FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION

TITLE: FLORIDA AIDS TO NAVIGATION - NOVEMBER 2016

Geodataset Name:       CGATON_NOV16
Geodataset Type:       SHAPEFILE
Geodataset Feature:    Point
Feature Count:         18674
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://geodata.myfwc.com/).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: 20170112 TIME PERIOD OF CONTENT: 20161116 DOWNLOAD LINK: http://www.fgdl.org/metadataexplorer/explorer.jsp

FEATURE ATTRIBUTE TABLES:

Datafile Name: CGATON_NOV16.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
25 String
AIS
5 String
DESCRIPT
73 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 and AIS. Used to define categories for symbology

AIS Undefined by Source

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 November 16, 2016; 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://myfwc.com/research/gis/

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

USCG ATON pamphlet:
http://www.uscgboating.org/ATON/index.html

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: 20161116

GeoPlan received this data in shapefile format via FTP from FWRI on June 21, 2017. The data was received as a shapefile in projection: NAD_1983_2011_Florida_GDL_Albers. The dataset was then projected from NAD_1983_2011_Florida_GDL_Albers to FGDL Albers HARN using NAD_1983_To_HARN_Florida transformation. This is the first time we've received this dataset in NAD_1983_2011_Florida_GDL_Albers. Previously it came in a custom PCS Albers projection. Projecting using the following transformation: nad_1983_harn_to_nad_1983_2011 has introduced a shift between 0.5 and 1 meter. The shapefile received had 22221 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 18674 records. For a complete Seventh and Eighth USCG District data set visit the FWRI site at: http://geodata.myfwc.com/ - Reprojected data to FGDL Albers HARN - Changed name of original DESCRIPT field to DESCRIPT1 - Added DESCRIPT field based on AID_NAME - Added a FGDLAQDATE field based on date received from source - Renamed shapefile from atons_uscg_point to cgaton_nov16 Process Date: 20160620
Dataset copied. Process Date: 20171103
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
FFWCC-FWRI
100 Eighth Avenue Southeast
St. Petersburg, Florida
33701
727-896-8626

http://geodata.myfwc.com/datasets/aids-to-navigation-southeast-united-states GISLibrarian@MyFWC.com GIS Librarian

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