The histogram feature within FarmShots displays a numerical plant health value as it relates to a satellite image. This allows for a quick health analysis to determine what percentage and acreage of a field has a particular health rating. This can be used to save time in determining which fields need to be scouted first or potentially earning more money back through an insurance claim with the identified amount of acres within flooded fields.
There are a few ways to view histograms within FarmShots.
Histograms can be accessed from the Farms page. When viewing farms within the Card View, select the HISTOGRAMS button. When viewing farms within the List View, select the View Histograms button.
Once you click on the histogram button, it will navigate you to the histogram page. This page will display in the upper left of the screen that you do not have an image selected.
Select an image on the left hand side to view its histogram.
After you select an image, you will view a histogram for each image within the selected farm. In this example, we selected March 17, 2019. It is showing us the two fields that are within our Demo 1 farm.
Now we have the histogram displayed. This is displaying the NDVI values for each field. At the top of each graph displays the average NDVI value for that field. Notice within the first graph that our average value is 0.61. (Closer the value is to 1, the more plant health within the field. The closer the value is to 0, the less plant health within the field)
Hovering your mouse over one of the bars in the graph will display the percentage of that field that lands within a certain value.
In the above example, it is displayed that 33.7% of the West Field falls within an NDVI range of 0.61-0.64.
The satellite image index can also be changed. Instead of viewing the histogram with the NDVI algorithm, it can be changed to any of the other indices.
In the below example, the EVI index is selected. The histogram has now adjusted the plant health values for the EVI index.
From here, navigate to either the Farms page or to the the Farm Viewer for this particular farm.
To navigate back to the Farms page, click on Farms in the upper left of the screen.
To navigate to that farm within the Farm Viewer, click on the icon next to the farm name in the upper right of the screen.
Within the Farm Viewer, click on the graph icon next to the farm name to navigate to the histograms page.
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