rails_active

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: US Geological Survey-National Mapping Division
Publication_Date: 1987
Title:
rails_active
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Reston, Virginia
Publisher: US Geological Survey-National Mapping Division
Other_Citation_Details:
NCCGIA distributes this dataset
Online_Linkage: CGDB layer listing and Metadata - http://www.cgia.state.nc.us/cgdb/index.html
Description:
Abstract:
The US Geological Survey-National Mapping Division created
the 1:100,000-scale Railroads data from their published maps. The 1:24,000
scale railroads were derived from USGS's DLG (Digital Line Graph) Program
The NC Center for Geographic Information and Analysis, combined these
two data sources to develop the NC statewide Transportation-Railroads
digital data as a base layer showing railroad features. 24 k data was
use when duplicate tracks existed from both sources.
Purpose:
This data was created to assist governmental
agencies and others in making resource management
decisions through use of a Geographic Information System (GIS).
Supplemental_Information:
Refer to "USGS Digital Cartographic Data Standards,"
circular 895-G for USGS Coding Classification. Also, see
www.usgs.gov for further information on the DLG Program.

>system filename : rr24_100  approx. file size = 2.4 mb
>
>Revisions and updates to this layer include:
>3) filename: rr24_1001298 - the December, 1998 release of this
>data was the first release as a statewide combined file. This
>file is a combination of the 24 k dlg data previously stored
>by quad tile, and the 100k statewide rail file from the 100k
>dlg data.
>2) filename: rrt10098  This is the 100k rail only (superceded
>by the combined file) in the 83/sp/m projection. This was
>performed in 1998. This is a statewide file.
>3) filename: rrt10087  The 1987 version was the first release
>of the 100k rail data. This is a statewide file.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 19981201
Currentness_Reference:
First CGIA release date.
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -84.291771
East_Bounding_Coordinate: -76.090573
North_Bounding_Coordinate: 36.582433
South_Bounding_Coordinate: 33.901858
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: DLG
Theme_Keyword: railroads
Theme_Keyword: transportation
Place:
Place_Keyword_Thesaurus: William S. Powell, The North Carolina GAZETTEER, A Dictionary of Tar Heel Places, (Chapel Hill: University of North Carolina Press), August 1984.
Place_Keyword: North Carolina
Access_Constraints: None
Use_Constraints:
Acknowledgement of products derived from this
data set should cite the following: The source of the
Transportation- Railroads (1:24,000/1:100,000)
data is the North Carolina Corporate Geographic
Database. Earlier versions of this dataset may exist. The user
must be sure to use the appropriate data set for the time period
of interest.  While efforts have been made to ensure that these
data are accurate and reliable within the state of the art,
CGIA cannot assume liability for any damages or
misrepresentation caused by any inaccuracies in the data or
as a result of changes to the data caused by system transfers.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NC Center for Geographic Information and Analysis
Contact_Address:
Address_Type: Mailing and physical address
Address:
301 North Wilmington Street, Suite 700
City: Raleigh
State_or_Province: North Carolina
Postal_Code: 27601-2825
Country: U.S.A.
Contact_Voice_Telephone: (919)733-2090
Contact_Facsimile_Telephone: (919)715-0725
Contact_Electronic_Mail_Address: dataq@cgia.state.nc.us
Hours_of_Service: 8:30am to 5:30pm
Contact Instructions:
Preferred contact is by email
Data_Set_Credit:
>US Geological Survey (USGS)
>North Carolina Department of Transportation (NCDOT)
>
>NCCGIA Director, Karen Siderelis
>Database Administration, Zsolt Nagy
>Database Management, Ken Shaffer
>North Carolina Center for Geographic Information and Analysis
>Governor's Office
>Office of State Planning
>301 North Wilmington Street, Suite 700
>Raleigh, NC 27601-2825
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 8.3.0.800
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The digital line graphs (DLGs)for
transportation - railroads were delineated on USGS 1:100,000-scale
topographic maps and 1:24,000 scale topographic maps and attributed
with USGS DLG codes.  The digital files were supplied to NC CGIA who
edits the attributes as changes occur.  The two datasets were merged
to fill in gaps that occured in both datasets allowing for a more
complete statewide railroad coverage.
Logical_Consistency_Report:
Using ESRI's ARC/INFO GIS software, the data set was built for arc topology
using the "build" command. Topology has not been edited since the last
build.
