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This is the CoastWatch data portal.

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The data portal is a web-based platform that ...

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provides easy access to global and regional satellite ...

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data for use an understanding,

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managing, and protecting ocean and ...

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coastal resources.

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This tutorial will demonstrate how to access the data ...

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portal, download data sets, and more.

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The data portal can be accessed via the website,

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or by typing coastwatch.noaa.gov

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and clicking on the CoastWatch data portal link.

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The first step to accessing data portal data sets is to ...

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select a date from the date calendar panel,

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and click apply.

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The selected date will show at the top right-hand side of the screen

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as the reference date.

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Anytime the date is adjusted using the calendar,

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the apply button must be used.

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The date calendar panel can also be used to select a ...

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range of dates.

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To load a dataset, first select a desired date ...

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then click the check box of the dataset to visualize.

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The default layer is Gap-filled Chlorophyll-a and needs to ...

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be switched off before selecting another layer.

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Each dataset has its own icons for specific actions.

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Clicking the star icon will add the dataset to the active layers panel.

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Any layer added to the active layers panel will persist even ...

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if a new date is selected.

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Clicking the gear icon will show the layer tools.

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Layer tools allow for the adjustment of pallet,

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data range, and opacity.

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To load an L1 or L2 type dataset,

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select a range of dates,

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then click on L1/L2 Spatial Search.

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Click polygon and draw a region.

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Search results contain data for the selected region.

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The information icon will show the available time ...

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range, coverage,

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and metadata for the dataset.

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Adding two or more data sets to the active layers panel ...

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makes a dataset persistent, allowing comparisons of data ...

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from different dates.

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Here I will compare the sea surface temperature of 2 ...

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days: June 1st 2021 and January 1st 2021.

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Active layers can be dragged into a display order.

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Clicking the eye icon will hide a layer from view.

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Clicking the icon again will make it reappear.

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This makes it easy to compare data between two ...

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different dates.

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Downloading a dataset can be done by clicking the download icon.

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By default the global dataset is retrieved.

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A user-drawn region can also be used for subsetting data.

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This helps users find datasets

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from a desired region.

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Datasets can be added to the shopping cart by clicking the ...

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cart icon under each set.

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The first use will prompt for user settings.

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If you would like a global dataset,

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click on Global coverage. If you'd like a user-defined ...

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region, click User-defined.

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Clicking on the shopping cart icon provides two download options.

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The first is to download the file containing the URL list.

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The second is to download the actual data files.

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To view reference layers click on the reference layers panel ...

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then select the layers you wish to view.

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Clicking the blue information icon shows the source ...

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information for the imagery and the reference layers.

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Thank you for watching this CoastWatch data portal tutorial.

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If you have any questions you're welcome to contact ...

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NOAA CoastWatch at coastwatch.info@noaa.gov.