U.S. Geological Survey Earth Resources Observation & Science Center (EROS), 19940506, DLG 100K for Quad: JACKSON LAKE-W, WY - ID # : 1J067724WPL10429-1426386: U.S. Geological Survey, Sioux Falls, SD 57198 USA.
This is a vector data set.
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 2.54
Ordinates (y-coordinates) are specified to the nearest 2.54
Planar coordinates are specified in 2.54
The horizontal datum used is unknown.
The ellipsoid used is Clark 1866.
The semi-major axis of the ellipsoid used is 6378206.4.
The flattening of the ellipsoid used is 1/294.98.
DLGs depict information about geographic features on or near the surface of the Earth, terrain, and political and administrative units. These data were collected as part of the National Mapping Program.
U.S. Geological Survey or another mapping agency in cooperation with USGS., 19810101, JACKSON LAKE: U.S. Geological Survey, Reston, Virginia.
Person who carried out this activity:
Person who carried out this activity:
The identification of features is provided by the distinct electromagnetic energy it emits,reflects, or otherwise transmits. This is called the spectral signature. Other signatures such as tone (lightness or darkness), texture (surface roughness or smoothness), pattern,shadow, shape, and size are as important. Thus, through the use of the thematic mapper sensor, such elements as water features, soils, and vegetation can be identified and distinguished from each other.
For Digital Revision Status = Not revised:
For Hypsography and Hydrography Only: For Digital Revision Status = Not revised:
For Digital Revision Status = Not revised: Data completeness reflects the content of the source quadrangle. Features may have been eliminated or generalized on the source graphic due to scale and legibility constraints. For Digital Revision Status = Limited Update: This file has undergone a limited update digital revision. The file contains only: (1) those features that are photoidentifiable on monoscopic source, supplemented with limited ancillary source, and (2) those features, present on the original source quadrangle, that cannot be reliably photoidentified but that are not considered particularly prone to change. For Digital Revision Status = Standard Update: This file has undergone standard update digital revision. The data completeness of this file meets NMD standards for feature content.
Topological requirements specify that: (1) lines must begin and end at nodes; (2) lines must connect to each other at nodes; (3) lines do not extend through nodes; (4) left and right areas are defined for each line element and are consistent throughout the file; (5) and the lines representing the limits of the file (neatline) are free of gaps. The tests of logical consistency areperformed by the USGS PROSYS program. The neatline was generated by connecting the four corners of the digital file, as established during initialization of the digital file. All data outside the enclosed region are ignored and all data crossing these geographically straight lines is clipped at the neatline. Neatline straightening aligns the digitized edges of the digital data with the generated neatline or the longitude/latitude lines in geographic coordinates. All internal areas are tested for closure using PROSYS.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- There is no guarantee of warranty concerning the accuracy of these data. Users should be aware that temporal changes may have occurred since the data was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of their limitations. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data set is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data set, nor to imply that changes made were approved or endorsed by the U.S. Geological Survey. Please refer to <http://www.usgs.gov/privacy.html> for the USGS disclaimer.
1:100,000-scale digital line graphs
Although these data have been processed successfully on a computer system at the USGS, no warranty expressed or implied is made by the USGS regarding the use of the data on any other system, nor does the act of distribution constitute any such warranty.
|Data format:||SDTS Topological Vector Profile|
|Media you can order:||
(format ISO 9660)
Note: This CD-ROM can be used with all computer operating systems that support CD-ROM as a logical storage device. All text files on the disc are in ASCII format. Data files are in ASCII or binary format.
Typically, all data available from USGS/EROS are downloadable at no cost to the user. there are some cases when a service fee is required to convert the analog film record to a digital file. This non-refundable fee is $30 per scene/frame.
Consult the data sets product page for specific information.
A majority of the data are available for immediate downloading. Specific data processing may take 24 to 48 hours and film scanning service requests involving payment to USGS can require 3 - 4 weeks upon successful payment of the request.
Adequate computer capability is the only technical prerequisite for viewing data in digital form. You may return here at any time and add to your data request before final submission.