Illinois Department of Natural Resources, 1994, Active and Abandoned Railroads in Illinois by County: IGIS GIS Database rails.Online Links:
- Gain Access to Illinois Datasets by County. <URL:http://www.isgs.uiuc.edu/nsdihome/webdocs/county.html>
- Text (.txt) version of this Metadata file. (Shift-Click to download documentation) <URL:http://www.isgs.uiuc.edu/nsdihome/outmeta/rails.txt>
- HTML (.html) version of this Metadata file. (Shift-Click to download documentation) <URL:http://www.isgs.uiuc.edu/nsdihome/outmeta/rails.html>
This is a Vector data set.
The map projection used is Lambert Conformal Conic.
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest unknown
Ordinates (y-coordinates) are specified to the nearest unknown
Planar coordinates are specified in feet
The horizontal datum used is NAD27.
The ellipsoid used is CLARKE1866.
The semi-major axis of the ellipsoid used is 6378206.4 meters.
The flattening of the ellipsoid used is 1/294.98.
RAILCLASS - Status of railroads.
from Railroads of Illinois, 1991,
Ill. Dept. of Transportation.
Domain:
1 - active
2 - abandoned as of IDOT map of January 1, 1991
3 - AMTRAK, active
SIDING - One or more single tracks branching off
from a main line of a railroad. USGS Major
code 180, Minor code 208.
from USGS Standards for Digital Line Graphs, 1987.
Domain:
0 - Not a siding
1 - arc is a siding, as coded by USGS in DLG files,
Major code 180, Minor code 208.
NUM_TRACKS - Number of tracks represented by a single line.
from USGS Standards for Digital Line Graphs, 1987.
Domain: positive integer
AMODIFIER - Indicates lineage or other information
about the rail line represented by each arc.
from USGS Standards for Digital Line Graphs,
USGS, 1987. Illinois Department of Energy and
Natural Resources.
Domain:
101 - added to original data by INHS
601 - in tunnel
602 - Overpassing on bridge
605 - Underpassing
607 - Under structure
613 - US Government
ARBITRARY - Arbitrary line extension, formerly USGS DLG
Minor code 210.
from USGS Standards for Digital Line Graphs,
USGS, 1987.
Domain:
0 - non-arbitrary
1 - arbitrary
OWNER - Character code indicating owner of the line.
AMTRAK uses some of these lines. See attribute
RAILCLASS.
from Illinois Department of Transportation
Domain: See the file *path_name_suppressed*/rails.lst.
Note: AMTRAK is coded in RAILCLASS and operates
on some of these lines.
COINCIDENT - DLG feature code indicating the type of feature
in other DLG data sets with which this arc is
coincident. This attribute was carried over from
the original DLG data set and has not been checked
or maintained.
Domain: Refer to USGS DLG Users Guide
GIS Processing: INHS Staff Documentation: D. Nelson and S. Beaverson Quality Control: INHS Staff
217-333-4747 (voice)
217-244-0802 (FAX)
isgs@isgs.uiuc.edu
These data are appropriate for use in local and regional thematic analysis involving railroads. All railroads contained in USGS 1:100,000 DLG files are included. These data were corrected and updated as of 1991. Data are not appropriate as a geodetic or engineering base.
Survey, US Geological , 1980-1991, US Geological Survey 1:100,000 Digital Line Graph files, transportation layer.
All data were evaluated and compared to Illinois Department of Transportation Railroad Map for Illinois, January 1, 1991.
Accuracy of 1:100,000 analog map based on USGS National Map Accuracy Standards.
No statement of completeness was provided with the original USGS DLG data. Visual inspection and use suggests that coverage is comprehensive but reflective of the date of each source map publication date. This date varies across the state.
Data set is topologically structured linear data with nodes at all intersections. Pseudo nodes (nodes between arcs with common attribute values across all non-system attribute fields) may exist on some arcs.
Are there legal restrictions on access or use of the data?
- Access_Constraints: none
- Use_Constraints:
- Reproduction or redistribution of copyrighted digital data sets or products derived therefrom outside of licensee's organization or entity is expressly forbidden. The only exception is redistribution to consultants working for the licensee, and then only for purposes, related to work for the licensee. Such consultants may not further reproduce or redistribute these data sets. None of these data shall be electronically duplicated on magnetic or optical media for use by others, in whole or in part, without permission of the appropriate custodial division within DNR.
Any hardcopies utilizing DNR data sets shall clearly indicate their source. If the licensee has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. Licensee specifically agrees not to misrepresent DNR data sets, nor to imply that changes they made were approved by DNR.
These data are not to be used for commercial profit.
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217-244-0802 (FAX)
isgs@isgs.uiuc.edu
An Arc/Info .e00 (export) file is currently available free of charge at the Illinois Natural Resources Geospatial Data Clearinghouse. Refer to the Citation Information portion of this file for access to downloadable data and metadata. Shift-click to download the data set and related documentation. (Data and metadata offered separately via the Illinois Datasets by County browse area, please download both files.)
The Illinois Department of Natural Resources (DNR) provides these geographic data "as is." DNR makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. DNR further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers of DNR, no warranty, expressed or implied, is made by DNR regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty.In no event shall the DNR have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by DNR.
217-333-4747 (voice)
217-244-0802 (FAX)
isgs@isgs.uiuc.edu
Illinois Natural Resources Geospatial Data Clearinghouse
Generated by mp version 2.8.11 on Mon Jan 29 15:19:42 2007