Geodataset Name:       POWERLINES_JUL17
Geodataset Type:       SHAPEFILE
Geodataset Feature:    Polyline
Feature Count:         3292

DATA SOURCE(S):                    Oak Ridge National Laboratory
SCALE OF ORIGINAL SOURCE MAPS:     Varies
GEODATASET EXTENT:                 State of Florida

PUBLICATION DATE:                  20170802
TIME PERIOD OF CONTENT:            Begin Date: 20140407    End Date: 20170724
DOWNLOAD LINK:                     http://www.fgdl.org/metadataexplorer/explorer.jsp

FEATURE ATTRIBUTE TABLES:

Datafile Name: POWERLINES_JUL17.DBF

FEATURE ATTRIBUTE TABLES CODES AND VALUES:

Item	Item Description
OBJECTID	Internal feature number.
SHAPE	Feature geometry.
ID	Unique ID for each feature.
OWNER	Owner of the transmission line.
STATUS	Operational status of the feature. IN SERVICE = Operational INACTIVE = Not operational PROPOSED = Proposed UNDER CONST = Under construction as of the publication date NOT AVAILABLE = A valid value for a feature in all likelihood exists but has not yet been found via open source or other means. These records may be populated with valid information in future update cycles.
VOLTAGE	Carrying capacity of the transmission line in kilovolts.
VOLT_CLASS	Voltage of the transmission line grouped in industry standard classifications. 100-161 = 100 to 161 Kilovolts 220-287 = 220 - 287 Kilovolts 345 = 345 Kilovolts 500 = 500 Kilovolts 735 AND ABOVE = Greater than or equal to 735 Kilovolts DC = Direct current transmission line NOT AVAILABLE = A valid value for a feature in all likelihood exists but has not yet been found via open source or other means. These records may be populated with valid information in future update cycles. UNDER 100 = Less than 100 Kilovolts
INFERRED	Indicates whether or not VOLTAGE was inferred using one of the methods outlined in the Process Description. Y = Voltage was inferred N = Voltage was not inferred
SUB_1	The name of the associated substation from the substations feature class/shapefile.
SUB_2	The name of the associated substation from the substations feature class/shapefile.
METHOD	Methodology used to validate geospatial location and/or attribution for the feature. IMAGERY = The best available imagery used to determine the location. IMAGERY/OTHER = Imagery and supplemental open source information used to determine the location. OTHER = Open source information used to determine the location. UNVERIFIED = Feature could not be located or the feature has not yet been validated.
DATE_	Date when geospatial location and/or attribution were last validated for the feature.
SOURCE	Original source used to identify geospatial location and/or attribution for the feature.
DESCRIPT	Description of line based on "POWER TRANSMISSION LINE (VOLTAGE: " & [VOLT_CLASS] & ")".
FGDLAQDATE	Date FGDL acquired the data from the Source.
AUTOID	Unique ID added by GeoPlan
SHAPE.LEN	Length in meters

The entity and attribute information provided here describes the tabular data associated with the data set. Please review the detailed descriptions that are provided (the individual attribute descriptions) for information on the values that appear as fields/table entries of the data set. Please see the "Processing Steps" section for further methodology. For string and date data types, NOT AVAILABLE values denote missing data that was not present in the source data. For numeric data types, -999999 denote missing data that was not present in the source data. However, the missing data may be present in other sources not yet discovered and used in the creation and/or maintenance of this dataset. These records may be populated with valid information in future update cycles.

USER NOTES:

Data were extracted from sources (identified in the SOURCE field) and other open source websites to populate the attribute fields. For string and date data types, NOT AVAILABLE values denote missing data that was not present in the source data. For numeric data types, -999999 denote missing data that was not present in the source data. During quality control, attributes were checked to ensure that they fell within the expected ranges or had expected/valid values. Text attribute values were checked for spelling and usage consistency. No topology tests were conducted. All records were verified to occur within the spatial domain of the feature class/shapefile.

Data is complete as of the most recent date indicated in the Time Period section and given available sources.

GeoPlan relied on the integrity of the attribute information within the original data.

None.

This feature class/shapefile is for the Homeland Infrastructure Foundation Level Database (HIFLD) (https://gii.dhs.gov/HIFLD) as well as the Energy modelling and simulation community.

None; all efforts are made to place the geographic representation of the facility on- entity using the best available imagery from a wide variety of sources. Users should read and understand the METHOD metadata as well as the Processing Steps.

None; dataset contains no vertical data.

None (Public Use). Users are advised to read the data set's metadata thoroughly to understand appropriate use and data limitations.

