FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION

TITLE: AM TOWER STRUCTURES - FEBRUARY 2009

Geodataset Name:       AMTOW_FEB09
Geodataset Type:       SHAPEFILE
Geodataset Feature:    Point
Feature Count:         242
GENERAL DESCRIPTION:
This dataset contains the spatial extent of AM tower structures in the state of Florida. AM stands for "Amplitude Modulation", which refers to the means of encoding the audio signal on the carrier frequency. In many countries, AM radio stations are known as "medium wave"(MW) stations. AM stations are also sometimes referred to as "standard broadcast stations", since AM was the first form used to transmit broadcast radio signals to the public.
DATA SOURCE(S):                    Federal Communications Commission
SCALE OF ORIGINAL SOURCE MAPS:     Unknown
GEODATASET EXTENT:                 State of Florida
PUBLICATION DATE: 20090311 TIME PERIOD OF CONTENT: 20090226 DOWNLOAD LINK: http://www.fgdl.org/metadataexplorer/explorer.jsp

FEATURE ATTRIBUTE TABLES:

Datafile Name: AMTOW_FEB09.DBF
ITEM NAME WIDTH TYPE
OBJECTID
4 OID
Shape
4 Geometry
CALLSIGN
6 String
FREQUENCY
9 String
SERVICE
2 String
CLASS
1 String
STATUS
3 String
CITY
20 String
STATE
2 String
COUNTRY
2 String
FILENUM
20 String
FACID
8 Double
LAT
9 String
LON
10 String
LICENSEE
60 String
LATDD
8 Double
LONDD
8 Double
DESCRIPT
51 String
FGDLAQDATE
36 Date
AUTOID
4 Integer

FEATURE ATTRIBUTE TABLES CODES AND VALUES:

Item
Item Description
OBJECTID Internal feature number.

Shape Feature geometry.

CALLSIGN Callsign of facility or station (W = East of the Misssissippi)

FREQUENCY AM station frequncy. AM stations occupy the frequencies of 540 kHz to 1700 kHz. These stations are allocated on a non-interference basis.

SERVICE Service type. AM for all.

CLASS FCC given code. The AM band frequencies are divided into three categories: Clear, Regional, and Local channels. The allowable classes depend on a station's frequency, in addition to other variables. On the Clear channels certain stations are specifically classified as Class A stations or as Class B stations. The other stations have their class determined by the frequency.
A = Class A station is an unlimited time station (that is, it can broadcast 24 hours per day) that operates on a clear channel. The operating power shall not be less than 10 kilowatts (kW) or more than 50 kW.

B = Class B station is an unlimited time station. Class B stations are authorized to operate with a minimum power of 0.250 kW (250 watts) and a maximum power of 50 kW. (If a Class B station operates with less than 0.250 kW, the RMS must be equal to or greater than 141 mV/m at 1 km for the actual power.) If the station is authorized to operate in the expanded band (1610 to 1700 kHz), the maximum power is 10 kW.

C = Class C station is an unlimited time station that operates on a local channel. The power shall not be less than 0.25 kW nor more than 1 kW. Class C stations that are licensed to operate with 0.100 kW may continue to operate as licensed.

D = Class D station operates either daytime, limited time, or unlimited time with a nighttime power less than 0.250 kW and an equivalent RMS antenna field less than 141 mV/m at 1 km for the actual power. Class D stations shall operate with daytime powers not less than 0.250 kW nor more than 50 kW. NOTE: If a station is an existing daytime-only station, its class will be Class D.


STATUS Undefined by Source.

CITY City location of "LICENSEE"

STATE State location of "LICENSEE"

COUNTRY Country location of "LICENSEE"

FILENUM The FCC-assigned file number of the application.

FACID Facility ID

LAT Latitude

LON Longitude

LICENSEE Company or organization that holds the legal license from the Federal Communications Commission.

LATDD Latitude in decimal degrees

LONDD Longitude in decimal degrees

DESCRIPT Description field based on LICENSEE

FGDLAQDATE GeoPlan Acquisition Date

AUTOID Unique ID added by GeoPlan


USER NOTES:
This data is provided 'as is'. GeoPlan relied on the integrity
of the original data layer's topology
This data is provided 'as is' by GeoPlan and is complete to our
knowledge.
GeoPlan relied on the integrity of the attribute information within
the original data.

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 reservation boundaries, FCC licensee data or FCC market 
boundaries.

This data is provided 'as is' and its horizontal positional accuracy
has not been verified by GeoPlan

This data is provided 'as is' and its vertical positional accuracy
has not been verified by GeoPlan

Any use of trade, product, or firm names is for descriptive purposes only 
and does not imply endorsement by the U.S. Government or the Federal 
Communications Commission (FCC). No warranty expressed or implied is 
made by the FCC as to the accuracy of the data and related materials. 
The act of distribution shall not constitute any such warranty, and no 
responsibility is assumed by the FCC in the use of this data, or related 
materials.

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:
Federal Communications Commission:
http://www.fcc.gov/

FCC Radio Service Code List:
http://www.perconcorp.com/documents/rscode.pdf

Universal Licensing System Glossary:
http://wireless.fcc.gov/uls/index.htm?job=glossary

DATA LINEAGE SUMMARY:
Data was downloaded by GeoPlan in shapefile format from the FCC website 
(http://wireless.fcc.gov/geographic/index.htm?job=licensing_database_extracts) 
on July, 28 2009. When received the data was in the following projection: Geographic,  
Datum: NAD 27, Spheroid: Clarke1866, Units: Decimal Degrees. Points for only the 
State of Florida were exported using the selection "STATE" = 'FL' and the data was
projected to FGDL Albers HPGN.

- Changed original file name from AM to amtow_feb09
- DESCRIPT item was added based on the item LICENSEE
- FGDLAQDATE was added based on date downloaded from source
Process Date: 20090728

Data imported to ArcSDE and exported as a shapefile. Process Date: 20090729
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:
Federal Communications Commission
FCC
445 12th Street SW
Washington, D.C.
20554
202-418-0615

http://wireless.fcc.gov/geographic/index.htm?job=licensing_database_extracts melvin.delrosario@fcc.gov Melvin C. Del Rosario

FGDL CONTACT:
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