NC OneMap AboutHelp
Launch Map Viewer
HomeSearch BrowseDownload Imagery
Details

.

Bridge Structure Locations, 4th Quarter 2017 - NC Department of Transportation


Download Link: https://connect.ncdot.gov/resources/gis/Pages/GIS-Data-Layers.aspx
Abstract: Point file representing North Carolina bridges and other structures, extracted and attributed by the NCDOT Bridge Maintenance Unit's bridge database.
Purpose: Provide all currently-inventoried NC bridge structures in one consistent format for query and display.
Supplemental Information: *****This bridge layer contains many kinds of structures currently maintained by the Bridge Maintenance Unit (BMU) of the NCDOT. They reflect an ongoing attempt by the NCDOT GIS Unit to portray the traffic-carrying structures found in the NCDOT BMU's Bridge Database and shown in the GIS Bridge layer in as timely a manner as possible. Until such time as the GIS Unit can approximate the maintenance schedule of the BMU, the GIS layer may not accurately reflect the structures currently in service or the additions and deletions to the Bridge Inventory system which are performed on a daily basis by the BMU.***** Recent attribute changes: All TIER-related fields were removed for the 1st Quarter 2016 release. TIER values are no longer being utilized or maintained by the NCDOT. Sign structures have been included in the data release for 1st Quarter 2016. These structures include Overhead, Cantilever and T-Pole signs. Points for Cantilever and T-Pole signs are snapped to the route closest to the main pole of the sign. Points for Overhead signs are snapped to the inventory direction of the route passing under the sign. 2 new fields were added for the 1st Qtr 2015 release: - GOOGLE_LINK - this field contains a hyperlink that will spawn a Google map location centered on the selected structure. Users should select the lightning-bolt shaped "Hyperlink" tool in ArcMap in order to utilize this field. SDV users can do an "Identify" on the structure, followed by a click on this hyperlink field to create a Google map. - MAINT_RESP - this is a new field indicating the agency with maintenance responsibility for the structure and can be used to indicate the difference between city or state maintenance for a structure. The main code indicating state maintenance is "01," while the main code for city maintenance is "04," although there are other codes for both. Please see the metadata entry for this field for a list of current enumerated codes and associated agencies. Following the introduction of the new MAINT_RESP field, structures have been renamed to remove the "CITY" designation in the BRDG_TYP_NM field. Users can now distinguish city types by using MAINT_RESP code described above. BRDG_TYP_NM will now only contain the name of the structure type and no information concerning maintenance responsibility. Please refer to the Attribute section of this metadata for more information on the new attributes, as well as descriptions of some of the values. Older attribute changes: Item names for 4 of the fields in the shapefile and derived tables have changed to match the item names found in the map services. The names changed are: BRIDGE_NUM changed to BRDG_NBR; TYPE changed to BRDG_TYP_NM, which will be truncated in the shapefile to BRDG_TYP_N; BSIP_BNUM changed to BSIP_BRDG_NUM, which will be truncated in the shapefile to BSIP_BRDG_; ServiceOn has been capitalized to SERVICEON. Many fields were previously added to the bridge layer for customer use. These include: Coordinate information fields - X,Y coordinates in NAD 83 Stateplane Feet have been added, along with latitude/longitude coordinates in Geographic Decimal Degrees. Route-milepost information has also been included. Please note the milepost value is derived from the RTE_ID field - this 10-digit field is a concatenation of the 8-digit ROUTE number and the 2-digit county number and there are a small number of instances across the state where the county number may differ from the COUNTY name carried by the BMU Bridge Database. These are usually cases of structures on or very near a county line and the structure's location along a route may differ from the county assigned by the bridge database. Many fields from the bridge database have been added to make the shapefile (downloadable from the GIS Unit's Data Distribution page) the equivalent of the bridge map service found in the Spatial Data Viewer (SDV). These include functional class designations, sufficiency ratings, and posted weight values. Added TYPEs include PAVEMENT ON PILES. FEDERAL BRIDGE replaces "Gov't Bridge;" FERRY RAMP replaces "Ferry;" and all TYPE values are now capitalized. The Verification field was dropped. All structure points have been compared to the latest imagery available at the time of review and visually verified except for the newest structures under construction which don't appear yet in any imagery. These structures can't be verified until the imagery and linework have been updated. The GIS Unit does NOT guarantee accurate placement of the structure points, but does try to use all available information at the time of review to accomplish it. RD_ANGLE and STR_ANGLE were added to the layer. RD_ANGLE is the tangent angle of the road closest to the structure point. The STR_ANGLE is the angle of the structure relative to the road at that same point. Many structure types will parallel the road ( these structures can be found by selecting for "RD_ANGLE = STR_ANGLE"). Other structure types may cross the road perpendicularly (culverts, pipes, railroads, and walkways). Most of these are calculated to be 90-degrees off the RD_ANGLE value, although some may have values assigned manually during spatial reviews. The STR_ANGLE can be used to assign angled symbols for structure display on maps - be aware, however, that many symbols may need to have their default angles adjusted in their layer's Properties before the value stored in STR_ANGLE can display the symbol accurately.
