Electric Transmission Lines - California Energy Commission [ds1198]

SDE Feature Class

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Tags
Electric Transmission Line, Imperial Irrigation District, Los Angeles Department of Water and Power, PacifiCorp, Pacific Gas and Electric Company, Southern California Edison, San Diego Gas & Electric, Sacramento Municipal Utility District, Western Area Power Administration


Summary

The California Energy Commission (CEC) Electric Transmission Line geospatial data layer has been created to display the electric transmission grid in California. When used in association with the CEC Power Plant and CEC Electric Substation geospatial data layers, viewers can analyze the geographic relationships with the electric transmision grids across utilities, counties and state. The transmission line data, as one of the CECs critical infrastructure spatial data will be used to: 1. Support the CEC/STEP/Strategic Transmission Planning and Corridor Designation Office in corrdior study and transmission line siting; 2. Support the CEC staffs various analysis by providing general geographic reference information; 3. Enhance communication between and among government agencies on emergecy management, resource management, economic development, and environmental study; 4. Provide illustration of critical infrastructure spatial data to the public or other agencies in hardcopy format.

Description

The CEC Transmission Lines geospatial data layer contains electric power lines of transmission and some distribution or sub-transmission voltages covering California. Transmission lines can carry alternating current or direct current with voltages typically ranging from 110 kV to 765 kV. Transmission lines can be overhead and underground; underground transmission lines are more often found in urban areas. Sub-transmission lines generally carry voltages ranging from 33 kV to 100kV. These sub-transmission lines transmit power from higher voltage lines or other bulk power sources to local distribution network substations. An overhead power line can be single or double circuit. A single-circuit transmission line carries conductors for only one circuit. For a three-phase system, this implies that each tower supports three conductors. A double-circuit transmission line has two circuits. For three-phase systems, each tower supports and insulates six conductors. Single phase AC-power lines as used for traction current have four conductors for two circuits. Usually both circuits operate at the same voltage. In HVDC systems typically two conductors are carried per line, but in rare cases only one pole of the system is carried on a set of towers. The detailed descriptions on the structure type, material and circuit can be found at here. If you cannot access to the PDF, you may request us to send you a copy of the PDF.The transmission line, substation and power plant mapping database were started in 1990 by the CEC GIS staffs. The final project was completed in October 2010. The enterprise GIS system on CEC's critical infrastructure database was leaded by GIS Unit in November 2014 and was implemented in May 2016. The data was derived from utility companies and USGS topographic map. Some of the data was rectified from GE and Platts transmission line geospatial data. The sources for the transmission line digitizing are including sub-meter resolution of Digital Globe, Bing, Google, ESRI and NAIP aerial imageries, with scale at least 1:5,000. Occasionally, USGS Topographic map, Google Street View and Bing Bird's Eye are used to verify the precise location of a facility. The data was digitized from pole to pole for >= 200 kV transmission lines. For transmission lines < 200kV, the data was digitized on the pole gaps of approximately 1:5,000 or greater. All the data was digitized based on ground level of where a pole was planted.The transmission line was not digitized with one line segment from substation to substation. GIS Unit will merge the multipart lines into one segment in the future, after consulting with the Strategic Transmission Planning and Corridor Designation Office in identifying electricity flow between substation to substation or power plant to substation. Not all transmission line spatial data ended or started with a substation or power plant point spatial data. However, GIS Unit is current developing power plant and substation boundary spatial data which will enclose most of the transmission lines at both ends.

Credits

Use limitations

All the data restriction must comply to Department of Homeland Security 6 CFR Part 29: Procedures for Handling Protected Critical Infrastructure Information.Do not disclose this GIS information/data to any unauthorized person because of its sensitive nature; to restrict disclosure of and access to this information/data to persons within my office; to not redistribute the information/data; and to refer requests for this information/data to the GIS/Cartography Unit of the Energy Commission and to the Energy Commissions Chief Counsels Office.

