Atlantic grey seal breeding colonies in Hay and Saddle Islands, Nova Scotia
Duke Marine Robotics and Remote Sensing Lab
Dataset credit
Duke Marine Robotics and Remote Sensing Lab
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Contacts
Role | Name | Organization | |
Primary contact |
Alexander Seymour |
Duke University Marine Lab |
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Data entry |
Ei Fujioka |
Duke University |
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Citation
Seymour, A., Dale, J., Hammill, M., Halpin, P and Johnston, D. 2017. Automated detection and enumeration of marine wildlife using unmanned aircraft systems (UAS) and thermal imagery. Scientific Reports. 7: 45127. Halpin, P.N., A.J. Read, E. Fujioka, B.D. Best, B. Donnelly, L.J. Hazen, C. Kot, K. Urian, E. LaBrecque, A. Dimatteo, J. Cleary, C. Good, L.B. Crowder, and K.D. Hyrenbach. 2009. OBIS-SEAMAP: The world data center for marine mammal, sea bird, and sea turtle distributions. Oceanography. 22(2):104-115.
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Abstract
These RGB mosaics and thermal indices of Atlantic grey seal colonies at Hay and Saddle Island, Nova Scotia, were collected by small unmanned aircraft systems (UAS). The mosaics and thermal indices were assessed by human analysts, who counted the seals in the mosaic and classified individuals as 'young of the year' or 'adult'. Concurrently, an automated detection and classification model was applied to the datasets and compared to human counts.
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Purpose
These datasets were used to assess Atlantic grey seal populations and to compare and test wildlife survey methods.
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Supplemental information
The downloadable shapefile includes TIFF images of RGB mosaics and thermal indices. The size of the zipped file is 1GB and may take a long time to download.
Within the dowloaded file, the 'Analysis Materials' folders contain point shapefiles of the seals counted and classified by human analysts. In addition, the folders contain the landscape masks that were applied to the thermal indices before running the automated detection models.
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References
Seymour, A., Dale, J., Hammill, M., Halpin, P and Johnston, D. 2017. Automated detection and enumeration of marine wildlife using unmanned aircraft systems (UAS) and thermal imagery. Scientific Reports. 7: 45127.
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Attributes
Overview
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.
Only minimum required attributes are visible and downloadable online. Other attributes may be obtained upon provider's permission.
Attributes in dataset
Attribute (table column) | Description |
oid | Unique ID number (generated by OBIS-SEAMAP) |
fid | Internal Field ID |
location | Location name |
obs_date | Date of the sighting |
obs_time | Time of the observation is not available |
x | x coordinate |
y | y coordinate |
series | Tag ID |
life_stage | Life stage (adult or juvenile) |
longitude | Longitude in decimal degrees |
latitude | Latitude in decimal degrees |
species | Species name recorded |
sp_tsn | Taxonomic Serial Number added by OBIS-SEAMAP |
obs_count | Group size (always 1) |
geom | Geometry field added by OBIS-SEAMAP |
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OBIS-SEAMAP ID | 1462 |
Seabirds | 0 |
Marine mammals | 3,355 |
Sea turtles | 0 |
Rays and sharks | 0 |
Other species | 0 |
Non spatial | 0 |
Non species | 0 |
Total | 3,355 |
Date, Begin | 2015-01-30 |
Date, End | 2015-02-02 |
Temporal prec. | 111111 |
Latitude | 45.81 - 46.02 |
Longitude | -63.25 - -59.68 |
Coord. prec. | 6 decimal digits |
Platform | Plane |
Data type | Animal sighting |
Effort | N/A |
if ($show_effort_stat) {
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Traveled (km) | 0 |
| 0 |
}
if ($sources != null and $sources != "" and $dataset_id != 427) { // Do not show ESAS
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Contr. through | |
}
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Registered | 2017-02-14 |
Updated | 2017-02-20 |
Status | Published |
Sharing policy |
CC-BY-NC (Minimum) |
Shared with |
OBIS
GBIF (via DOI) |
See metadata in static HTML |
See metadata in FGDC XML |
See download history / statistics |
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