U.S. Geological Survey, 200101, URBANAP020 - National Atlas Urban Areas of the United States: U.S. Geological Survey, Reston, Virginia.Online Links:
- <http://nationalatlas.gov/atlasftp.html>
- <http://coastalmap.marine.usgs.gov/GISdata/basemaps/usa/urban/urbanap020.zip>
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees.
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is Geodetic Reference System 80.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257222.
Sequential unique whole numbers that are automatically generated.
| Value | Definition |
|---|---|
| Polygon | A 2-dimensional element. |
Coordinates defining the features.
There is no predefined set of valid urban area names. Name represents the most significant place that is in the polygon.
| Formal codeset | |
|---|---|
| Codeset Name: | Codes for the Identification of the States, the District of Columbia and the Outlying Areas of the United States, and Associated Areas, FIPS 5-2. |
| Codeset Source: | U.S. Department of Commerce, National Institute of Standards and Technology |
| Formal codeset | |
|---|---|
| Codeset Name: | Codes for the Identification of the States, the District of Columbia and the Outlying Areas of the United States, and Associated Areas, FIPS 5-2. |
| Codeset Source: | U.S. Department of Commerce, National Institute of Standards and Technology |
Gita Urban-Mathieux
U.S. Geological Survey
521 National Center
Reston, VA 20192
703-648-5175 (voice)
atlasmail@usgs.gov
These data are intended for geographic display and analysis at the national level, and for large regional areas. The data should be displayed and analyzed at scales appropriate for 1:2,000,000-scale data. No responsibility is assumed by the U.S. Geological Survey in the use of these data.
National Atlas of the United States and the United States Geological Survey, 2001, Urban areas of the United States (urbanap020): U.S. Geological Survey, Reston, VA.Online Links:
U.S. Geological Survey, 1998, State Boundaries of the United States: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 1998, Cities and Towns of the United States: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 1998, Hydrography Features of the United States: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 1998, Urban Areas of the United States: U.S. Geological Survey, Reston, Virginia.
The State in which the urban area is located was also added.
Several areas were modified to conform to the 1:2,000,000-scale hydrography (ATLAS-HY) layer. Some smaller polygons that represent undeveloped areas within the urban area were removed and merged with the larger urban area. Military reservations were also removed. Finally, the attribute for State FIPS was added.
Data sources used in this process:
Data sources produced in this process:
Data sources used in this process:
Data sources produced in this process:
Person who carried out this activity:
Valerie PaskevichData sources used in this process:
U.S. Geological Survey
Information Specialist, GIS Coordinator
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA
(508) 548-8700 x2281 (voice)
(508) 457-2310 (FAX)
vpaskevich@usgs.gov
Data sources produced in this process:
The geospatial part of this data set was originally extracted from the Digital Chart of the World at 1:1,000,000-scale with some geospatial data from a USGS 1:2,000,000-scale hydrography layer. It was updated several times using various sources whose horizontal positional accuracies are unknown.
This data set contains urban areas for the 50 United States.
No additional checks for topological consistency were performed on this data set.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints:
- Public domain data from the U.S. government are freely redistributable with proper metadata and source attribution. Acknowledgment of the National Atlas of the United States of America and (or) the U.S. Geological Survey would be appreciated in products derived from these data.
Earth Science Information Center, U.S. Geological Survey
507 National Center
Reston, VA 20192
1-888-ASK-USGS (1-888-275-8747) (voice)
- Contact_Instructions:
- In addition to the address above, there are other ESIC offices throughout the country. A full list of these offices is at <http://mapping.usgs.gov/esic/esic_index.html>.
Downloadable Data: urbanap020.tar.gz
Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made by the U.S. Geological Survey regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. No responsibility is assumed by the U.S. Geological Survey in the use of these data.
| Data format: | ESRI Shapefile |
|---|---|
| Network links: |
<http://nationalatlas.gov/atlasftp.html> |
| Data format: | SDTS |
|---|---|
| Network links: |
<http://nationalatlas.gov/atlasftp.html> |
There is no charge for the online option. For National Atlas files ordered on CD-ROM there is a base price of $45.00 per disc, a handling fee of $5.00, and a per-file charge based on file size. The charge for files less than 10 megabytes in size is $1.00. The charge for files that range in size from 10 to 150 megabytes is $7.50. The charge for files of 150 megabytes or larger is $15.00. The charge is $1.00 for the Urban Areas of the United States data set.
To order files on CD-ROM, please see <http://nationalatlas.gov/atlasftp.html#q12>.
The data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS® or ArcView® 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing data. A free data viewer, arcexplorer, is available from ESRI at www.esri.com.
U.S. Geological Survey
c/o Valerie Paskevich
Information Specialist, GIS Coordinator
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA
(508) 548-8700 x2281 (voice)
(508) 457-2310 (FAX)
vpaskevich@usgs.gov
Downloadable Data: urbanap020.zip
Although this data set has been used by the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
| Data format: | Zip file containing the shapefile components, browse graphic, and an ASCII version of the metadata file. in format ESRI Shapefile zip archive Size: 7.546 |
|---|---|
| Network links: |
<http://coastalmap.marine.usgs.gov/GISdata/basemaps/usa/urban/urbanap020.zip> |
The data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS® or ArcView® 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing data. A free data viewer, arcexplorer, is available from ESRI at www.esri.com.
Valerie Paskevich
U.S. Geological Survey
Information Specialist, GIS Coordinator
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA
(508) 548-8700 x2281 (voice)
(508) 457-2310 (FAX)
vpaskevich@usgs.gov