DISCLAIMER: The California Energy Commission makes no warranties, whether expressed or implied, as to the suitability or accuracy of the product for any particular purpose. Any use of this information is at the user's own risk. For further information or suggestions concerning maps/data, please contact: California Energy Commission- Energy Facilities Siting Division Cartography Unit, 1516 9th Street, MS48, Sacramento, CA 95814. For any further questions, please call Terry Rose or Fui Thong or Travis David at (916) 654-3902.

Extent

West -124.294270 East -112.211877
North 42.086920 South 32.348423

Scale Range
Maximum (zoomed in) 1:5,000
Minimum (zoomed out) 1:150,000,000

ArcGIS Metadata

Topics and Keywords

Themes or categories of the resource utilitiesCommunication


* Content type Downloadable Data
Export to FGDC CSDGM XML format as Resource Description No

Place keywords California

Theme keywords Electric Transmission Line, Imperial Irrigation District, Los Angeles Department of Water and Power, PacifiCorp, Pacific Gas and Electric Company, Southern California Edison, San Diego Gas & Electric, Sacramento Municipal Utility District, Western Area Power Administration

Citation

Title Electric Transmission Lines - California Energy Commission [ds1198]
Publication date 2020-05-1100:00:00


Presentation formats * digital map


Citation Contacts

Responsible party
Organization's name California Energy Commission
Contact's role originator


Responsible party
Individual's name Fui Fang Thong
Organization's name California Energy Commission
Contact's position Research Data Specialist II
Contact's role point of contact


Contact information
Phone
Voice 916-654-3902

Address
Type postal
Delivery point 1516 9th Street MS 48
City Sacramento
Administrative area CA
Postal code 95814
Country US
e-mail address Fui.Thong@energy.ca.gov



Resource Details

Dataset languages * English(UNITED STATES)
Dataset character set utf8 - 8 bit UCS Transfer Format


Status completed
Spatial representation type * vector


* Processing environment Version 6.2 (Build 9200) ; Esri ArcGIS 10.5.1.7333


ArcGIS item properties
* Name Electric Transmission Lines - California Energy Commission [ds1198]
* Location Server=; :; Database=; User=; Version=
* Access protocol ArcSDE Connection

Extents

Extent
Geographic extent
Bounding rectangle
Extent type Extent used for searching
* West longitude -124.294270
* East longitude -112.211877
* North latitude 42.086920
* South latitude 32.348423
* Extent contains the resource Yes

Extent in the item's coordinate system
* West longitude -356284.262300
* East longitude 647174.505300
* South latitude -605723.763400
* North latitude 452064.068400
* Extent contains the resource Yes

Resource Points of Contact

Point of contact
Organization's name California Energy Commission
Contact's role originator


Point of contact
Individual's name Fui Fang Thong
Organization's name California Energy Commission
Contact's position Research Data Specialist II
Contact's role point of contact


Contact information
Phone
Voice 916-654-3902

Address
Type postal
Delivery point 1516 9th Street MS 48
City Sacramento
Administrative area CA
Postal code 95814
Country US
e-mail address Fui.Thong@energy.ca.gov



Resource Maintenance

Resource maintenance
Update frequency unknown


Resource Constraints

Constraints
Limitations of use

All the data restriction must comply to Department of Homeland Security 6 CFR Part 29: Procedures for Handling Protected Critical Infrastructure Information.Do not disclose this GIS information/data to any unauthorized person because of its sensitive nature; to restrict disclosure of and access to this information/data to persons within my office; to not redistribute the information/data; and to refer requests for this information/data to the GIS/Cartography Unit of the Energy Commission and to the Energy Commissions Chief Counsels Office.

DISCLAIMER: The California Energy Commission makes no warranties, whether expressed or implied, as to the suitability or accuracy of the product for any particular purpose. Any use of this information is at the user's own risk. For further information or suggestions concerning maps/data, please contact: California Energy Commission- Energy Facilities Siting Division Cartography Unit, 1516 9th Street, MS48, Sacramento, CA 95814. For any further questions, please call Terry Rose or Fui Thong or Travis David at (916) 654-3902.


