FM Transmission Towers

ISO-19139 Metadata

Metadata Information:

Metadata language:

Metadata character set: utf8

Last update: 2016-12-20

Metadata contact - pointOfContact:

Organization's name: Federal Communications Commission (FCC)

Contact's position: Senior Engineer

Scope of the data described by the metadata: dataset

Name of the metadata standard used: NAP - Metadata

Version of the metadata standard: 1.2

Metadata identifier: 1523296840195r7898311243745655

Resource Identification Information:

Citation:

Title: FM Transmission Towers

Reference date - publication: 2012-06-14

Presentation format: mapDigital

Party responsible for the resource - originator:

Organization's name: Federal Communications Commission (FCC)

 FM transmission tower locations as recorded by the Federal Communications Commission, extracted from the FCC Licensing Database.

 This dataset represents FM transmission tower locations as recorded by the Federal Communications Commission.

Serve as base information for use in GIS systems for general planning, analytical, and research purposes. It is not intended for engineering work or to legally define FCC licensee data or FCC market boundaries. The material in these data and text files are provided as-is. The FCC disclaims all warranties with regard to the contents of these files, including their fitness. In no event shall the FCC be liable for any special, indirect, or consequential damages whatsoever resulting from loss or use, data or profits, whether in connection with the use or performance of the contents of these files, action of contract, negligence, or other action arising out of, or in connection with the use of the contents of these files. It is know that there are some errors in the licensing information - Latitude, Longitude and Ground Elevation data as well as frequency assignment data from which these files were generated.

Constraints:

Limitations of use: Access Constraint: None (Public Domain Information) Use Constraint: None (Public Use)

Legal constraints:

Limitations of use: None (Public Domain Information)

 Caution should be exercised by the user of this feature class.  This feature class does not contain fields of attribution for MEDS attributes of ADDRESS, ZIP, ZIP+4, COUNTY, TELEPHONE (non-PII general switchboard phone number), and COUNTY FIPS, nor does it contain other attributes to indicate tower height, tower type, whether the tower is on a building, or the tower registration number.  Examination of the data also reveals uncertainty about the locational information; does the value in the CITY field represent the city where the transmitter is located or the city where the licensee is located.  This uncertainty produces out-of-area results, or mismatches between CITY and the geographic coordinates of the actual point of the feature.

If you are using this dataset as a shapefile, please be aware that it was converted from a Geodatabase.  As a result, this shapefile may have attribution and metadata errors resulting from the conversion process. The following are known issues: null values may have been changed to 0s (zeros) or to blank values, numbers (including latitude and longitude) may have been rounded up or down, there may be issues with Unicode character strings, and time cannot be stored in a date field. Field names may have been truncated to no longer than 10 characters or completely changed, lengthy string attributes may have been truncated to 254 characters, and attribute columns may have been deleted. Shapefiles do not support coded domains and subtypes therefore the original file geodatabase attribution and metadata information for coded domains and subtypes could be incorrect or missing in the shapefile version. Please visit the following ESRI website for more information: caution-http://pro.arcgis.com/en/pro-app/tool-reference/appendices/geoprocessing-considerations-for-Shapefile-output.htm

Spatial Representation - Vector:

Level of topology for this dataset: geometryOnly

Geometric objects:

Object type: point

Object count: 19212

Reference System Information:

Reference system identifier:

Value: 4326

Code space: EPSG

Version: 8.6.2

Data Quality Information:

Lineage:

Process step:

When the process occurred: 2016-11-14T00:00:00

Description: Changed the LATDD/LONGDD for all entries by adding the appropriate negative (-) sign to those in the western and southern hemispheres, and positive to those in the eastern and northern hemispheres -- these points were then moved to the correctly attributed coordinates. Removed "etc" and secondary cities if the entry listed two from the CITY attribute column. Standardized abbreviations and spelling in the LICENSEE field. Updated the blank value in the STATE field to the actual value of 'MN'. Populated '-' entries with NA within the CLASS attribute column. Added 'NA' enumerated domain value to the CLASS attribute metadata.

Process contact - pointOfContact:

Organization's name: HIFLD Support Team

Distribution Information:

Distributor:

Format:

Format name: File Geodatabase Feature Class

Format version:

Transfer options:

Online resource:

Online location:http://fcc.gov/api/content.json

Connection protocol: