This dataset contains the locations of Federal Aviation Administration known obstructions. 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 Digital Obstacle File, from which this layer was created, 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. PLEASE 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. This is an update to the FGDL layer faaobs_jun16.
The data was created to serve as base information for use in GIS systems for a variety of planning and analytical purposes.
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.
publication date
NONE
1305 East-West Highway
FEDERAL AVIATION ADMINISTRATION (FAA) AERONAUTICAL INFORMATION SERVICES (AIS) OBSTACLE DATA TEAM (ODT) ORS DIGITAL OBSTACLE FILE (DOF)
GeoPlan relied on the integrity of the attribute information within the original data.
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.
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
Spatial and Attribute Information
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/ - The original zipfile (DAILY_DOF.ZIP) contained the DOF.DAT file. The DOF_README.PDF was also downloaded to understand the contents of the DOF.DAT file. - The DOF.DAT file was imported into an excel spreadsheet. The data was converted to columns using the fixed width method and information from the README.PDF. - After conversion, any blank columns were deleted. Titles were added to the columns using the README.PDF and the excel table was cleaned. - The excel spreadsheet was then opened in ArcMap and then saved as a .DBF file. - LATITUDE and LONGITUDE fields were added using the following calculations from the Geographical Coordinates in the table: [LAT_D] + ( [LAT_M] / 60 ) + ( [LAT_S] / 3600 ) ( [LONG_D] + ( [LONG_M] / 60 ) + ( [LONG_S] / 3600 ) ) * -1 Resulting fields are in decimal degrees. - The table was converted to a shapefile using the LATITUDE and LONGITUDE 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 recommended transformation (GS_1984_(ITRF00)_To_NAD_1983 + NAD_1983_To_ HARN_Florida) was used. - DESCRIPT field added based on the OBSTCLTYPE field. - FGDLAQDATE field added based on the date the dataset was downloaded from the source. - The LAT_S and LONG_S fields were recalculated to add in the direction information (N or W) and the field containing solely that direction information was removed. - 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. - Layer name changed from DOF.shp to faaobs_sep17.shp.
Dataset copied.
Internal feature number.
ESRI
Feature geometry.
Esri
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.
FAA/AIS
Verification Status.
FAA/AIS
Verified
FAA/AIS
Unverified
FAA/AIS
Country Identifier.
FAA/AIS
State Identifier.
FAA/AIS
City Name.
FAA/AIS
Latitude Degrees.
FAA/AIS
Latitude Minutes.
FAA/AIS
Latitude Seconds.
FAA/AIS
Longitude Degrees.
FAA/AIS
Longitude Minutes.
FAA/AIS
Longitude Seconds.
FAA/AIS
Obstacle Type.
FAA/AIS
Quantity.
FAA/AIS
Above Ground Level Height (Feet).
FAA/AIS
Above Mean Sea Level Height (Feet).
FAA/AIS
Type of Lighting.
FAA/AIS
Red
FAA/AIS
Medium Intensity White Strobe & Red
FAA/AIS
High Intensity White Strobe & Red
FAA/AIS
Medium Intensity White Strobe
FAA/AIS
High Intensity White Strobe
FAA/AIS
Flood
FAA/AIS
Dual Medium Catenary
FAA/AIS
Synchronized Red Lighting
FAA/AIS
Lighted (Type Unknown)
FAA/AIS
None
FAA/AIS
Unknown
FAA/AIS
Horizontal Accuracy.
FAA/AIS
+-20'
FAA/AIS
+-50'
FAA/AIS
+-100'
FAA/AIS
+-250'
FAA/AIS
+-500'
FAA/AIS
+-1000'
FAA/AIS
+-1/2 NM
FAA/AIS
+-1 NM
FAA/AIS
Unknown
FAA/AIS
Vertical Accuracy.
FAA/AIS
+-3'
FAA/AIS
+-10'
FAA/AIS
+-20'
FAA/AIS
+-50'
FAA/AIS
+-125'
FAA/AIS
+-250'
FAA/AIS
+-500'
FAA/AIS
+-1000'
FAA/AIS
Unknown
FAA/AIS
Mark Indicator - Type of Marking.
FAA/AIS
Orange or Orange and White Paint
FAA/AIS
White Paint Only
FAA/AIS
Marked
FAA/AIS
Flag Marker
FAA/AIS
Spherical Marker
FAA/AIS
None
FAA/AIS
Unknown
FAA/AIS
FAA Study Number.
FAA/AIS
Action.
FAA/AIS
Add
FAA/AIS
Change
FAA/AIS
Dismantle
FAA/AIS
Date of Action.
FAA/AIS
Latitude of Obstruction.
GeoPlan
Longitude of Obstruction.
GeoPlan
GeoPlan Added Field Based on OBSTCLTYPE.
GeoPlan
GeoPlan Added Field Based on Date Downloaded from Source.
GeoPlan
Unique ID added by GeoPlan
GeoPlan
431 Architecture PO Box 115706
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
1305 East-West Highway