Spatial Reference

ArcGIS coordinate system
* Type Projected
* Geographic coordinate reference GCS_WGS_1984
* Projection WGS_1984_Web_Mercator_Auxiliary_Sphere
* Coordinate reference details
Projected coordinate system
Well-known identifier 102100
X origin -20037700
Y origin -30241100
XY scale 10000
Z origin 0
Z scale 1
M origin 0
M scale 1
XY tolerance 0.001
Z tolerance 0.001
M tolerance 0.001
High precision true
Latest well-known identifier 3857
Well-known text PROJCS["WGS_1984_Web_Mercator_Auxiliary_Sphere",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator_Auxiliary_Sphere"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",0.0],PARAMETER["Auxiliary_Sphere_Type",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3857]]

Reference system identifier
* Value 3857
* Codespace EPSG
* Version 8.8(9.3.1.2)


Spatial Data Properties

Vector
* Level of topology for this dataset geometry only


Geometric objects
Feature class name DS1198_20200512
* Object type composite
* Object count 0



ArcGIS Feature Class Properties
Feature class name DS1198_20200512
* Feature type Simple
* Geometry type Polyline
* Has topology FALSE
* Feature count 0
* Spatial index TRUE
* Linear referencing FALSE



Geoprocessing history

Process
Date 2020-05-1213:50:24
Tool location c:\program files (x86)\arcgis\desktop10.5\ArcToolbox\Toolboxes\Data Management Tools.tbx\Project
Command issued
Include in lineage when exporting metadata No


Process
Date 2020-05-1213:50:57
Tool location c:\program files (x86)\arcgis\desktop10.5\ArcToolbox\Toolboxes\Conversion Tools.tbx\FeatureClassToFeatureClass
Command issued
Include in lineage when exporting metadata No


Distribution

Distribution format
* Name SDE Feature Class


Transfer options
Online source
Location https://www.wildlife.ca.gov/Data/BIOS
Function performed information

Online source
Location ftp://ftp.wildlife.ca.gov/BDB/GIS/BIOS/Public_Datasets/1100_1199/ds1198.zip
Function performed download

Online source
Location https://cecgis-caenergy.opendata.arcgis.com/datasets/california-electric-transmission-line
Function performed download

Fields

Details for object DS1198_20200512
* Type Feature Class
* Row count 0


Field OBJECTID_1
* Alias OBJECTID_1
* Data type OID
* Width 4
* Precision 10
* Scale 0
* Field description
Internal feature number.
* Description source
Esri
* Description of values
Sequential unique whole numbers that are automatically generated.




Field Shape
* Alias Shape
* Data type Geometry
* Width 4
* Precision 0
* Scale 0
* Field description
Feature geometry.
* Description source
Esri
* Description of values
Coordinates defining the features.




Field OBJECTID
* Alias OBJECTID
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0
Field description
Internal feature number
Description source
ESRI
Description of values
Sequential unique whole numbers that are automatically generated.




Field Name
* Alias Name
* Data type String
* Width 50
* Precision 0
* Scale 0
Field description
Transmmission line name, which is based on ownership and capacity, assigned by GIS Unit.


Field kV
* Alias kV
* Data type String
* Width 5
* Precision 0
* Scale 0




Field kV_Sort
* Alias kV_Sort
* Data type Double
* Width 8
* Precision 38
* Scale 8
Field description
Capacity in number as data type, which can be used for sorting, and mathematical function or calculation.


Field Owner
* Alias Owner
* Data type String
* Width 15
* Precision 0
* Scale 0
Field description
The ownership for a transmission line.


