ongoing partnership. IMBA-collected trails are not shown inside delineated Federal lands (e.g., National Forests) on US Topo maps.

Online Linkage

http://www.nps.gov/ncrc/programs/nts/nts_trails.html

Online Linkage

http://www.fws.gov/gis/data/national/

Online Linkage

https://www.imba.com/

Online Linkage

https://data.fs.usda.gov/geodata/

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

20171106

Ending Date

20171106

Source Currentness Reference

publication date

Contribution

Trail centerline

Source

Originator

Various government agencies

Publication Date

Publication Date

Title

Recreational Points of Interest

Geospatial Data Presentation Form

Vector digital data

Other Citation Details

Federal government land management agencies, including U.S. Forest Service, National Park Service, Fish and Wildlife Service, and Bureau of Land Management, have begun providing recreational points to USGS for inclusion on USGS topographic maps. These points include visitor centers, trailheads, campgrounds, picnic areas, ranger stations, and backcountry shelters. Coverage is not complete, and may not be consistent between agencies and land units. The number of these features, and consistency of coverage, will increase in the coming years. Most of these data are not yet published by the source agency.

Online Linkage

https://data.fs.usda.gov/geodata/

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

2012

Ending Date

2017

Source Currentness Reference

publication date

Contribution

Center points

Source

Originator

Federal Railroad Administration

Publication Date

Publication Date

Title

Transportation, Railroads

Geospatial Data Presentation Form

Vector digital data

Other Citation Details

Railroads are derived from data provided by the Federal Railroad Administration (FRA), U.S. Department of Transportation. This dataset was developed by Oak Ridge National Laboratory (ORNL) Geographic Information Science and Technology Group (GIST), but responsibility for maintenance was transferred to FRA in 2016, and is provided to USGS through an inter-agency agreement. The rail lines layer represents the freight lines of the nation's railroad system. The data set covers all 50 states and the District of Columbia, as well as territories and possessions of the United States. No rail lines exist in American Samoa, Guam, Northern Mariana Islands, and the Virgin Islands of the US.

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

20170516

Ending Date

20170516

Source Currentness Reference

publication date

Contribution

Main track centerlines

Source

Originator

Federal Aviation Administration

Publication Date

Publication Date

Title

Airports

Geospatial Data Presentation Form

Vector digital data

Other Citation Details

Airport points and runway polygons in the USGS National Transportation Dataset (NTD) are Federal Aviation Administration (FAA)-recognized public and private airports in the United States. The airport and runway datasets were initially digitized from a non-geospatial FAA resource from 2008-2011. The FAA attributes cross-walked into the USGS schema are the airport name, FAA code, and Runway_ID. The digitized data were inspected for accuracy and completeness then loaded into the NTD. Dataset is reviewed annually using FAA provided source data.

Online Linkage

http://www.faa.gov

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

20170413

Ending Date

20170711

Source Currentness Reference

publication date

Contribution

runways

Source

Originator

State and Federal Partners

Publication Date

Publication Date

Title

Fire Stations

Geospatial Data Presentation Form

Vector digital data

Other Citation Details

For purposes of USGS mapping, fire stations are defined as a location where fire fighters are stationed or based, or where equipment that such personnel use in carrying out their jobs is stored for ready use. Fire fighting training academies or locations are included. This dataset includes those locations primarily engaged in forest or grasslands fire fighting. This dataset includes both private and governmental entities. Locations that serve only administrative function are excluded. Locations serving both administrative and operational functions are included. This dataset was originally populated from a variety of sources, and is currently maintained in part with crowdsourcing methods by the USGS National Map Corps project.