Publication Date: 20171113
Originator: Cary Clemmons, North Carolina Department of Transportation Bridge Maintenance Unit
Time Period of Content:
Time Period Information:
Single Date/Time:
Calendar Date: 20171113
Currentness Reference: publication date
Status:
Progress: Complete
Maintenance and Update Frequency: Quarterly
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -84.402344
East Bounding Coordinate: -75.423872
North Bounding Coordinate: 36.614196
South Bounding Coordinate: 33.769569
Contact Organization: NCDOT GIS Unit
Contact Person: GIS Help Desk
Contact Electronic Mail Address: gishelp@ncdot.gov
Contact Voice Telephone: 919.707.2165
Contact Organization: NCDOT GIS Unit
Horizontal Datum Name: D North American 1983
Planar Distance Units: foot_us
Ellipsoid Name: GRS 1980
Map Projection Name: NAD 1983 StatePlane North Carolina FIPS 3200 Feet
Attribute:
Attribute Label: ROUTE
Attribute Definition: 8-digit route number on which structure is located; may be empty for non-verified bridges
Attribute Definition Source: NCDOT GIS Unit
Attribute:
Attribute Label: BRDG_NBR
Attribute Definition: 2-digit county number + 4-digit bridge number
Attribute Definition Source: NCDOT Structures Management Unit
Attribute:
Attribute Label: Shape
Attribute Definition: Feature geometry.
Attribute Definition Source: ESRI
Attribute Domain Values:
Unrepresentable Domain: Coordinates defining the features.
Attribute:
Attribute Label: COUNTY
Attribute Definition: County name
Attribute Definition Source: NCDOT Structures Management Unit
Attribute:
Attribute Label: F_CARRIED
Attribute Definition: Facility carried by the structure - highways, railroads, etc
Attribute Definition Source: NCDOT Structures Management Unit
Attribute:
Attribute Label: BRDG_TYP_NM
Attribute Definition: Structure type
Attribute Definition Source: NCDOT Structures Management Unit
Attribute:
Attribute Label: FTR_INTRSC
Attribute Definition: Feature intersected by the structure - streams, river, highways, etc
Attribute Definition Source: NCDOT Structures Management Unit
Attribute:
Attribute Label: DIVISION
Attribute Definition: Division number
Attribute Definition Source: NCDOT Structures Management Unit
Attribute:
Attribute Label: STRUCT_DEF
Attribute Definition: Structural deficiency
Attribute Definition Source: NCDOT Structures Management Unit
Attribute:
Attribute Label: FUNC_OBSOL
Attribute Definition: Functional obsolescence
Attribute Definition Source: NCDOT Structures Management Unit
Attribute:
Attribute Label: SUFFRATING
Attribute Definition: Sufficiency rating
Attribute Definition Source: NCDOT Structures Management Unit
Attribute:
Attribute Label: NHS
Attribute Definition: National Highway System
Attribute Definition Source: NCDOT Structures Management Unit
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: 0
Enumerated Domain Value Definition: Inventory Route is not on the NHS
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 1
Enumerated Domain Value Definition: Inventory Route is on the NHS
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Attribute:
Attribute Label: DEF_NETWRK
Attribute Definition: Defense network
Attribute Definition Source: NCDOT Structures Management Unit
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: 0
Enumerated Domain Value Definition: The inventory route is not a STRAHNET route
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 1
Enumerated Domain Value Definition: The inventory route is on an Interstate STRAHNET route
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 2
Enumerated Domain Value Definition: The inventory route is on a Non-Interstate STRAHNET route
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 3
Enumerated Domain Value Definition: The inventory route is on a STRAHNET connector route
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Attribute:
Attribute Label: DETOUR_LEN
Attribute Definition: Detour length
Attribute Definition Source: NCDOT Structures Management Unit
Attribute:
Attribute Label: FUNC_CLASS
Attribute Definition: Functional class
Attribute Definition Source: NCDOT Structures Management Unit
Attribute:
Attribute Label: POSTED_SV
Attribute Definition: Posted weight limit, single vehicle
Attribute Definition Source: NCDOT Structures Management Unit
Attribute:
Attribute Label: NATTRUCNET
Attribute Definition: National truck network
Attribute Definition Source: NCDOT Structures Management Unit
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: 0
Enumerated Domain Value Definition: The inventory route is not part of the national network for trucks
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 1
Enumerated Domain Value Definition: The inventory route is part of national network for trucks
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Attribute:
Attribute Label: STRTYPMAIN
Attribute Definition: Structure type main
Attribute Definition Source: NCDOT Structures Management Unit
Attribute:
Attribute Label: SUPERSTRUC
Attribute Definition: Superstructure
Attribute Definition Source: NCDOT Structures Management Unit
Attribute:
Attribute Label: BSIP_BRDG_NBR
Attribute Definition: 3-digit county number + 4-digit bridge number
Attribute Definition Source: NCDOT GIS Unit
Attribute:
Attribute Label: X_COORD
Attribute Definition: Calculated X coordinate in NAD83 Stateplane Feet
Attribute Definition Source: NCDOT GIS Unit
Attribute:
Attribute Label: Y_COORD
Attribute Definition: Calculated Y coordinate in NAD83 Stateplane Feet
Attribute Definition Source: NCDOT GIS Unit
Attribute:
Attribute Label: LONG_DD
Attribute Definition: Calculated Longitude value in Geographic decimal degrees
Attribute Definition Source: NCDOT GIS Unit
Attribute:
Attribute Label: SUBSTRUCTU
Attribute Definition: Substructure
Attribute Definition Source: NCDOT Structures Management Unit
Attribute:
Attribute Label: LAT_DD
Attribute Definition: Calculated Latitude value in Geographic decimal degrees
Attribute Definition Source: NCDOT GIS Unit
Attribute:
Attribute Label: OBJECTID
Attribute Definition: Internal feature number.
