Sanitary Sewer Systems - Discharges

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Frequently-anticipated questions:

What does this data set describe?

Title: Sanitary Sewer Systems - Discharges
Abstract:
The NCREDC in conjunction with Hobbs, Upchurch & Associates developed the digital Sewer system discharges as mapped by individual system owners as required by contract. The data collected will facilitate planning, siting and impact analysis in the 70 individual counties of North Carolina. This file enables the user to make various county-level determinations when used in conjunction with other data layers. This data contains information on sewage discharges, including: discharge ID, location description, original construction date, and latest renovation date. Other coverages exist with sewer lines and other appurtenances.
Supplemental_Information:
The water and sewer data was collected in multiple phases. There is an associated owner and contact table (wsp2cont.dbf) for the phase 2 counties which include: Beaufort, Bertie, Bladen, Brunswick, Camden, Caswell, Chatham, Chowan, Columbus, Currituck, Dare, Duplin, Franklin, Gates, Granville, Greene, Halifax, Harnett, Hertford, Hoke, Hyde, Iredell, Jones, Lee, Lenoir, Lincoln, Martin, Montgomery, Moore, Northampton, Onslow, Pasquotank, Pender, Perquimans, Pitt, Richmond, Robeson, Sampson, Scotland, Stanly, Union, Vance, Warren, Washington and Wilson counties. 45 counties.

Phase 1 counties included: Alexander, Alleghany, Ashe, Avery, Buncombe, Burke, Caldwell, Cherokee, Clay, Cleveland, Davie, Forsyth, Graham, Haywood, Henderson, Jackson, Macon, Madison, McDowell, Mitchell, Polk, Rutherford, Stokes, Surry, Swain, Transylvania, Watauga, Wilkes, Yadkin, and Yancey counties. 30 counties.

For more information on the water and sewer systems attributes refer to: Geographic Data Content Standard for Water Distribution Systems and Sanitary Sewer Systems, Version 2.2; State of North Carolina; Center for Geographic Information and Analysis; 301 North Wilmington Street; Suite 700; Raleigh, NC 27601-2825; April 1997. This document is available online through the www.cgia.state.nc.us/gicc/index.html Geographic Information North Carolina, Geographic Information Coordinating Council Web Page.

system filename: sdisch approx. filesize = 0.1 mb

Revisions and updates to this layer include:

1.) filename: sdisch698 The June 1998 release was the first

version of the data.

  1. How should this data set be cited?

    NCREDC - N.C. Rural Economic Development Center, 199806, Sanitary Sewer Systems - Discharges: NC Center for Geographic Information & Analysis, Raleigh, North Carolina.

    Online Links:

    Other_Citation_Details: NCCGIA distributes this dataset

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -84.5
    East_Bounding_Coordinate: -75.25
    North_Bounding_Coordinate: 36.75
    South_Bounding_Coordinate: 33.75

  3. What does it look like?

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

    Calendar_Date: 1997
    Currentness_Reference: Data creation date

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

    Geospatial_Data_Presentation_Form: Map

  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):
      • Entity Point (114)

    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: 34.333
      Standard_Parallel: 36.167
      Longitude_of_Central_Meridian: 79.000
      Latitude_of_Projection_Origin: 33.750
      False_Easting: 609601.22
      False_Northing: 0.000

      Planar coordinates are encoded using Coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.1
      Ordinates (y-coordinates) are specified to the nearest 0.1
      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 meters.
      The flattening of the ellipsoid used is 1/298.257.

  7. How does the data set describe geographic features?

    Sewer System - Discharges
    Sewer discharges in 70 rural counties (Source: NC REDC)

    AREA
    Total area in coverage units (Source: software computed)

    Frequency of measurement: None planned

    Range of values
    Minimum:0
    Maximum:0
    Units:meters
    Resolution:.00001

    PERIMETER
    Total perimeter in coverage units (Source: Software computed)

    Frequency of measurement: None planned

    Range of values
    Minimum:0
    Maximum:0
    Units:meters
    Resolution:0.001

    Sstpdcid
    Discharge identification number (Source: WWTP ID + HUA unique ID)

    Frequency of measurement: None planned

    Unique Identification Number

    Ssdcloc
    Area/Location of discharge (Source: By owner and HUA)

    Frequency of measurement: None planned

    Range of values
    Minimum:1903
    Maximum:1996

    Ssdccstr
    original year of construction (Source: By owner and HUA)

    Frequency of measurement: None planned

    Date is variable

    Ssdcrenv
    Latest renovation (Source: By owner and HUA)

    Frequency of measurement: None planned

    Date is variable

    Entity_and_Attribute_Overview:
    A point coverage depicting locations of discharges in 70 rural counties. Fields including discharge id (comprised of WWTP ID+Unique ID), Location name, Original year of construction, latest renovation.

    SDISCH.PAT Point Attribute Table

    COLUMN ITEM NAME WIDTH OUTPUT TYPE DEC DESCRIPTION

    1 AREA 4 12 F 3 Calculated Area

    5 PERIMETER 4 12 F 3 Calculated Perimeter

    9 SDISCH# 4 5 B - Coverage ID

    13 SDISCH-ID 4 5 B - User defined ID

    17 SSTPDCID 10 10 C - Discharge ID

    27 SSDCLOC 30 30 C - Location description

    57 SSDCCSTR 4 4 B - Original year of construction

    61 SSDCRENV 4 4 B - Latest renovation

    WSP2CONT.DBF Contact and Owner attribute table.