Completeness_Report:
These data represent transportation features for railroads, as determined
by the US Geological Survey 1:100,000-scale Digital Line Graph program and
1:24,000-scale Digital Line Graph program. Each feature is attributed with
various DLG codes. Data represent all known railroads at time of publication
of sources.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Features were delineated on USGS 30 x 60 Minute and 7.5 minute series
topographic maps, which meet National Map Accuracy Standards. The
DLGs were digitized and supplied to NC CGIA who converted them into
ARC/INFO format. The data was projected, and features are added as
changes occur.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey or another mapping agency in cooperation with USGS.
Publication_Date: Unknown
Title:
The Topographic Map Names Data Base designation for the source quadrangle.
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Reston, Virginia
Publisher: U.S. Geological Survey
Other_Citation_Details:
Data is updated irregularly.
Source_Scale_Denominator: 24000
Type_of_Source_Media: stable-base material
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1938
Ending_Date: 1990
Source_Currentness_Reference:
ground condition
Source_Citation_Abbreviation:
MAP1
Source_Contribution:
spatial and attribute information
Source_Information:
Source_Citation:
Citation_Information:
Originator: US Geological Survey
Publication_Date: Unknown
Title:
Digital Line Graphs
Geospatial_Data_Presentation_Form: Map
Publication_Information:
Publication_Place: Reston, Virginia
Publisher: US Geological Survey
Other_Citation_Details:
USGS 1:100,000-scale DLG Program
Source_Scale_Denominator: 100000
Type_of_Source_Media: Paper
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1984
Ending_Date: 1986
Source_Currentness_Reference:
Publication dates of quadrangles
Source_Citation_Abbreviation:
None
Source_Contribution:
Digital Line Graphs
Process_Step:
Process_Description:
For Digital Revision Status = Not digitally revised:
This Digital Line Graph was digitized from the USGS source
quadrangle, by either the National Mapping Division, one of
their cooperators, or one of their contractors.  The digital data
were produced by one of the following methods:
- scanning a stable-based copy of the graphic materials.
The scanning process captured the digital data at a
scanning resolution of at least 0.001 inches;  the
resulting raster data were vectorized and then attributed
on an interactive editing station.
o scanning the paper map.  The scanning process captured
the digital data at a scanning resolution of at least
0.001 inches;  the resulting raster data were vectorized
and then attributed on an interactive editing station.
- scanning a stable-based copy of the graphic materials.
The resulting raster data were then manually digitized
and attributed on an interactive editing station.  The
resolution of the digital data is at least 0.001 inches.
o scanning the paper map.  The resulting raster data were
then manually digitized and attributed on an interactive
editing station.  The resolution of the digital data is
at least 0.001 inches.
- manually digitizing from a stable-based copy of the
graphic material using a digitizing table to capture the
digital data at a resolution of at least 0.001 inches;
attribution was performed either as the data were
digitized, or on an interactive edit station after the
digitizing was completed.
- manually digitizing from the paper map using a digitizing
table to capture the digital data at a resolution of at
least 0.001 inches;  attribution was performed either as
the data were digitized, or on an interactive edit
station after the digitizing was completed.
The determination of the DLG production method was based on
various criteria, including feature density, feature
symbology, and availability of production systems.  Four
control points corresponding to the four corners of the
quadrangle were used for registration during data
collection.  An eight parameter projective transformation
was performed on the coordinates used in the data collection
and editing systems to register the digital data to the
internal coordinates used in PROSYS, and a four parameter linear
transformation was performed from the PROSYS internal coordinates
to Universal Transverse Mercator (UTM) grid coordinates.  The DLG
data were checked for position by one or more of the following
processes:
- comparing plots of the digital data to the graphic source.
- comparing the digital data to the digital raster scan.
DLG data classification was checked by at least one of the
following processes.
- comparing plots of the digital data to the graphic source
- comparing the digital data to the digital raster scan.
Source_Used_Citation_Abbreviation:
MAP1
Process_Date: Unknown
Process_Step:
Process_Description:
NCCGIA received the dlg linework for the railroads from the USGS
in a digital format.  These files were refined at NCCGIA, including
edgematching, deletion of neatlines. Errors in dlg label codes or
inconsistencies in label order are corrected as they are found.
Additional linework is added as needed. The 24,000 and 100,000 scale
data was combined into one statewide file for ease of use.
Process_Date: 19981201
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NCCGIA
Contact_Address:
Address_Type: Mailing and physical address
Address:
301 North Wilmington Street, Suite 700
City: Raleigh
State_or_Province: North Carolina
Postal_Code: 27601-2825
Country: U.S.A.