Online Linkage

http://nationalmap.gov

Online Linkage

https://nationalmap.gov/TheNationalMapCorps/

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

20160727

Ending Date

20170903

Source Currentness Reference

ground condition

Contribution

Geographic features and feature names

Source

Originator

State and Federal Partners

Publication Date

Publication Date

Title

Hospitals

Geospatial Data Presentation Form

Vector digital data

Other Citation Details

Includes general medical and surgical hospitals, psychiatric, substance abuse and specialty hospitals such as Children's hospitals, cancer, maternity and rehabilitation hospitals. Other types of hospitals are included if represented in data sets provided by various partners for this compilation. Hospitals operated by the US Department of Veterans Affairs are included. Nursing homes, long term care facilities and Urgent Care facilities are generally excluded. Locations that are administrative offices only are excluded from the dataset. This dataset was originally populated from a variety of sources, and is currently maintained in part with crowdsourcing methods by the USGS National Map Corps project.

Online Linkage

http://nationalmap.gov

Online Linkage

https://nationalmap.gov/TheNationalMapCorps/

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

20170831

Ending Date

20170831

Source Currentness Reference

ground condition

Contribution

Geographic features and feature names

Source

Originator

State and Federal Partners

Publication Date

Publication Date

Title

Schools

Geospatial Data Presentation Form

Vector digital data

Other Citation Details

The schools within this dataset are composed of Public elementary and secondary education in the US as defined and tracked by the National Center for Education Statistics (NCES), Common Core Dataset (CCD). Private schools in this dataset are composed of Private elementary and secondary education in the US as defined by the Private School Survey, NCES. The colleges and Universities are composed of postsecondary education facilities as defined by the Integrated Post Secondary Education System (IPEDS), NCES. Included are Doctoral and Research Universities, Masters Colleges and Universities, Baccalaureate Colleges, Associates Colleges, Theological seminaries, Medical schools and other health care professions, schools of engineering and technology, business and management, art, music, design, Law schools, Teachers colleges, Tribal colleges and other specialized institutions. This dataset is currently maintained in part with crowdsourcing methods by the USGS National Map Corps project.

Online Linkage

http://nationalmap.gov

Online Linkage

https://nationalmap.gov/TheNationalMapCorps/

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

20080101

Ending Date

20081231

Source Currentness Reference

ground condition

Contribution

Geographic features and feature names

Source

Originator

U.S. Geological Survey

Publication Date

Publication Date

Title

Cemeteries

Geospatial Data Presentation Form

Vector digital data

Other Citation Details

The Geographic Names Information System (GNIS) is the Federal and national standard for geographic nomenclature. The U.S. Geological Survey developed the GNIS in support of the U.S. Board on Geographic Names as the official repository of domestic geographic names data, the official vehicle for geographic names use by all departments of the Federal Government, and the source for applying geographic names to Federal electronic and printed products. Cemeteries are one feature from the GNIS data base. Cemetery data are currently maintained in part with crowdsourcing methods by the USGS National Map Corps project

Online Linkage

https://nationalmap.gov/TheNationalMapCorps/

Online Linkage

http://geonames.usgs.gov/

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

19800115

Ending Date

20170831

Source Currentness Reference

publication date

Contribution

Geographic features and feature names

Source

Originator

U.S. Geological Survey

Publication Date

Publication Date

Title

Post Offices

Geospatial Data Presentation Form

Vector digital data

Other Citation Details

The Geographic Names Information System (GNIS) is the Federal and national standard for geographic nomenclature. The U.S. Geological Survey developed the GNIS in support of the U.S. Board on Geographic Names as the official repository of domestic geographic names data, the official vehicle for geographic names use by all departments of the Federal Government, and the source for applying geographic names to Federal electronic and printed products. Post Offices are one feature from the GNIS data base. Post office data are currently maintained in part with crowdsourcing methods by the USGS National Map Corps project, especially for establishing correct geographic positions.

Online Linkage

https://nationalmap.gov/TheNationalMapCorps/

Online Linkage

http://geonames.usgs.gov/

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

19990326

Ending Date

19990930

Source Currentness Reference

publication date

Contribution

Geographic features and feature names

Source

Originator

State and Federal Partners

Publication Date

Publication Date

Title

Law Enforcement

Geospatial Data Presentation Form

Vector digital data

Other Citation Details

Includes locations where sworn officers of a law enforcement agency are regularly based or stationed, primarily local police station locations. State and federal law enforcement agencies are generally excluded from this dataset. These data are currently maintained in part with crowdsourcing methods by the USGS National Map Corps project, especially for establishing correct geographic positions.