    COLUMN ITEM NAME WIDTH OUTPUT TYPE DEC DESCRIPTION

    1 COUNTY 3 3 C - County FIPS Code

    4 FEATID 13 13 C - Feature ID for linking tables

    17 SYSID 7 7 C - System Id number

    24 OWNERID 5 5 C - HUA defined ID Number

    29 OWNAME 50 50 C - Owner name

    79 CONTACT 48 48 C - Contact name

    127 PHONE 11 11 C - Contact phone number

    138 DATA 103 103 C - Type of information collected

    241 CITY 19 19 C - Contact city

    260 ST 4 4 C - Contact state

    264 ZIP 6 6 C - Contact zip code

    270 ENGINEER_N 40 40 C - Name of HUA engineer

    310 ENG_PHONE 12 12 C - HUA engineer phone number

    HUA is Hobbs, Upchurch & Associates

    This table can be used by performing a join with the fields FeatID and The feature ID field with any one of the themes (ie: Discharges, Wsysa, Etc.) The information in this table will tell who HUA contacted and the types of data received from that person or system.

    Entity_and_Attribute_Detail_Citation:

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?

    North Carolina Rural Economic Development Center

    Hobbs, Upchurch & Associates

    Participating Counties

    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

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

    NCREDC
    4021 Carya Drive
    Raleigh, North Carolina 27601
    U.S.A.

    (919) 250-4314 (voice)
    (919)250-4325 (FAX)
    CHBOCK@MINDSPRING.COM

    Hours_of_Service: 8am to 5pm
    Contact_Instructions: Phone and electronic mail preferred

Why was the data set created?

This data was created to assist governmental agencies and others in making resource management decisions through use of a Geographic Information System (GIS).

How was the data set created?

  1. From what previous works were the data drawn?

    None (source 1 of 1)
    System Owners and Hobbs, Upchurch, Unknown, Owner supplied system information: Varies, Varies.

    Other_Citation_Details:
    The source information and material dates vary by system. An associated "Owner and Contact Table" contains specific information on source materials supplied.
    Type_of_Source_Media: Varies
    Source_Contribution: Owner supplied information on discharges.

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

    Date: 1997 (process 1 of 3)
    Intake locations were heads-up digitized onto state supplied base mapping.

    Person who carried out this activity:

    NCEDC
    4021 Carya Drive
    Raleigh, North Carolina 27601
    U.S.A.

    (919) 250-4314 (voice)
    (919)250-4325 (FAX)
    Chbock@Mindspring.com

    Hours_of_Service: 8:00AM - 5:00PM
    Contact_Instructions: Phone and electronic mail preferred
    Date: 1990 (process 2 of 3)
    Hobbs, Upchurch & Associates digitized/compiled maps supplied by the participating counties. Also all tabular data was input into the CGIA supplied data standard. All heads-up digitizing was performed in AutoCAD R12-14/ArcCAD with NC DOT supplied road centerlines and hydro. Digital files were then converted into ArcView 3.0 Shape files with the appropriate dBase information. The data was completed in NAD83 Meters.

    Person who carried out this activity:

    NCREDC
    NA
    4021 Carya Drive
    Raleigh, North Carolina 27601
    U.S.A.

    (910) 250-4314 (voice)
    (910) 250-4325 (FAX)
    Chbock@Mindspring.com

    Hours_of_Service: 8:00AM - 5:00PM
    Contact_Instructions: Phone and electronic mail preferred
    Date: Feb-1998 (process 3 of 3)
    Sewer intake files by county were mappjoined into one statewide GIS coverage using ARC/INFO GIS software. On-screen review of the data and attributes was performed by a GIS analyst to make sure the processing did not change the data. The draft metadata supplied by Hobbs, Upchurch and Associates was finalized for inclusion into the Corporate Geographic Database. An additional table containing source data contact and system owner information was created by HUA and has been incorporated into the data available through CGIA.

    Person who carried out this activity:

    NC Center for Geographic Information and Analysis
    c/o David Giordano
    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: 8:00AM - 5:00PM
    Contact_Instructions: Phone and electronic mail preferred
  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?

    Hobbs, Upchurch & Associates digitized locations from various maps and GPS location points. All tabular data was supplied by the owner or received by Public Sewer Supply information. For more information on data sources and contacts, see the "Owner and Contact Table".

  2. How accurate are the geographic locations?

    Sewer discharges were heads-up digitized to match with the state supplied base mapping. In some cases GPS location was used. The overall threshold however is 40 feet or less. For more information on data sources and contacts, see the "Owner and Contact Table".

  3. How accurate are the heights or depths?

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

    This data layer represents the sewer intake locations and tabular data supplied by the owner of each system. For more information on data sources and contacts, see the "Owner and Contact Table".

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

    Using ESRI's ArcCAD GIS software, the data set was built for nodal topology using the "build" command. Topology has not been edited since the last build or clean.

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 form this data set should cite the following: The source of the Sewer Systems - Discharges data is the North Carolina Corporate Geographic Database. Earlier versions of this data set 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?

    Sanitary Sewer Systems - Discharges

  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: 17-Aug-2000
Metadata author:
North Carolina Center for Geographic Information and Analysis
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)

Generated by mp version 2.8.11 on Thu Apr 15 11:07:33 2004