Contact_Voice_Telephone: (919) 733-2090
Contact_Facsimile_Telephone: (919)715-0725
Contact_Electronic_Mail_Address: dataq@cgia.state.nc.us
Hours_of_Service: 8:30AM - 5:30PM
Contact Instructions:
Phone and electronic mail preferred
Process_Step:
Process_Description:
Metadata imported.
Source_Used_Citation_Abbreviation:
C:\DOCUME~1\stacey\LOCALS~1\Temp\xml206.tmp
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Spatial_Data_Organization_Information:
Indirect_Spatial_Reference_Method:
_Method: None
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 6456
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Node, planar graph
Point_and_Vector_Object_Count: 2185
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Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: State Plane Coordinate System 1983
State_Plane_Coordinate_System:
SPCS_Zone_Identifier: 3200
Lambert_Conformal_Conic:
Standard_Parallel: 34.333333
Standard_Parallel: 36.166667
Longitude_of_Central_Meridian: -79.000000
Latitude_of_Projection_Origin: 33.750000
False_Easting: 609601.220000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.002048
Ordinate_Resolution: 0.002048
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
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Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: rails_active
Entity_Type_Definition:
Railroad features as designated on USGS 24,000 and 100,000 scale digital line graphs.
Entity_Type_Definition_Source:
US Geological Survey, National Mapping Div.
Attribute:
Attribute_Label: FID
Attribute_Definition:
Internal feature number.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 14163
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute_Measurement_Frequency:
None planned
Attribute:
Attribute_Label: Shape
Attribute_Definition:
Feature geometry.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2
Range_Domain_Maximum: 1424
Unrepresentable_Domain:
Coordinates defining the features.
Attribute_Measurement_Frequency:
None planned
Attribute:
Attribute_Label: FNODE_
Attribute_Definition:
Internal number of poly to left of arc
Attribute_Definition_Source:
Software computed
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 2
Attribute_Measurement_Frequency:
None planned
Attribute:
Attribute_Label: TNODE_
Attribute_Definition:
Internal number of poly to right of arc
Attribute_Definition_Source:
Software computed
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 2
Attribute_Measurement_Frequency:
None planned
Attribute:
Attribute_Label: LPOLY_
Attribute_Definition:
Length of arc in coverage units
Attribute_Definition_Source:
Software computed
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 23.828
Range_Domain_Maximum: 60371.680
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.001
Attribute_Measurement_Frequency:
As needed
Attribute:
Attribute_Label: RPOLY_
Attribute_Definition:
Internal feature number
Attribute_Definition_Source:
Software computed
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 10837
Attribute_Measurement_Frequency:
As needed
Attribute:
Attribute_Label: LENGTH
Attribute_Definition:
Internal identification number
Attribute_Definition_Source:
User defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 3006
Attribute_Measurement_Frequency:
As needed
Attribute:
Attribute_Label: RAILTRAILS
Attribute_Definition:
Major DLG numeric code
Attribute_Definition_Source:
USGS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: USGS DLG Codes
Codeset_Source: USGS Digital Cartographic Data Standards, circular 895-G
Attribute_Measurement_Frequency:
As needed
Attribute:
Attribute_Label: RAILTRAI_1
Attribute_Definition:
Minor DLG numeric code
Attribute_Definition_Source:
USGS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: USGS DLG Codes
Codeset_Source: USGS Digital Cartographic Data Standards, circular 895-G
Attribute_Measurement_Frequency:
As needed
Attribute:
Attribute_Label: MAJOR1
Attribute_Definition:
Scale of feature source
Attribute_Definition_Source:
The scale denominator of the feature source
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 100000
Enumerated_Domain_Value_Definition:
Source is 1:100,000-scale dlgs
Enumerated_Domain_Value_Definition_Source:
NC CGIA
Enumerated_Domain:
Enumerated_Domain_Value: 24,000
Enumerated_Domain_Value_Definition:
Source is 1:24,000-scale dlgs
Enumerated_Domain_Value_Definition_Source:
NC CGIA
Attribute_Measurement_Frequency:
As needed
Attribute:
Attribute_Label: MINOR1
Attribute:
Attribute_Label: SCALE
Overview_Description:
Entity_and_Attribute_Overview:
An arc coverage depicting the
locations of railroads mapped in both 1:24,000 and 1:100,000 scales
delineated by the US Geological Survey.  The arc attribute table (AAT) has
data including to- and from-node identifiers, left- and right-
side polygon identifiers, length of linear feature in meters, and two
internal identification numbers.  There are three additional items, which
describe the features, according to USGS Digital Line Graph codes, as well
as a base map scale attribute.

