FieldAgent Web: Accessing Satellite Imagery

FieldAgent Web - Accessing Satellite Imagery

Satellite map layers are now clipped to the field boundary!

This allows for the histogram of NDVI or NDRE values within a field to be shown. This also allows for the map to be displayed in a High Contrast (Equal Area) view.

Accessing Satellite Imagery

Most FieldAgent subscriptions include access to satellite imagery products.  The instructions below detail the process for accessing Sentinel satellite data.  Sentinel is operated by the European Space Agency.  The process for locating and using other imagery sources within FieldAgent is similar to the process below.

Where To Locate Imagery

Log in your FieldAgent account via the web app:

Within your account, select the field of interest and drill into it.
Next, select the layers button next to Map Layer to select imagery.

Deselect the highlighted drone icon and select the satellite icon to highlight in green.  This filters to only show satellite data.  The type of image (NDVI, RGB, and others) and the collection date are displayed.  Some systems provide an estimate of the cloud cover in the imagery, but not all constellations support this filter.

Scroll to find the date you wish to view satellite imagery for.
Tip: Try to find days with very high sunshine percentages. Higher sunshine percentages mean less cloud cover and better data. 
Select all the datasets you wish to view and compare.

Scroll to the top and select the "Back" arrow to return to the field page where your selected map layers will now be listed.

How to Adjust Imagery 

Now you can work with the satellite imagery just like any other data or image layer in FieldAgent.
You can change the stacking "Z" order of the layers by dragging map layers up and down to the top (front), and select the hide/view controls to view and compare different layers.

It's also possible to change colormaps and rendering tools for many product, and manage opacity of layers.  Select a layer to manipulate the coloring used as shown below.

How To Utilize Imagery

Satellite Imagery is a good way to monitor your fields no matter where you are. They can be a routine check in, or used in response to a FieldAgent Notification. Satellite images may be able to detect and diagnose the conditions in your field. If you're still curious about what's happening in your field, you can use satellite images to pinpoint areas for drone or ground scouting. 

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