onemap_prod.SDEADMIN.mtt

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Frequently-anticipated questions:

What does this data set describe?

Title: onemap_prod.SDEADMIN.mtt
Abstract:
The US Geological Survey-National Mapping Division created the 1:24,000-scale Pipe and Transmission data for their published maps. The NC Center for Geographic Information and Analysis, developed the NC statewide Transportation- Miscellaneous (1:24,000) digital data as a base layer showing pipe and transmission lines. This data was compiled directly from the DLGs. Apparent inconsistencies in specific areas may be due to different compliation dates of the source maps. Airports and landing strips have been removed and are stored in another file.
Supplemental_Information:
Refer to "USGS Digital Cartographic Data Standards," circular 895-G for USGS Coding Classification.
system filename: mtt24 approx. file size = 0.9 mb
Revisions and updates to this layer include: 
1.) filename: mtt24_1298 This data was previously stored in
24 k quadrangle files.  CGIA combined the available 24 k
files for North Carolina to enable easier use and distribution
of this information. This was the first release of this data in
a statewide format.
  1. How should this data set be cited?

    US Geological Survey-National Mapping Division, 199812, onemap_prod.SDEADMIN.mtt: US Geological Survey-National Mapping Division, Reston, Virginia.

    Online Links:

    Other_Citation_Details: NCCGIA distributes this dataset

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -84.478914
    East_Bounding_Coordinate: -75.419213
    North_Bounding_Coordinate: 36.656208
    South_Bounding_Coordinate: 33.828419

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Calendar_Date: REQUIRED: The year (and optionally month, or month and day) for which the data set corresponds to the ground.
    Currentness_Reference: Source map dates

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: vector digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      Indirect_Spatial_Reference: None
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • String (4517)
      • Node, planar graph (3739)

    2. What coordinate system is used to represent geographic features?

      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 coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.002048
      Ordinates (y-coordinates) are specified to the nearest 0.002048
      Planar coordinates are specified in meters

      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.

      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Resolution: 1.000000
      Altitude_Encoding_Method:
      Explicit elevation coordinate included with horizontal coordinates

  7. How does the data set describe geographic features?

    onemap_prod.SDEADMIN.mtt
    Pipelines, powerlines, and other miscellaneous transmission features (Source: USGS - National Mapping Division)

    MINOR2
    USGS Digital Line Graph code (Source: US Geological Survey)

    Frequency of measurement: None planned

    Formal codeset
    Codeset Name:USGS Digital Cartographic Data Standards, circular 895-G
    Codeset Source:US Geological Survey

    TNODE_

    LENGTH
    Length of arc in coverage units (Source: Software computed)

    Frequency of measurement: As needed

    Range of values
    Minimum:1.828
    Maximum:16,567.870
    Units:meters
    Resolution:0.001

    MAJOR1
    USGS Digital Line Graph code (Source: US Geological Survey)

    Frequency of measurement: None planned

    Formal codeset
    Codeset Name:USGS Digital Cartographic Data Standards, circular 895-G
    Codeset Source:US Geological Survey

    MAJOR2
    USGS Digital Line Graph code (Source: US Geological Survey)

    Frequency of measurement: None planned

    Formal codeset
    Codeset Name:USGS Digital Cartographic Data Standards, circular 895-G
    Codeset Source:US Geological Survey

    MAJOR3
    USGS Digital Line Graph code (Source: US Geological Survey)

    Frequency of measurement: None planned

    Formal codeset
    Codeset Name:USGS Digital Cartographic Data Standards, circular 895-G
    Codeset Source:US Geological Survey

    MAJOR4
    USGS Digital Line Graph code (Source: US Geological Survey)

    Frequency of measurement: None planned

    Formal codeset
    Codeset Name:USGS Digital Cartographic Data Standards, circular 895-G
    Codeset Source:US Geological Survey

    OBJECTID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    FNODE_

    MINOR3
    USGS Digital Line Graph code (Source: US Geological Survey)

    Frequency of measurement: None planned

    Formal codeset
    Codeset Name:USGS Digital Cartographic Data Standards, circular 895-G
    Codeset Source:US Geological Survey

    LPOLY_

    MINOR4
    USGS Digital Line Graph code (Source: US Geological Survey)

    Frequency of measurement: None planned

    Formal codeset
    Codeset Name:USGS Digital Cartographic Data Standards, circular 895-G
    Codeset Source:US Geological Survey

    RPOLY_

    MINOR1
    USGS Digital Line Graph code (Source: US Geological Survey)

    Frequency of measurement: None planned

    Formal codeset
    Codeset Name:USGS Digital Cartographic Data Standards, circular 895-G
    Codeset Source:US Geological Survey