>COLUMN  ITEM NAME     WDTH OPUT TYP N.DEC  ALTERNATE NAME
>1       FNODE#          4    5  B    -     From node id
>5       TNODE#          4    5  B    -     To node id
>9       LPOLY#          4    5  B    -     Left poly id
>13      RPOLY#          4    5  B    -     Right poly id
>17      LENGTH          4   12  F    3     Length in meters
>21      RR24_100#       4    5  B    -     Internal id
>25      RR24_100-ID     4    5  B    -     Internal id
>29      MAJOR1          6    6  I    -     USGS DLG code
>35      MINOR1          6    6  I    -     USGS DLG code
>41      SCALE           6    6  I    -     Base map scale
Entity_and_Attribute_Detail_Citation:
Refer to USGS Digital Cartographic Data Standards, circular 895-G for
descriptions of the DLG major/minor codes.
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NC Center for Geographic Information and Analysis
Contact_Position: Production Services
Contact_Address:
Address_Type: Mailing and physical address
Address:
301 North Wilmington Street, Suite 700
City: Raleigh
State_or_Province: North Carolina
Postal_Code: 27601-2825
Country: USA
Contact_Voice_Telephone: (919) 733-2090
Contact_Facsimile_Telephone: (919) 715-0725
Contact_Electronic_Mail_Address: dataq@cgia.state.nc.us
Hours_of_Service: 8:30AM - 5:30PM
Contact Instructions:
Phone and electronic mail preferred
For current price information use a web browser:
COST INFORMATION - http://www.cgia.state.nc.us/cost.html
Resource_Description: Transportation- Railroads (1:24,000/1:100,000)
Distribution_Liability:
NCCGIA is charged with the development and maintenance
of the State's corporate geographic  database and, in
cooperation with other mapping  organizations, is
committed to offering its users accurate, useful, and
current information about the state. Although every
effort has been made to ensure the accuracy of information,
errors and conditions originating from physical sources
used to develop the corporate database may be reflected
in the data supplied.  The client must be aware of data
conditions and bear responsibility for the appropriate
use of the information with respect to possible errors,
original map scale, collection methodology, currency
of data, and other conditions specific to certain data.
NCCGIA does not support secondary distribution of this
data.  The use of trade names or commercial products does
not constitute their endorsement by the NCCGIA or North
Carolina State Government.
Standard_Order_Process:
Non-digital_Form:
FOR DIGITAL OR NON-DIGITAL DATA, Contact NC CGIA, Data Distribution to order data, Phone 919.733.2090 ... Email dataq@cgia.state.nc.us ... Web Page order form http://www.cgia.state.nc.us/cgdb/index.html
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 1.805
Fees: For current FORMAT/MEDIA INFORMATION, use a web browser: http://www.cgia.state.nc.us/cost.html or phone NC CGIA Data Distribution 919.733.2090
Custom_Order_Process:
Data creation and large data analysis jobs contact
Database Administration P:(919)733-2090. All data
is available through standard ordering procedures on a
cost recovery basis.
Technical_Prerequisites:
All formats supplied are created using ARC/INFO GIS software on Unix workstations. Other formats are available. Format compatibility is the user's responsibility. For more information on formats and media, use a web browser: FORMAT/MEDIA INFORMATION - http://www.cgia.state.nc.us/cost.html
Available_Time_Period:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19981201
Ending_Date: Present
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Metadata_Reference_Information:
Metadata_Date: 20040702
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: North Carolina Center for Geographic Information and Analysis
Contact_Person: REQUIRED: The person responsible for the metadata information.
Contact_Position: Database Management
Contact_Address:
Address_Type: Mailing and physical address
Address:
301 North Wilmington Street, Suite 700
City: Raleigh
State_or_Province: North Carolina
Postal_Code: 27601-2825
Country: USA
Contact_Voice_Telephone: (919) 733-2090
Contact_Facsimile_Telephone: (919) 715-0725
Contact_Electronic_Mail_Address: dataq@cgia.state.nc.us
Hours_of_Service: 8:30AM - 5:30PM
Contact Instructions:
Phone and electronic mail preferred
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Access_Constraints: None
Metadata_Use_Constraints:
This metadata file is to accompany the data set identified and received from NCCGIA. NCCGIA does not support secondary distribution. If this data file was received from anyone besides NCCGIA, this metadata file and the data set it describes may contain discrepancies.
Metadata_Extensions:
Online_Linkage: http://www.esri.com/metadata/esriprof80.html
Profile_Name: ESRI Metadata Profile
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