Data · collection
NMML Small Cetacean (coastal) Aerial Survey 1998, Gulf of Alaska
Listed in NASA Earthdata CMR
Researchers from NMML's Cetacean Assessment and Ecology Program conducted the line transect aerial surveys for harbor porpoise and Dall's porpoise from 27 May to 28 July 1998 in the Gulf of Alaska (offshore waters from Cape Suckling to Unimak Pass), Prince William Sound, and Shelikof Strait.
Description
Surveys were conducted from a NOAA Corps DeHavilland Twin Otter, flown at an altitude of 152.5 m (500 ft) and an airspeed of 185 km/hr (100 knots).
Sawtooth lines were designed to cover the offshore waters from Cape Suckling to Unimak Pass (offshore of Kodiak Island) and included lines extending 15 nmi seaward, or to the 50 fathom line, whichever was farthest from shore and lines extending to the 1,000 fathom line. In Shelikof Strait a series of zigzag lines were designed between the Alaska Peninsula and Kodiak Island. Larger inlets and bays were also included in the survey.
Read the rest (2 more)
The survey in Prince William Sound consisted of two lines: one covering the central waters and one along the coast with extensions into selected inlets. Two primary observers surveyed from a bubble window on the left and right sides of the plane. An independent observer was positioned in a belly window.
This observer surveyed the trackline directly below the plane to record animals missed on the trackline by the primary observers.
Links
Get the data
- iobis.org /mapper/?dataset=2091 ↗
Access data from the OBIS and OBIS-SEAMAP websites.
download · from NASA CMR
- seamap.env.duke.edu /datasets/detail/116 ↗
Access data from the OBIS and OBIS-SEAMAP websites.
download · from NASA CMR
Documentation and papers
- VIEW RELATED INFORMATION seamap.env.duke.edu/prod/services/datasets/show_xml_metadata.php?datasetid=116 ↗
documentation · from NASA CMR
- seamap.env.duke.edu ↗
Ocean Biogeographic Information System - Spatial Ecological Analysis of Megavertebrate Populations (OBIS-SEAMAP)
documentation · from NASA CMR
- Biological Data Profile usgs.gov/core_science_systems/csas/metadata/standards.html ↗
documentation · from NASA CMR
- ArcGIS metadata format desktop.arcgis.com/en/arcmap/10.3/manage-data/metadata/the-arcgis-metadata-format… ↗
documentation · from NASA CMR
- Ocean Biogeographic Information System (OBIS) iobis.org ↗
documentation · from NASA CMR
- OBIS-SEAMAP Map Service seamap.env.duke.edu/search ↗
documentation · from NASA CMR
Catalogue records · 2
- CMR record cmr.earthdata.nasa.gov/search/concepts/C1214586434-SCIOPS.html ↗
catalogue entry · from NASA CMR
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C1214586434-SCIOPS.umm_json ↗
metadata API · from NASA CMR
Topics
- Stated by source
- Animals Vertebrates · DeHavilland Twin Otter · Fish
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C1214586434-SCIOPS | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/biological-classification/animals-vertebrates | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/biological-classification/animals-vertebrates/fish | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:dhc-6 | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| license_text | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |