Geodataset Name:       FAAOBS_JUN19
Geodataset Type:       SHAPEFILE
Geodataset Feature:    Point
Feature Count:         23575

DATA SOURCE(S):                    Federal Aviation Administration
SCALE OF ORIGINAL SOURCE MAPS:     Unknown
GEODATASET EXTENT:                 State of Florida

PUBLICATION DATE:                  20190626
TIME PERIOD OF CONTENT:            20190626
DOWNLOAD LINK:                     http://www.fgdl.org/metadataexplorer/explorer.jsp

FEATURE ATTRIBUTE TABLES:

Datafile Name: FAAOBS_JUN19.DBF

FEATURE ATTRIBUTE TABLES CODES AND VALUES:

Item	Item Description
OBJECTID	Internal feature number.
Shape	Feature geometry.
OAS	ORS Number - All obstacles are assigned a uniques number based on state or county. The ORS number consists of a two-digit code, a dash, and a six-character number.
VERIFIED_S	Verification Status O = Verified U = Unverified
COUNTRY	Country Identifier.
STATE	State Identifier.
CITY	City Name.
LATDEC	Latitude of Obstruction. Decimal degrees.
LONDEC	Longitude of Obstruction. Decimal degrees.
DMSLAT	Latitude - Degrees, Minutes, Seconds
DMSLON	Longitude - Degrees, Minutes, Seconds
DMSLAT_D	Latitude. Decimal degrees.
DMSLON_D	Longitude. Decimal degrees.
TYPE	Obstacle Type.
QUANTITY	Quantity.
AGL	Above Ground Level Height (Feet).
AMSL	Above Mean Sea Level Height (Feet).
LIGHTING	Type of Lighting. R = Red D = Medium Intensity White Strobe & Red H = High Intensity White Strobe & Red M = Medium Intensity White Strobe S = High Intensity White Strobe F = Flood C = Dual Medium Catenary W = Synchronized Red Lighting L = Lighted (Type Unknown) N = None U = Unknown
ACCURACY	Horizontal and Vertical Accuracy. 1 = +-20' horizontal accuracty 2 = +-50' horizontal accuracty 3 = +- 100' horizontal accuracty 4 = +- 205' horizontal accuracty 5 = +- 500' horizontal accuracty 6 = +- 1000' horizontal accuracty 7 = +- 1/2 NM horizontal accuracty 8 = +- 1 NM horizontal accuracty 9 = Unknown A = +- 3' vertical accuracy B = +- 10' vertical accuracy C = +- 20' vertical accuracy D = +- 50' vertical accuracy E = +- 125' vertical accuracy F = +- 250' vertical accuracy G = +- 500' vertical accuracy H = +- 1000' vertical accuracy I = Unknown
MARKING	Mark Indicator - Type of Marking. P = Orange or Orange and White Paint W = White Paint Only M = Marked M = Marked F = Flag Marker S = Spherical Marker N = None U = Unknown
FAA_STUDY	FAA Study Number.
ACTION	Action. A = Add C = Change D = Dismantle
JDATE	Date of Action.
LAT_DD	Latitude in decimal degrees
LONG_DD	Longitude in decimal degrees
MGRS	Military Grid Reference System (MGRS) Coordinate of the Facility. The MGRS is the geocoordinate standard used by NATO militaries for locating points on the earth. The MGRS provides a means to represent any location on the surface of the Earth using an alphanumeric string. Hierarchical references are based on the Universal Transverse Mercator (UTM) coordinate system. The MGRS is used for the entire earth.
GOOGLEMAP	Webpage hyperlink to location in Google Maps
DESCRIPT	GeoPlan Added Field Based on OBSTCLTYPE.
FGDLAQDATE	GeoPlan Added Field Based on Date Downloaded from Source.
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.

DIGITAL OBSTACLE FILE The Digital Obstacle File (DOF) is a listing of verified and unverified obstacles in the U.S. with limited coverage of the Pacific, the Caribbean, Canada, Mexico, and the Bahamas. The obstacles are assigned unique alphanumerical identifiers and are listed in order by ascending latitude within each state or country. The DOF digital product is updated every 56 days. SPECIAL NOTICE Important Information on the Horizontal Datum: The World Geodetic System 1984 (WGS 84) is used as the horizontal datum for all DOF data. All obstacle data has been converted to WGS 84 as of November 19, 2007. CAUTION The Digital Obstacle File contains only obstruction data for those man-made objects which affect domestic aeronautical charting products and does not purport to indicate the presence of all obstructions which may be encountered. NOTE In the interest of air safety, the Digital Obstacle File depicts both "verified" and "unverified" obstruction data. A verified obstruction is indicated by an "O" in the Verification Status field. This data has either been reviewed by the FAA's Aeronautical Information Services (AIS), Obstacle Data Team (ODT) or has been taken from airport survey data. Verified obstacles have been assigned an accuracy code, indicating the reliability of its vertical height and horizontal position. An unverified obstruction is indicated by a "U" in the Verification Status field. This data is considered unreliable because its position and height have not been verified by the ODT.

The data was created to serve as base information for use in GIS systems for a variety of planning and analytical purposes.

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

NONE

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 Aviation Administration: https://www.faa.gov/

DATA LINEAGE SUMMARY:

The GeoPlan Center took the following steps during the QA/QC process: - Downloaded the Digital Obstacle File (DOF) for Entire U.S. and Territories from the FAA Aeronautical Information Services website: https://www.faa.gov/air_traffic/flight_info/aeronav/digital_products/dof/ - Data was downloaded as a CSV file and was then converted to a shapefile using the LATDEC and LONDEC fields and the Display XY function in ArcMap. The projection in this tool was defined as WGS 84 per the README.PDF. The display file was exported to a permanent shapefile using the Export Data function. - The new shapefile was projected into the NAD 1983 FGDL Albers HARN projection. NOTE: This process resulted in an approximate 1 meter spatial shift in data point locations from the prior dataset. The largest shift observed was 107 meters and the shift represented a better representation of the data. The recommended transformation (WGS_1984_(ITRF00)_To_NAD_1983 + NAD_1983_To_HARN_Florida) was used. - DESCRIPT field added based on the TYPE field. - FGDLAQDATE field added based on the date the dataset was downloaded from the source. THE FOLLOWING FIELDS WERE ALSO ADDED: MGRS, LAT_DD, LONG_DD, and GOOGLEMAP - The longest record for each field was calculated and field character lengths were shortened to the appropriate shortest length possible. - Fields and records were uppercased. Process Date: 20190626 Dataset copied. Process Date: 20190728

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 Aviation Administration (FAA), Aeronautical Information Services
FAA/AIS
1305 East-West Highway
Silver Spring, MD
20910
(800) 626-3677


https://www.faa.gov/air_traffic/flight_info/aeronav/digital_products/dof/
9-AMC-Aerochart@faa.gov

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