Field Status
* Alias Status
* Data type String
* Width 11
* Precision 0
* Scale 0
Field description
The stage for a transmission line, which are including: Operationa, Proposed, and Closed


Field Circuit
* Alias Circuit
* Data type String
* Width 31
* Precision 0
* Scale 0
Field description
Type of circuit: Single or Double


Field Type
* Alias Type
* Data type String
* Width 2
* Precision 0
* Scale 0
Field description
The transmission line type: OH: Overhead UG: Underground UW: Under Water


Field Legend
* Alias Legend
* Data type String
* Width 15
* Precision 0
* Scale 0
Field description
The legend of the transmission line for mapping purpose, which is assigned by ownership and kV range


Field Length_Mil
* Alias Length_Mil
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0
Field description
Tranmission line length in mile


Field Length_Fee
* Alias Length_Fee
* Data type String
* Width 16
* Precision 0
* Scale 0
Field description
Transmission line length in feet.


Field TLine_Name
* Alias TLine_Name
* Data type String
* Width 54
* Precision 0
* Scale 0
Field description
Transmission line name assigned by ultility companies


Field Engineerin
* Alias Engineerin
* Data type String
* Width 10
* Precision 0
* Scale 0
Field description
Transmission line engeering ID assigned by utility companies.


Field Engineer_1
* Alias Engineer_1
* Data type String
* Width 43
* Precision 0
* Scale 0
Field description
Transmission line engeering name assigned by utility companies


Field Structure_
* Alias Structure_
* Data type String
* Width 25
* Precision 0
* Scale 0
Field description
Types of transmission towers, which are including but not limit to: Alley Arm Davit Arm Flat Pole H-Frame Insulator Pole Lattice Guyed Tower Lattice Steel Flat Lattice Tower LIne Pole Pits on Arms Pole-T Post Insulator Post Pole Post-T Suspension Pole Triangular Pole Vertical Post Wind Turbine Wishbone Wood. This field is not completed and still work in progress


Field Structur_1
* Alias Structur_1
* Data type String
* Width 12
* Precision 0
* Scale 0
Field description
The material for a tower: Composite, Concret, Steel, and Wood. This field is not completed and still work in progress


Field Source
* Alias Source
* Data type String
* Width 43
* Precision 0
* Scale 0




Field Comments
* Alias Comments
* Data type String
* Width 100
* Precision 0
* Scale 0




Field Creator
* Alias Creator
* Data type String
* Width 39
* Precision 0
* Scale 0




Field Creator_Da
* Alias Creator_Da
* Data type Double
* Width 8
* Precision 38
* Scale 8




Field Last_Edito
* Alias Last_Edito
* Data type String
* Width 15
* Precision 0
* Scale 0




Field Last_Edi_1
* Alias Last_Edi_1
* Data type Double
* Width 8
* Precision 38
* Scale 8




Field GlobalID
* Alias GlobalID
* Data type String
* Width 36
* Precision 0
* Scale 0




Field Shape__Len
* Alias Shape__Len
* Data type Double
* Width 8
* Precision 38
* Scale 8




Field Shape.STLength()
* Alias Shape.STLength()
* Data type Double
* Width 0
* Precision 0
* Scale 0






Metadata Details

* Metadata language English(UNITED STATES)
* Metadata character set utf8 - 8 bit UCS Transfer Format


Scope of the data described by the metadata * dataset
Scope name * dataset


* Last update 2020-05-12


ArcGIS metadata properties
Metadata format ArcGIS1.0
Metadata style FGDC CSDGM Metadata
Standard or profile used to edit metadata FGDC


Created in ArcGIS for the item 2020-05-1213:50:19
Last modified in ArcGIS for the item 2020-05-1213:50:42


Automatic updates
Have been performed Yes
Last update 2020-05-1213:50:42


Metadata Contacts

Metadata contact
Organization's name California Energy Commission
Contact's role originator


Metadata contact
Individual's name Fui Fang Thong
Organization's name California Energy Commission
Contact's position Research Data Specialist II
Contact's role point of contact


Contact information
Phone
Voice 916-654-3902

Address
Type postal
Delivery point 1516 9th Street MS 48
City Sacramento
Administrative area CA
Postal code 95814
Country US
e-mail address Fui.Thong@energy.ca.gov



Metadata Maintenance

Maintenance
Update frequency unknown


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