1. Help Center
  2. Frequently Asked Questions

New users: what to look for in your TerrAvion imagery

Tips for new TerrAvion users

For users new to TerrAvion, using the program and knowing what to look for can be a little overwhelming at first. Luckily, we have a large repository of helpful information to help you get comfortable using our product. Please visit help.terravion.com and use the 'Search' bar to search for information on any questions you may have.

Some helpful pages for new users include:

Navigating The New OverView Interface: YouTube video

How To Use The TerrAvion Mobile App; YouTube video

Choosing an NDVI Colormap

Choosing The Right Internet Browser

What To Look For In Your TerrAvion Imagery

Identifying Disease and Pest Infestation

One way that growers take advantage of imagery to maximize their profits is by using it to identify diseased or insect-infested areas to target for chemical treatments. Disease and pest damage causes visible damage to crops, and the crop will not grow as vigorously. This damage can usually be identified with the naked eye, but growers don't have the time or resources to walk every row of their fields to look for disease and or insects. The resolution of TerrAvion imagery is high enough (10cm/pixel) that you can use it to spot pest and disease problems in your fields early enough to make an effective treatment. Damaged areas will often show themselves as low vigor in the imagery. Below, you see a cornfield that has a history of nematode problems. The grower planted a nematode-resistant seed variety in the east side of the field, and a non-resistant variety in the west side. You can see the damaged areas on the west side of the field. They show themselves as low vigor areas.





The above image is an NDVI image with the Granular color-map. To change colormaps, click on the color scale in the bottom right-hand corner of your screen. The color scale will only show itself if you have the Vigor layer selected. For more information on how to choose a colormap, click here.

Here is what the damage looks like in the natural color image:



While all disease and pest infestation cases are unique, this is generally what you should look for in your imagery; irregular patterns of non-uniform growth.

Irrigation Failures

TerrAvion’s Thermal imagery is a great tool to spot irrigation failures in your fields. The pivot shown in the image below has a few emitters that are clogged. Water shows up as a cooler temperature in thermal imagery, and spots that are not receiving water, such as those under the clogged emitters, will show up warmer. Here you can see the circle areas, where the emitters are clogged, sticking out as warm rings in the imagery. Irrigation failures will oftentimes become obvious in the thermal imagery weeks before you can see the effect taking place in the natural color image or vigor image.




Variable Rate Applications

Many growers use their TerrAvion imagery to make variable rate input applications. Using the polygon tool, you can select an area of your field that you would like to create a specific prescription for. In the image below you see a cotton field. The highlighted area had previously been planted with corn, and the soil there has higher nitrogen rates than the rest of the field. This area is growing more vigorously than the left side of the field, but the grower needs the field to grow uniformly. This grower selected the area and downloaded the SHP file for this area. He then imported it into his variable-rate prescription program and made a PGR application to just this area.



Below is the NDVI imagery before the PGR application.




The below image, taken a couple of weeks later, shows that the PGR application was successful in creating more uniform growth throughout the field.


Monitoring Test Plots/Seed Varieties

TerrAvion imagery is a great tool for the evaluation of seed varieties in your fields. In the image below, you see two fields, each planted with a different variety of corn. The field on the right also has a test plot planted in the south end of the field. You can see that the field on the left is growing more vigorously than the field on the right.




In the below image, you can see that the test plot in the field on the right is growing much more vigorously than the rest of the field.



Below is the natural color image for the fields. You can see that while there are some of the same variations noticeable, it's much easier to quantify the growth of both fields in the vigor/NDVI imagery as shown above.


For more use case examples on how growers use TerrAvion imagery, visit specific crop use case pages at help.terravion.com, or contact support@terravion.com.