Online Linkage

https://nationalmap.gov/TheNationalMapCorps/

Online Linkage

http://nationalmap.gov

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

20160727

Ending Date

20171025

Source Currentness Reference

ground condition

Contribution

Geographic features and feature names

Source

Originator

U.S. Geological Survey

Publication Date

Publication Date

Title

Geographic Names Information System (GNIS)

Geospatial Data Presentation Form

Vector digital data

Other Citation Details

The Geographic Names Information System (GNIS) is the Federal and national standard for geographic nomenclature. The U.S. Geological Survey developed the GNIS in support of the U.S. Board on Geographic Names as the official repository of domestic geographic names data, the official vehicle for geographic names use by all departments of the Federal Government, and the source for applying geographic names to Federal electronic and printed products.

Online Linkage

http://geonames.usgs.gov/

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

19800115

Ending Date

20170831

Source Currentness Reference

publication date

Contribution

Geographic feature names

Source

Originator

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.

Publication Date

Publication Date

Title

Hydrography

Geospatial Data Presentation Form

Vector digital data

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). Spatial objects may be filtered or generalized to achieve a 1:24,000-scale representation.

Online Linkage

http://nhd.usgs.gov/

Online Linkage

http://nhd.usgs.gov/gnis.html

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

20020827

Ending Date

20170502

Source Currentness Reference

publication date

Contribution

Hydrography features and feature names

Source

Originator

U.S. Fish and Wildlife Service

Publication Date

Publication Date

Title

Wetlands - Emergent and Forest/Shrub

Geospatial Data Presentation Form

vector digital data

Other Citation Details

This data set represents the extent, approximate location and type of wetlands and deepwater habitats in the United States and its Territories. While the Fish and Wildlife Service produces a variety of wetland categories, only two (Emergent and Forest/Shrub wetlands as defined by Cowardin et al. (1979)) are included on US Topo Maps.The emergent wetlands depicted do not include lakes, rivers, open water ponds, deepwater marine and estuarine features or non-vegetated, farmed, intermittent and temporarily flooded wetlands. The goal is to provide a visual depiction of the approximate location and extent of Emergent and Forest/Shrub wetlands. Digital wetlands data are intended for use with base maps and digital aerial photography at a scale of 1:12,000 or smaller. Due to the scale, the primary intended use is for data display on the US Topo Maps. This data display is not intended for analysis. The map products were neither designed or intended to represent legal or regulatory products. Questions or comments regarding the interpretation or classification of wetlands can be addressed by visiting http://www.fws.gov/wetlands/FAQs.html These data were developed in conjunction with the publication Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of Wetlands and Deepwater Habitats of the United States. U.S. Department of the Interior, Fish and Wildlife Service, Washington, DC. FWS/OBS-79/31. For more information on the wetland classification codes visit http://www.fws.gov/wetlands/Data/Wetland-Codes.html. Note that coastline delineations were drawn to follow the extent of wetland features as described by this project and may not match the coastline shown in other base maps.

Online Linkage

http://www.fws.gov/wetlands/

Online Linkage

http://www.fws.gov/wetlands/FAQs.html

Online Linkage

http://www.fws.gov/wetlands/Data/Wetland-Codes.html

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

19811101

Ending Date

20100101

Source Currentness Reference

publication date

Contribution

Spatial information

Source

Originator

U.S. Census Bureau

Publication Date

Publication Date

Title

State and Equivalent Boundary

Geospatial Data Presentation Form

Vector digital data

Other Citation Details

The Census Bureau collects boundaries from state and county governments through the Boundary and Annexation Survey (BAS), and publishes the results as TIGER files. The USGS uses the TIGER data without editing or alteration for US Topo.

Online Linkage

https://www.census.gov/geo/maps-data/data/tiger-line.html

Online Linkage

https://www.census.gov/programs-surveys/bas.html

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

20160819

Ending Date

20160819

Source Currentness Reference

publication date

Contribution

State and Equivalent Boundary

Source

Originator

U.S. Census Bureau

Publication Date

Publication Date

Title

County and Equivalent Boundary

Geospatial Data Presentation Form

Vector digital data

Other Citation Details

The Census Bureau collects boundaries from state and county governments through the Boundary and Annexation Survey (BAS), and publishes the results as TIGER files. The USGS uses Census TIGER data without editing or alteration for US Topo.