    MTT24_

    MTT24_ID

    SYMBOL

    SHAPE
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    SHAPE.len

    Entity_and_Attribute_Overview:
    An arc coverage depicting the locations of miscellaneous transportation features, such as pipe and transmission lines, as delineated by the US Geological Survey. The arc attribute table (AAT) has attribute data including to- and from-node identifiers, left- and right-side polygon identifiers, length of linear feature in feet, and two internal identification numbers. There are six additional items, which describe the features, according to USGS Digital Line Graph codes. 
    MTT24.AAT  Arc Attribute Table
COLUMN  ITEM NAME   WIDTH OUTPUT TYPE  DEC  DESCRIPTION
1       FNODE#        4      5    B     -   From-node id of linear feature
5       TNODE#        4      5    B     -   To-node id of linear feature
9       LPOLY#        4      5    B     -   Left-side polygon id of linear
feature
13      RPOLY#        4      5    B     -   Right-side polygon id of
linear feature
17      LENGTH        4     12    F     3   Length of linear feature in
feet
21      MTT24#        4      5    B     -   Internal id number
25      MTT24-ID      4      5    B     -   Internal id number
29      MAJOR1        6      6    I     -   USGS Digital Line Graph code
35      MINOR1        6      6    I     -   USGS Digital Line Graph code
41      MAJOR2        6      6    I     -   USGS Digital Line Graph code
47      MINOR2        6      6    I     -   USGS Digital Line Graph code
53      MAJOR3        6      6    I     -   USGS Digital Line Graph code
59      MINOR3        6      6    I     -   USGS Digital Line Graph code
65      MAJOR4        6      6    I     -   USGS Digital Line Graph code
71      MINOR4        6      6    I     -   USGS Digital Line Graph code
77      SYMBOL        2      2    I     -   Internal plotting code
    Entity_and_Attribute_Detail_Citation:
    Refer to USGS Digital Cartographic Data Standards, circular 895-G for descriptions of the DLG major/minor codes.

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    USGS, National Mapping Division

NCCGIA Director, Karen Siderelis
Database Administration, Zsolt Nagy
Database Management, Ken Shaffer
Project Manager, Tim Johnson
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

  3. To whom should users address questions about the data?

    NC Center for Geographic Information and Analysis
    301 North Wilmington Street, Suite 700
    Raleigh, North Carolina 27601-2825
    U.S.A.

    (919)733-2090 (voice)
    (919)715-0725 (FAX)
    dataq@cgia.state.nc.us

    Hours_of_Service: 8:30am to 5:30pm
    Contact_Instructions: Preferred contact is by email

Why was the data set created?

DLG's 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. NC CGIA digitizes and distributes dlgs to help agencies and others make resource management and other types of decisions.

How was the data set created?

  1. From what previous works were the data drawn?

    None (source 1 of 1)
    Survey, US Geological , Unknown, Digital Line Graphs: US Geological Survey, Reston, Virginia.

    Other_Citation_Details: USGS 1:24,000-scale DLG Program
    Type_of_Source_Media: Paper
    Source_Scale_Denominator: 100000
    Source_Contribution: Digital Line Graphs

  2. How were the data generated, processed, and modified?

    Date: 1998 (process 1 of 3)
    1:24,000-scale digital line graph files were mapjoined to form a statewide file for North Carolina representing the Miscellaneous Transmission attributes as shown on the published USGS maps.

    Person who carried out this activity:

    NCCGIA
    GIS Analyst
    301 North Wilmington Street, Suite 700
    Raleigh, North Carolina 27601-2825
    U.S.A.

    (919) 733-2090 (voice)
    (919)715-0725 (FAX)
    dataq@cgia.state.nc.us

    Hours_of_Service: 8:30AM - 5:30PM
    Contact_Instructions: Phone and electronic mail preferred
    (process 2 of 3)
    Metadata imported.

    Data sources used in this process:

    • C:\DOCUME~1\david\LOCALS~1\Temp\xml12.tmp

    (process 3 of 3)
    Dataset copied.

    Data sources used in this process:

    • Server=cgiatdb; Service=5151; Database=onemap_test; User=sdeadmin; Version=sde.DEFAULT

  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    The digital line graphs (DLGs)for miscellaneous transportation were delineated on USGS 1:24,000-scale topographic maps and attributed with USGS DLG codes. The digital files were supplied to NCCGIA who makes attribute edits as errors are found.

  2. How accurate are the geographic locations?

    Miscellaneous transportation features were delineated on USGS 7.5 Minute series topographic maps, which meet National Map Accuracy Standards. The DLGs were digitized and checked for positional accuracy at the USGS. These files, which originally met the National Map Accuracy Standards for 1:24,000-scale dlgs, have had minor edits performed as missing features have been added.

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    These data represent miscellaneous transportation features, including pipe and transmission lines, as determined by the US Geological Survey 1:24,000-scale Digital Line Graph program, for statewide North Carolina. Each feature is attributed with various DLG codes.

  5. How consistent are the relationships among the observations, including topology?

    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.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: None
Use_Constraints:
Acknowledgement of products derived from this data set should cite the following: The source of the Transportation-Miscellaneous (1:24,000) 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.

  1. Who distributes the data set? (Distributor 1 of 1)

    NC Center for Geographic Information and Analysis
    Production Services
    301 North Wilmington Street, Suite 700
    Raleigh, North Carolina 27601-2825
    USA

    (919) 733-2090 (voice)
    (919) 715-0725 (FAX)
    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>
  2. What's the catalog number I need to order this data set?

    Transportation-Miscellaneous (1:24,000)

  3. What legal disclaimers am I supposed to read?

    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.

  4. How can I download or order the data?

  5. Is there some other way to get the data?

    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.

  6. What hardware or software do I need in order to use the data set?

    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>

Who wrote the metadata?

Dates:
Last modified: 02-Oct-2006
Metadata author:
North Carolina Center for Geographic Information and Analysis
c/o REQUIRED: The person responsible for the metadata information.
Database Management
301 North Wilmington Street, Suite 700
Raleigh, North Carolina 27601-2825
USA

(919) 733-2090 (voice)
(919) 715-0725 (FAX)
dataq@cgia.state.nc.us

Hours_of_Service: 8:30AM - 5:30PM
Contact_Instructions: Phone and electronic mail preferred
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.9.5 on Wed Aug 27 10:31:05 2008