FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION

TITLE: FLORIDA AIDS TO NAVIGATION - DECEMBER 2013

Geodataset Name:       CGATON_DEC13
Geodataset Type:       SHAPEFILE
Geodataset Feature:    Point
Feature Count:         18436
GENERAL DESCRIPTION:
This GIS data set represents the aids to navigation (ATONs) for the Seventh and Eighth Coast Guard Districts. This is a subset of all aids, to obtain a complete dataset visit (http://ocean.floridamarine.org/mrgis/Description_Layers_Marine.htm). The term "aids to navigation" refers to devices outside of a vessel that are used to assist mariners in determining their position, safe course or warn them of obstructions. Aids to navigation include light buoys and beacons. This data set includes federal aids, which are installed and maintained by the Coast Guard, as well as some privately maintained aids. This data set does not include unofficial (illegal) aids, such as PVC pipes, placed without permission. This data set is not certified for navigation and is not intended for navigation purposes. Each USCG district headquarters is responsible for updating its database on an as-needed basis. When existing aids are destroyed or relocated and new aids are installed, the database is updated. Each aid is assigned an official light listing number. The Light List is a document listing the status of the ATONs; it is regularly published and distributed. Interim changes to the Light List are published in local notices to mariners. In addition, the USCG broadcasts notices to mariners on the marine band radio as soon as changes in the status of individual aids are reported. Navigators should use the official notices to mariners to maintain current charts. Annual (or more frequent) updates of the Aids to Navigation database can be obtained from each USCG district headquarters.
DATA SOURCE(S):                    Florida Fish and Wildlife Conservation Commission-Fish and Wildlife Research Institute
SCALE OF ORIGINAL SOURCE MAPS:     Unknown
GEODATASET EXTENT:                 State of Florida
PUBLICATION DATE: 20131219 TIME PERIOD OF CONTENT: 20131219 DOWNLOAD LINK: http://www.fgdl.org/metadataexplorer/explorer.jsp

FEATURE ATTRIBUTE TABLES:

Datafile Name: CGATON_DEC13.DBF
ITEM NAME WIDTH TYPE
OBJECTID
4 OID
Shape
4 Geometry
GENERATED
36 Date
DISTRICT
8 Double
LLNR
8 Double
AID_NAME
254 String
AID_LABEL
254 String
AID_NUM
8 Double
AID_TYPE
254 String
ODD_EVEN
254 String
ASSIGNED_L
254 String
LATDD
8 Double
ASSIGNED_1
254 String
LONDD
8 Double
STRUCTURE_
254 String
XREF
8 Double
CHARACTERI
254 String
NIGHT_DAY
254 String
REMARKS
254 String
AID_LOCATI
254 String
DESCRIPT1
10 String
DESCRIPT2
30 String
SYMBOL
15 String
DESCRIPT
71 String
FGDLAQDATE
36 Date
AUTOID
4 Integer

FEATURE ATTRIBUTE TABLES CODES AND VALUES:

Item
Item Description
OBJECTID Internal feature number.

Shape Feature geometry.

GENERATED Date generated

DISTRICT Coast Guard District
7 = Seventh Coast Guard District

8 = Eighth Coast Guard District


LLNR Light List Number

AID_NAME Aid Name

AID_LABEL Aid Label - number and letter (from Aid_Name)

AID_NUM Aid Number (from Aid Name)

AID_TYPE Aid Type
FD = Federal

PA = Private


ODD_EVEN Indicates if numbered aids are odd or even numbers
O = Odd

E = Even


ASSIGNED_L Assigned Latitude

LATDD Latitude in decimal degrees

ASSIGNED_1 Assigned Longitude

LONDD Longitude in decimal degrees

STRUCTURE_ Structure remarks

XREF Undefined by Source

CHARACTERI Light Characteristics
F = Fixed

FL = Flashing

FL (2) = Group Flashing

ISO = Isophase

MO = Morse Code

OC = Occulting

Q = Quick (Flashing)

S = Seconds

Y = Yellow

R = Red

W = White

G = Green


NIGHT_DAY Day or night beacon. Can be Day, Night, or Both.