Online Linkage

http://www.census.gov/geo/www/tiger/index.html

Online Linkage

https://www.census.gov/programs-surveys/bas.html

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

20140601

Ending Date

20160501

Source Currentness Reference

publication date

Contribution

County and Equivalent Boundary

Source

Originator

National Park Service - Land Resources Division

Publication Date

Publication Date

Title

Administrative Boundaries of National Park System Units

Geospatial Data Presentation Form

Vector digital data

Other Citation Details

This dataset depicts National Park Service unit boundaries for display and general analysis purposes. This data set is complete but subject to continual updates to reflect boundary amendments, legislation, and acquisitions, and improved processing techniques. The data is being regularly updated with verified boundaries from NPS Land Resources Division. The data is intended for use as a tool for display and general GIS analysis purposes only. It is in no way intended for engineering or legal purposes. The data accuracy is checked against best available sources which may be dated. NPS assumes no liability for use of this data. Boundaries from the Land Resources Division have separate polygons for each type of unit. For example Denali National Park and Denali National Preserve are separate individual polygons.

Online Linkage

https://irma.nps.gov/Portal

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

2002

Ending Date

2017

Source Currentness Reference

publication date

Contribution

Current Administrative Boundaries of the National Park System Units

Source

Originator

U.S. Dept. of Interior, Bureau of Land Management, Division of Support Services, Branch of Information Resource Management

Publication Date

Publication Date

Title

Public Land Survey System

Geospatial Data Presentation Form

Vector digital data

Other Citation Details

General: US Topo maps are not legal documents. The PLSS information shown on these maps is for general reference purposes only, and should not be used to determine legal boundaries or land ownership. The Bureau of Land Management (BLM) is the authoritative source for PLSS information at the federal level, and the US Topo representation is derived from BLM GIS data files. The management of these data is not completely uniform throughout the country. Notes for selected individual states follow ---- Alaska PLSS consists of protracted (computed, not surveyed) data only. For more information see http://sdms.ak.blm.gov/sdms/data_protracted_grid_gis.html ---- Ohio was the original PLSS state in the early 1800s, and the land network there is unusually complex. The source data include four first-division parcel types. These are all shown on US Topo maps, and are labeled according to BLM's attribution, with a leading letter followed by either a number or more letters. The meanings of the leading letters are: S=Section, F=Fractional Section, L=Lot, Q=Quarter Township.--- Surveys in some western states are too complex to depict completely on a general-purpose topographic map. Issues include separate and overlapping surveys, and land grants that pre-date the PLSS system. Old land grants are generally not shown on US Topo (though there are some exceptions), and in areas of overlapping surveys only one is shown.

Online Linkage

http://nationalcad.org/PLSSWorkgroup/PLSSWorkgroup.html

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

20141027

Ending Date

20170228

Source Currentness Reference

publication date

Contribution

Townships and ranges, sections

Source

Originator

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

Publication Date

Publication Date

Title

Hypsography

Geospatial Data Presentation Form

Vector digital data

Other Citation Details

Contours are generated from the USGS 3D Elevation Program (3DEP) 1/3 arc-second DEM data. The intended viewing scale for these features is 1:24,000. The contours generated from the 1/3 arc-second DEM data are, in some cases, modified by hydro-enforcement with the National Hydrography Dataset (NHD) flow lines and water bodies to improve hydro-contour integraion. Contours in areas where the 1/3 arc-second DEMs were generated for new high resolution lidar may not be hydro-enforced in this way, with the result that hydro features and contours may not visually align. Contours are generated primarily for use as a layer in GeoPDFs created in the US Topo digital mapping program, and for corresponding vector products. The 1/3 arc-second product is derived from a wide variety of sources, with varying accuracies. As of 2017, only about 30% of the country has been covered with lidar elevation data. 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.

