SEFSC GoMMAPPS 2017 Summer Aerial Survey

NOAA Southeast Fisheries Science Center (SEFSC)

Dataset credit

NOAA Southeast Fisheries Science Center (SEFSC)


Primary contact Gina Rappucci NOAA Southeast Fisheries Science Center
Secondary contact Lance Garrison NOAA Southeast Fisheries Science Center
Data entry Ei Fujioka Duke University



As part of the GoMMAPPS program, the Southeast Fisheries Science Center conducted aerial surveys of continental shelf waters (up to the 200-m isobath) in the U.S. Gulf of Mexico. The survey was conducted between 29 June and 17 August 2017 aboard a NOAA Twin Otter aircraft at an altitude of 600 feet (183 m) and a speed of 100-110 knots. Survey tracklines were oriented perpendicular to the shoreline and latitudinally spaced 20 km apart. The survey was designed for analysis using Distance sampling with a two-team (independent observer) approach to correct for perception bias in resulting abundance estimates.
The study area extended from the shoreline to the 200-m isobath between Key West, FL and Brownsville, TX, and included fine-scale tracklines over estuarine waters of Mississippi Sound.


The goal of the survey was to conduct line-transect surveys using the Distance sampling approach to estimate the abundance and spatial distribution of marine mammals and sea turtles in waters over the continental shelf in the U.S. Gulf of Mexico.

Supplemental information

Provider's survey code is TOSE17SUM.
Perpendicular distance to the animal is not publicly available.
The dataset is accompanied by transect (effort) data which is provided as a separate file.
Sightings included were detected by the forward team.

Environmental Attribute Codes
Beaufort Sea state
0 Calm, mirror like seas
1 Waves <1ft, rippled surface
2 Small wavelets (<2 ft), no white caps
3 Large wavelets (<3ft), scattered white caps
4 Swell 3-4 ft, numerous white caps
5 Swell >5 ft, many white caps, some spray
6 Swell >10 ft, white caps everywhere, spray
0 Clear
1 0-25% Cloudy
2 26-50% Cloudy
3 51-75% Cloudy
4 76-100% Cloudy
5 Overcast
Glare (Glare intensity)
0 No Impairment
1 Slight Impairment
2 Moderate Impairment
3 Severe Impairment
0 Clear
1 Mist
2 Light Rain
3 Heavy Rain
0 Poor
1 Fair
2 Moderate
3 Good
4 Excellent
0 No
1 Yes
0 No
1 Yes
Sun penetration (Sun pen)
0 Poor
1 Fair
2 Good
3 Excellent
0 Poor
1 Fair
2 Good
3 Excellent




This section explains attributes included in the original dataset. OBIS-SEAMAP restricts the attributes available to the public to date/time, lat/lon and species names/counts only. Should you need other attributes described here, you are encouraged to contact the data provider.

Attributes described below represent those in the original dataset provided by the provider.
All attributes are included in the downloadable file (CSV or ESRI File Geodatabase) for "Complete Set of Dataset".

Attributes in dataset

Attribute (table column)Description
oidUnique ID number (generated by OBIS-SEAMAP)
effortidEffort ID
oid_orgOID assigned by provider
typeSpecies group (turtle or mammal)
comnameSpecies common name
sp_tsnTaxonomic Serial Number added by OBIS-SEAMAP
individualcountNumber of animals sighted
latitudeLatitude in decimal degrees
longitudeLongitude in decimal degrees
perpendiculardistancePerpendicular distance to the animal
eventdateDate and time of the sighting in local time
transectTransect No.
beaufortBeaufort sea state
cloudcoverCloud cover code
glareGlare code
weatherWeather code
conditionsOverall conditions code
hazeHaze presence
fogFog presence
sunpenSun penetration code
turbidityTurbidity code
tripidTrip ID
platformvltsAlways A (Airplane)
oneffortFlag (Y/N) to indicate on effort
observationheightAltitude of aircraft in feet above sea level
platformspeedPlatform speed in knots
sighttypeSighting type (always F)
datasetidDataset ID assigned by provider
datasetnameDataset name by provider
eventdatetimezoneTime zone
geomGeometry field added by OBIS-SEAMAP
Marine mammals254
Sea turtles665
Rays and sharks0
Other species0
Non spatial0
Non species0
Date, Begin2017-06-29
Date, End2017-08-17
Temporal prec.111111
Latitude24.40 - 30.38
Longitude-97.33 - -81.10
Coord. prec.5 decimal digits
Data typeAnimal sighting
EffortYES (ID: 1971)
Traveled (km)14,730
Effort hours75
Contr. through
Sharing policy CC0 no rights reserved
Shared with OBIS
GBIF (via DOI)
See metadata in static HTML
See metadata in FGDC XML
See download history / statistics