The OBIS-SEAMAP web site provides a variety of tools to explore, map and download survey data for marine mammals, seabirds and sea turtles collected from data providers across the globe.
This online help overviews the basic use of the OBIS-SEAMAP Search Interface.
Before continuing reading this help, first be familiar with how to get more help. Each of the query tools and functions in the Interface has its detailed help that you can view by clicking '?' icon . The online help is initially displayed within the Search Interface. If you want to see it in a larger window, you can resize the help window or load it in a browser's new tab or window by clicking the pin icon at the upper right corner of the help window.
There are three variations of access to the Search Interface that result in different URLs and slightly different usage and functionality.
1. Advanced Search Interface
The Advanced Search Interface builds the foundation of the data exploratory tools for the OBIS-SEAMAP data.
The other two variations function as particular cases depending on your interest.
2. Dataset Page
If you are interested in a particular dataset, the Dataset Page gives you the quickest access to the information and data of the dataset. The Dataset Page loads its data and presents its metadata automatically.
This is convenient if you are a data provider and want to have a direct link to your dataset.
The URL of the Dataset Page is:
where dataset_id is the Dataset ID, a numeric identifier of the dataset, which you will need to know in advance.
If you don't know the Dataset ID, the quickest acceess to the Dataset Page would be to look into "Browse Datasets" section on the front page. The datasets are grouped by the data providers. You can also find datasets that include observations of a particular species. Once you found your dataset of interest, click the name of the dataset that brings you to the Dataset Page.
3. Species Profile Page
If you are interested in a particular speceis, the Species Profile Page gives you the quickest access to the information and data of the species. The Species Profile Page loads its data and presents the species profile compiled by OBIS-SEAMAP automatically.
The URL of the Species Profile Page is:
where itis_tsn is a taxonomic serial number organized by the Integrated Taxonomic Information System (http://www.itis.gov).
If you know your species or datasets of interest, the Quick Search at the top gives you the quickest way to extract data that you are looking for. The Quick Search box accepts the following names or words and returns the matched species or dataset. It is equipped with live search functionality that dynamically searches the database as you type in (the live search is enabled at three letters or longer).
The Quick Search returns the matched items with the headline of the category such as 'Species found', 'Datasets found', 'Datasets from Matched Providers', so you know what kind of data are found in the OBIS-SEAMAP database.
By clicking the dataset or species you are interested in, it is added to the search criteria and displayed in the Dataset or Species Selection panel. Then, the map is updated to show the data of your selection.
Full text search
The Quick Search has a powerful option to look into the metadata of datasets and species with a word or phrase you are interested in.
By simply turn on [Full text] option, the search tries to match your keyword with the following metadata elements:
By default, the map displays the gridded summary of the data extracted. This gives you a quick view of the spatial distribution of the data. The summary represents one of the following counts or indeces color-coded by that count at a specific resolution with the number of records being default.
To change the count type, click the icon to the Summary layer and press one of the six count type buttons in the dialog that comes out.
To see the legend of the colors, click the Legends button at the lower right corner of the Interface.
The summary's spatial resolution changes according to the current Google Maps zoom level as below.
|0 - 4||1 degree|
|5 - 9||0.1 degree|
|10 -||0.01 degree|
You can also fix the resolution at one of the above three available resolutions. See the online help for the Layer selection panel for more details.
The points layer renders individual ovservation records as points on the map. Since the number of points can be huge (e.g. 100,000 points), it may take a few minutes to map all. You can switch between the gridded summary and the points layer anytime by choosing one of them in the Layer selection panel. The points layer is not available when no criteria are set up (you can't see all the OBIS-SEAMAP data as points at once), though.
Points are rendered with symbols based on the data type. For example, visual sightings collected from a vessel or airplane survey is rendered with a filled circle. Telemetry locations from a tagged animal are given a triangle. Points are given the same colors per dataset, species or individual animals. You can choose one of them by clicking the icon to the Points layer and press one of the three option buttons in the dialog that comes out. If you chose 'Individuals', the observation records that are not identified to an individual (this is useualy the case for vessel or airplane visual sightings) are given red.
To see the legend of the point symbols and colors, click the Legends button at the lower right corner of the Interface. At this moment, you can't change the colors, which will be a future improvement.
OBIS-SEAMAP provides flexible and powerful data download features. You can download data in the following formats:
For more details, see Download OBIS-SEAMAP data