Online Linkage

https://nationalmap.gov/3DEP/

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

20031201

Ending Date

20111001

Source Currentness Reference

publication date

Contribution

Contours

Source

Originator

U.S. Geological Survey

Publication Date

Publication Date

Title

Land Cover - Woodland

Geospatial Data Presentation Form

Vector digital data

Other Citation Details

The Woodland Tint is a derivative land cover product created using several national map layers: three National Land Cover Database (NLCD) 2011 raster layers (Tree Canopy, Imperviousness, and Land Cover); and two vector layers (National Hydrography Dataset and Transportation). The process begins with masking the NLCD 2011 Tree Canopy Data cartographic with NLCD 2011 Imperviousness (values from 1-100), and NLCD 2011 Land Cover (value 11 = Open Water). The resulting raster data with canopy values of 20 and greater are converted to woodland vector polygons and smoothed via the Paek Algorithm. The woodland polygons are masked with buffered Transportation (Roads, Airport Runways, and Railroads) and Hydrography (NHD Areas excluding Inundation Area and NHD Waterbodies excluding Swamp/Marsh). The resulting polygons are checked for scale appropriate size (minimum size of one acre), and the small woodland polygons as well as small clearings within the woodland polygons are deleted. For Hawaii and Puerto Rico, two National Land Cover Database (NLCD) raster layers (Tree Canopy 2011 and Imperviousness 2001): and two vector layers(National Hydrography Dataset and Transportation) are used. The resulting raster data is carried out as before to produce the polygon vector data. For Alaska, the Woodland Tint is a derivative land cover product created using five national map layers: one raster layer, National Land Cover Database (NLCD) 2011 (Land Cover); and four vector layers (National Hydrography Dataset, Transportation Roads, Transportation Airports and Transportation Railroads). The process begins with combining three NLCD 2011 Land Cover V1 Classes (41 - Deciduous Forest, 42 - Evergreen Forest, and 43 - Mixed Forest). The resulting raster data was converted to woodland vector polygons, and smoothed via the Paek Algorithm. The woodland polygons are masked with buffered Transportation (Roads, Airport Runways, and Railroads) and Hydrography (NHD Areas excluding Inundation Areas and NHD Waterbodies excluding Swamp/Marsh). The resulting polygons are checked for scale appropriate size (minimum size of one acre), and the small woodland polygons as well as small clearings within the woodland polygons are deleted.

Online Linkage

http://nationalmap.gov

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

20010101

Ending Date

20110101

Source Currentness Reference

publication date

Contribution

National Landcover Dataset; National Hydrography Dataset; National Transportation Dataset

Source

Originator

U.S. Geological Survey

Publication Date

Publication Date

Title

Shaded Relief

Geospatial Data Presentation Form

raster digital data

Other Citation Details

The Shaded relief is a derivative elevation product created from the USGS 3D Elevation Program (3DEP) 1/3 arc-second DEM data. First there are five separate shaded relief datasets created from the original data. Each shaded relief has different azimuths and altitude values as follows: 00 450, 1350 600, 2700 450, 3150 450, 450 450. These five datasets are then combined into one feature class using map algebra to compute the raster layers using the following equation shadedrelief1 + shadedrelief2 + shadedrelief3 + (shadedrelief4 x 2) + shaded relief5 \ 6. This equation gives double importance to the 3150 azimuth and 450 elevation.

Source Scale Denominator

24000

Type of Source Media

digital data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

19880101

Ending Date

20070101

Source Currentness Reference

publication date

Contribution

3D Elevation Program

Source

Originator

U.S. Geological Survey

Publication Date

Publication Date

Title

Grids and Coordinate System

Other Citation Details

Geographic Coordinate, U.S. National Grid, and UTM grid values are displayed along the map projection.

Source Scale Denominator

24000

Type of Source Media

raster data

Source Temporal Extent

Time Period Information

Range of Dates/Times

Beginning Date

Publication Date

Ending Date

Publication Date

Source Currentness Reference

publication date

Contribution

U.S. National Grid, UTM grid.