Attribute Definition Source: ESRI
Attribute Domain Values:
Unrepresentable Domain: Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute Label: ServiceOn
Attribute Definition: The type of service offered by the bridge, used in determining traffic-carrying structures (codes 1, 4, 5, 6, 7, 8 carry traffic)
Attribute Definition Source: NCDOT Structures Management Unit
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: 1
Enumerated Domain Value Definition: Highway
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 2
Enumerated Domain Value Definition: Railroad
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 3
Enumerated Domain Value Definition: Pedestrian-bicycle
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 4
Enumerated Domain Value Definition: Highway-railroad
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 5
Enumerated Domain Value Definition: Highway-pedestrian
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 6
Enumerated Domain Value Definition: Overpass structure at an interchange or second level of a multilevel interchange
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 7
Enumerated Domain Value Definition: Third level (Interchange)
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 8
Enumerated Domain Value Definition: Fourth level (Interchange)
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 9
Enumerated Domain Value Definition: Building or plaza
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 0
Enumerated Domain Value Definition: Other
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Attribute:
Attribute Label: RTE_ID
Attribute Definition: 11-digit route & county number, used for routing purposes
Attribute Definition Source: NCDOT GIS Unit
Attribute:
Attribute Label: POSTED_TTST
Attribute Definition: Posted weight limit, tractor trailer, semi-truck
Attribute Definition Source: NCDOT Structures Management Unit
Attribute:
Attribute Label: RD_ANGLE
Attribute Definition: Calculated angle of the road at the point closest to the structure (the tangent angle).
Attribute Definition Source: NCDOT GIS Unit
Attribute:
Attribute Label: STR_ANGLE
Attribute Definition: Calculated angle of the structure relative to the road; many types will parallel the road (RD_ANGLE = STR_ANGLE), others may cross the road perpendicularly (culverts, pipes, railroads, and walkways). Most of the perpendicular structures are calculated to be 90-degrees off the RD_ANGLE value.
Attribute Definition Source: NCDOT GIS Unit
Attribute:
Attribute Label: MP
Attribute Definition: Milepost of the structure along the indicated ROUTE
Attribute Definition Source: NCDOT GIS Unit
Attribute:
Attribute Label: GOOGLE_LINK
Attribute Definition: Hyperlink to Google Maps showing structure selected; calculated from the LAT_DD and LONG_DD fields
Attribute Definition Source: NCDOT GIS Unit
Attribute:
Attribute Label: MAINT_RESP
Attribute Definition: The actual name(s) of the agency(s) responsible for the maintenance of the structure. Values enumerated below are for the currently-existing codes in the database, as of 1st Qtr 2015
Attribute Definition Source: NCDOT Structures Management Unit
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: 01
Enumerated Domain Value Definition: State Highway Agency
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 04
Enumerated Domain Value Definition: City or Municipal Highway Agency
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 11
Enumerated Domain Value Definition: State Park, Forest, or Reservation Agency
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 21
Enumerated Domain Value Definition: Other State Agencies
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 25
Enumerated Domain Value Definition: Other Local Agencies
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 26
Enumerated Domain Value Definition: Private (other than railroad)
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 27
Enumerated Domain Value Definition: Railroad
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 31
Enumerated Domain Value Definition: State Toll Authority
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 60
Enumerated Domain Value Definition: Other Federal Agencies (not listed below)
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 66
Enumerated Domain Value Definition: National Park Service
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Enumerated Domain:
Enumerated Domain Value: 70
Enumerated Domain Value Definition: Corps of Engineers (Civil)
Enumerated Domain Value Definition Source: NCDOT Structures Management Unit
Distribution Liability: The availability and accuracy of the bridge dataset is dependent upon an ongoing process of integration between the NCDOT GIS Unit and the Bridge Maintenance Unit's bridge database. Discrepancies may exist since the frequency with which the sources are updated is not the same among the different groups. Please take this into account prior to utilizing the GIS bridge layer.
/geoportal/rest/document?f=html&id=%7B969E7F38-5B8C-44B0-ACDC-EB4095F44267%7D
:: NC OneMap GeoSpatial Portal - Geographic Data Serving a Statewide Community ::


Please read the Disclaimer and Privacy or Contact Us.