The Florida Geographic Data Library is a collection of Geospatial Data compiled by the University of Florida GeoPlan Center with support from the Florida Department of Transportation. GIS data available in FGDL is collected from various state, federal, and other agencies (data sources) who are data stewards, producers, or publishers. The data available in FGDL may not be the most current version of the data offered by the data source. University of Florida GeoPlan Center makes no guarantees about the currentness of the data and suggests that data users check with the data source to see if more recent versions of the data exist. Furthermore, the GIS data available in the FGDL are provided 'as is'. The University of Florida GeoPlan Center makes no warranties, guaranties or representations as to the truth, accuracy or completeness of the data provided by the data sources. The University of Florida GeoPlan Center makes no representations or warranties about the quality or suitability of the materials, either expressly or implied, including but not limited to any implied warranties of merchantability, fitness for a particular purpose, or non-infringement. The University of Florida GeoPlan Center shall not be liable for any damages suffered as a result of using, modifying, contributing or distributing the materials. A note about data scale: Scale is an important factor in data usage. Certain scale datasets are not suitable for some project, analysis, or modeling purposes. Please be sure you are using the best available data. 1:24000 scale datasets are recommended for projects that are at the county level. 1:24000 data should NOT be used for high accuracy base mapping such as property parcel boundaries. 1:100000 scale datasets are recommended for projects that are at the multi-county or regional level. 1:125000 scale datasets are recommended for projects that are at the regional or state level or larger. Vector datasets with no defined scale or accuracy should be considered suspect. Make sure you are familiar with your data before using it for projects or analysis. Every effort has been made to supply the user with data documentation. For additional information, see the References section and the Data Source Contact section of this documentation. For more information regarding scale and accuracy, see our webpage at: http://geoplan.ufl.edu/education.html

REFERENCES:

Homeland Infrastructure Foundation-Level Data (HIFLD) Open Data https://hifld-geoplatform.opendata.arcgis.com/

DATA LINEAGE SUMMARY:

Authoritative data sources are identified through open source research. That data is then acquired and transformed into a usable data format. The properly formatted data then goes through preprocessing steps that includes a georeferencing or spatial adjustment operation to give spatial context to the data. In the absence of authoritative sources, feature geometry is created based on interpretation of the best available imagery. The data goes through further refinement using remote sensing techniques. After preprocessing, records go through a review process in an effort to meet the goal of placing each feature on a facility based on-entity location based on interpretation of the best available imagery and open source information. The DATE field indicates the date in which the review step took place. Process Date: 20170724 The GeoPlan Center downloaded the electric power transmission lines data from the following website on February 28th 2018. Homeland Infrastructure Foundation-Level Data (HIFLD) Open Data https://hifld-geoplatform.opendata.arcgis.com/ *Previously known as https://hifld-dhs-gii.opendata.arcgis.com/ Electric_Power_Transmission_Lines.zip Electric_Power_Transmission_Lines.shp The data was originally in the following projection: Name: GCS_WGS_1984 Details: Angular Unit: Degree (0.017453292519943295) Prime Meridian: Greenwich (0.000000000000000000) Datum: D_WGS_1984 Spheroid: WGS_1984 Semimajor Axis: 6378137.000000000000000000 Semiminor Axis: 6356752.314245179300000000 Inverse Flattening: 298.257223563000030000 A subset of the dataset was created for Florida where the CNTBND county Extents were buffered by 400m. This was used to clip the original and create the new Powerlines dataset. The dataset was reprojected to FGDL Albers Harn HPGN using the following transformation: WGS_1984_(ITRF00)_To_NAD_1983 + NAD_1983_To_HARN_Florida Deleted the OBJECTID and SHAPE_LEN fields. Added and Populated the DESCRIPT field as: "POWER TRANSMISSION LINE (VOLTAGE: " & [VOLT_CLASS] & ")" Added and Populated the FGDLAQDATE field. Uppercased all fields except the SOURCE fields which contained website information. Updated the metadata. Process Date: 20180228 Dataset copied. Process Date: 20180326

MAP PROJECTION PARAMETERS:

Projection                          ALBERS
Datum                               HPGN
Units                               METERS
Spheroid                            GRS1980
1st Standard Parallel               24  0  0.000
2nd Standard Parallel               31 30  0.000
Central Meridian                   -84 00  0.000
Latitude of Projection's Origin     24  0  0.000
False Easting (meters)              400000.00000
False Northing (meters)             0.00000

DATA SOURCE CONTACT (S):

Name:
Abbr. Name:
Address:


Phone:

Web site:
E-mail:
Contact Person:
         Phone:
        E-mail:

Oak Ridge National Laboratory
ORNL
One Bethel Valley Rd, MS-6017
Oak Ridge, TN
37831
865-241-3976


https://hifld-geoplatform.opendata.arcgis.com/

Name:                   FLORIDA GEOGRAPHIC DATA LIBRARY
Abbr. Name:             FGDL
Address:                Florida Geographic Data Library
                        431 Architecture Building
                        PO Box 115706
                        Gainesville, FL  32611-5706
Web site:               http://www.fgdl.org

Contact FGDL: 

      Technical Support:	        http://www.fgdl.org/fgdlfeed.html
      FGDL Frequently Asked Questions:  http://www.fgdl.org/fgdlfaq.html
      FGDL Mailing Lists:		http://www.fgdl.org/fgdl-l.html
      For FGDL Software:                http://www.fgdl.org/software.html