Roads

Frequently-anticipated questions:

What does this data set describe?

Title: Roads
Abstract: E911 road centerline locations.
  1. How should this data set be cited?

    Inc, WorldView Solutions , October 2006, Roads.

    Online Links:

    • \\wvs1\Clients\Accomack\Current\Data\AccomackGIS_old.gdb

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -76.010238
    East_Bounding_Coordinate: -75.325143
    North_Bounding_Coordinate: 38.032566
    South_Bounding_Coordinate: 37.463534

  3. What does it look like?

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

    Calendar_Date: March 2002
    Currentness_Reference: ground condition

  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?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • String (5480)

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

      The map projection used is Lambert Conformal Conic.

      Projection parameters:
      Standard_Parallel: 36.766667
      Standard_Parallel: 37.966667
      Longitude_of_Central_Meridian: -78.500000
      Latitude_of_Projection_Origin: 36.333333
      False_Easting: 11482916.666667
      False_Northing: 3280833.333333

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.000312
      Ordinates (y-coordinates) are specified to the nearest 0.000312
      Planar coordinates are specified in survey feet

      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: 0.000003
      Altitude_Encoding_Method:
      Explicit elevation coordinate included with horizontal coordinates

  7. How does the data set describe geographic features?

    Roads

    OBJECTID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    V_LEID

    LGID2

    V_VFIPSID

    V_GEDGEID

    V_FRNODID

    V_TONODID

    V_LEDGEID

    V_LOCALID

    V_FIPS

    V_SOURCE

    V_FROMX

    V_FROMY

    V_TOX

    V_TOY

    V_NODSORC

    V_FJUN

    V_TJUN

    V_FCC

    V_ENABLED

    V_CHGCODE

    V_CHGDATE

    V_FLAG

    V_ORGNAM

    V_PREDIR

    V_STNAME

    V_STSFFX

    V_POSDIR

    V_FRADDL

    V_TOADDL

    V_FRADDR

    V_TOADDR

    V_SLENCHG

    AdressQA

    ADDMINUS_FLAG

    V_GEOCODE_ID

    V_UCHGBY

    V_UCHGDT

    V_UCODE

    V_UUID

    V_USTATUS

    V_USOURCE

    ERCODE_1

    ERCODE_2

    ERCODE_3

    ERCODE_100

    ROAD_KEY

    ROADNAME

    ROUTE

    ST_PRE

    ST_NAME

    ST_SUR

    ST_POST

    COMMUNITY

    EVENSIDE

    INCREMENT

    FLAG

    LOW

    HIGH

    FROMNODE

    TONODE

    LAYER

    COUNTY_ID

    UPDATE_

    STATE_ID

    Shape_Length
    Length of feature in internal units. (Source: ESRI)

    Positive real numbers that are automatically generated.

    SHAPE
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    SHAPE_Length
    Length of feature in internal units. (Source: ESRI)

    Positive real numbers that are automatically generated.

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?

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

    Tom Brockenbrough
    Accomack County Department of Planning
    GIS Coordinator
    23282 Courthouse Avenue
    Accomac, VA 23301
    USA

    757.787.5797 (voice)
    757.789.3116 (FAX)
    tbrockenbrough@co.accomack.va.us

    Hours_of_Service: 9am - 5pm, M-F

Why was the data set created?

The state RCL project is focused on creating a single, consistent, statewide digital road (vehicular) centerline file and leverages our investment in the VBMP digital orthophotography. The County has added value to this data since the initial delivery by VGIN in 2005.

How was the data set created?

  1. From what previous works were the data drawn?

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

    (process 1 of 3)
    VGIN collected all paved and unpaved roads that are intended for use by motorized vehicles and are clearly identifiable on the VBMP orthophotography. This includedall trails, identifiable driveways 200 feet or longer, and divided highway crossovers. The end product was a seamless across jurisdictional boundaries and across the state. Directionality and other key information will be contained in the associated database.

    (process 2 of 3)
    WorldView field verified road locations, directionality, address ranges, names, route numbers and other data related to the roads.

    (process 3 of 3)
    Dataset copied.

    Data sources used in this process:

    • \\WVS1\Clients\Accomack\Current\Data\Transportation.mdb

  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?

  2. How accurate are the geographic locations?

  3. How accurate are the heights or depths?

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

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

How can someone get a copy of the data set?

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

Access_Constraints:
Access is granted on a case-by-case basis by the Accomack County Department of Planning.
Use_Constraints:
Data is for planning purposes only - data should not be used without the express permission of the Accomack County Department of Planning.

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

    Accomack County Department of Planning
    c/o Tom Brockenbrough
    GIS Coordinator
    23282 Courthouse Avenue
    Accomac, VA 23301
    USA

    757.787.5797 (voice)
    757.789.3116 (FAX)
    tbrockenbrough@co.accomack.va.us

    Contact_Instructions:
  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 04-Apr-2007
Metadata author:
Accomack County Department of Planning
c/o Tom Brockenbrough
GIS Coordinator
23282 Courthouse Avenue
Accomac, VA 23301
USA

757-787-5797 (voice)
757.789.3116 (FAX)
tbrockenbrough@co.accomack.va.us

Contact_Instructions:
tbrockenbrough@co.accomack.va.us Tom Brockenbrough

GIS Coordinator

Accomack County Department of Planning

P.O. Box 686

23282 Courthouse Avenue

Accomac, VA 23301

757.787.5797

fax

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.8.6 on Wed Apr 04 10:04:59 2007