Biogeographic data in the OBIS-SEAMAP database can be explored using the Advanced Search Interface
, a set of advanced mapping and visualization tools.
Biogeographic data are classified based on the data type and platform:
- Visual sightings: Vessel, aircraft or land-based
- Telemetry of tagged aminals
- Passive acousitc detections: Mobile or stationary sensors
- Sea turtle nesting (in association with the SWOT initiative)
The Advanced Search
allows you to find biogegraphic data that meet your taxonomic and/or spatio-temporal interests.
Criteria you can set up to extract data are:
- Multiple taxa of your interest at any ranks of the taxonomic hierarchy (e.g. species, genus, family, order, class).
- You can further specify whether or not to include branching taxa belonging to a parent taxon.
- Species conservation status based on the US ESA and IUCN Redlist.
- Multiple datasets of your interest
- Regions of interst or your study areas. A region can be drawn online in a rectangle or polygon shape. Even in a circle shape.
- Biogeographic (e.g. Large Marine Ecosystems [LME]) or jurisdictinal (EEZs) regions.
- You can also extract data beyond those regions (e.g. species occurence beyond EEZs)
- Temporal ranges at various scales (e.g. year, year and month).
- Months or seasons
- You can combine a time series range and months of your interest (e.g. summer months from 1990 to 2000).
- Hours. This is particularly useful to observe animals' diel behaviors. Again, this criterion can be combined to other temporal criteria.
- Associated oceanographic variables including sea surface temperature, sea surface height, sea surface Chlorophyll-a
Once you set up your criteria, the occurrence data are mapped and the summaries (e.g. #records, #species etc) of the extracted data are presented. you can find:
- What species are found
- What datasets contribute to the occurence data
- Spatial distribution of the extracted data
- Temporal distribution of the extracted data
There are two types of layers to map the extracted data:
- Distributions of the data aggregated by unit cell at three spatial resolutions (1/0.1/0.01 degree)
- Individual records as points
The dataset or species page on the OBIS-SEAMAP web site can be accessed via a direct link to these pages.
All you need to know is the dataset id or species ITIS taxonomic serial number.
Dataset IDs or species TSNs are found at various ways/places including
non-interactive Species List
or Datasets List.
- Direct link to a Dataset Page: http://seamap.env.duke.edu/dataset/dataset_id
where dataset_id is the dataset ID.
- Direct link to a Species Profile Page: http://seamap.env.duke.edu/species/tsn
where tsn is the ITIS taxonomic serial number of the species.
While the above links take you to the interactive web page for more exploration, there are static versions of the page.
- Link to a static Species Profile Page: http://seamap.env.duke.edu/species/tsn/html
- Link to a static Dataset Page (in HTML format): http://seamap.env.duke.edu/dataset/dataset_id/html
- Link to a FGDC-compliant metadata page (in XML format): http://seamap.env.duke.edu/dataset/dataset_id/xml
- Link to a FGDC-compliant metadata page (with a nice style): http://seamap.env.duke.edu/dataset/dataset_id/xml/xsl
- Link to a GCMD DIF metadata page: http://seamap.env.duke.edu/dataset/dataset_id/dif
OBIS-SEAMAP supports OGC (Open Geospatial Consortium) web services such as WMS, WFS and KML.
Although OGC is the international standards, there are inevitably a lot of so-called vendor-specific rules on actual uses.
Most typical usage of the OBIS-SEAMAP OGC services is to request a OGC service for your species or dataset of interest.
It's a good idea to start with obtaining the capability document. The following URLs return the very basic OGC capabilities of OBIS-SEAMAP.
Looking through the capability document, you will probably wonder how to get a WMS image of a specific dataset or species.
This is where the vendor-specific parameters come to play a role.
First thing you would like to try is to add 'wms' or 'wfs' to the direct link for a species or dataset mentioned above.
For example, for Kogia breviceps (pygmy sperm whale),
Still you will have a lot of questions to make best use of the OBIS-SEAMAP OGC services. For example, how to zoom in to the extent of the dataset on a WMS image; how to add continents to a WMS image; how to limit WFS results within your study area etc.
'OBIS-SEAMAP OGC services (coming soon)' page gives you the full details.
Note that as the OBIS-SEAMAP data tend to be huge even for a particular species/dataset, you'll experience performance issues on OGC services
Therefore, it's recommended that you utilize the OGC services through the online pages rather than directly entering the service URL into your browser. The online pages are designed to deal with time-out issues inherit to browsers.