REMARKS Remarks

AID_LOCATI Aid location comments

DESCRIPT1 Abbreviated description of aid type (from Aid_Name)
DBN = Daybeacon

LB = Lighted buoy

LT = Light

RACN = Racon

RF = Range front light

RR = Range rear light

ULB = Unlighted buoy


DESCRIPT2 Full description of aid type (from Aid_Name)

SYMBOL Concatenation of DESCRIPT and ODD_EVEN. Used to define categories for symbology

DESCRIPT FGDL added field based on AID_NAME

FGDLAQDATE FGDL added field based on date downloaded from source

AUTOID Unique ID added by GeoPlan


USER NOTES:
Records without coordinates were removed.
Aids without coordinates have been removed. Otherwise this data set is 
complete as the source data provided by the Coast Guard.
GeoPlan relied on the integrity of the attribute information within
the original data.
Prior to July 1, 2004, the Fish and Wildlife Research Institute (FWRI) 
was known as the Florida Marine Research Institute (FMRI). The institute 
name has not been changed in historical data sets or references to work 
completed by the Florida Marine Research Institute. The institute name has 
been changed in references to ongoing research, new research, and contact 
information.

This data set represents a GIS layer of ATONs as of December 19, 2013; 
with spatial extent of the Seventh Coast Guard District plus the Gulf of Mexico 
area from the Eighth Coast Guard District.

These data are not to be used for navigation or positional referencing. 
Users are instructed to consult the appropriate navigational chart, notice 
to mariners, and light list for any purpose other than natural resource 
conservation planning. Due to the possibility of unknown errors in reporting, 
projection or datums the accuracy of these data are not certified.  The 
existence, position and description of features might have changed 
since data were originally compiled.

FWRI has not attempted to verify horizontal positional accuracy, but 
typographical errors may exist in the source data.

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

These data are not to be used for navigation or positional referencing. 
Users are instructed to consult the appropriate navigational chart, notice 
to mariners, and light list for any purpose other than natural resource 
conservation planning. Due to the possibility of unknown errors in 
reporting, projection or datums the accuracy of these data are not 
certified.  The existence, position and description of features might 
have changed since data were originally compiled.

Users are encouraged to read and fully comprehend the metadata record 
prior to using these data.  Please acknowledge the Florida Fish and Wildlife 
Conservation Commission (FWC) as the data source for any products developed 
from these data. Users should be aware that comparison with other data sets 
for the same area may be inaccurate due to inconsistencies resulting from 
changes in mapping conventions, data collection techniques, and computer 
processes over time. FWC shall not be liable for improper or incorrect use 
of these data.

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:
FWC-FWRI (Florida Fish and Wildlife Conservation Commission 
Fish and Wildlife Research Institute) 
http://ocean.floridamarine.org

USCG ATON home:
http://www.uscgaan.com/federal_aton%27s.htm

USCG ATON pamphlet:
http://www.uscgboating.org/assets/1/workflow_staging/Publications/486.PDF

USCG ATON manual:
http://www.uscg.mil/directives/cim/16000-16999/CIM_16500_7A.pdf

USCG ATON Structures manual:
http://www.uscg.mil/directives/cim/16000-16999/CIM_16500_25A.pdf

DATA LINEAGE SUMMARY:
The source data were downloaded as XML Spreadsheets from the Coast 
Guard Light List Weekly Updates site. FWRI reformatted the latitude and 
longitude to decimal degrees in order to convert to shapefile using the Add 
X,Y tool in ArcMap. FWRI also added additional attributes based on the 
information provided by the coast guard in order to create symbology fields. 
See the Entity and Attribute Section for more information.
Process Date: 201312

GeoPlan received this data in shapefile format via FTP from FWRI on July 1, 2014. The data was received as a shapefile in projection: Albers NAD 83. The dataset was then projected from Albers NAD 83 to FGDL Albers HPGN. The shapefile received had 22131 records some of which fell outside the FGDL extent. The records that fell within the FGDL extent were selected out and exported to a new shapefile. Therefore this data set does not represent all aids to navigation for the Seventh and Eighth Coast Guard Districts. The final FGDL data set has 18436 records. For a complete Seventh and Eighth USCG District data set visit the FWRI site at: http://ocean.floridamarine.org/mrgis/Description_Layers_Marine.htm - Reprojected data to FGDL Albers HPGN - Added DESCRIPT field based on AID_NAME - Changed name of original DESCRIPT field to DESCRIPT1 - Added a FGDLAQDATE field based on date received from source - Renamed shapefile from atons_uscg_point to cgaton_dec13 Process Date: 20140707
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:
Florida Fish and Wildlife Conservation Commission-Fish and Wildlife Research Institute
USCG
100 Eighth Avenue Southeast
St. Petersburg, Florida
33701
727-896-8626

http://ocean.floridamarine.org/mrgis/Description_Layers_Marine.htm GISLibrarian@MyFWC.com Andrew Hayslip

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