The OverView interface is the desktop app for viewing your TerrAvion imagery.
1. To view your imagery, first go to maps.terravion.com to login to your account.
2. Once you've logged in, the first thing to note is the Farm and Field index on the left side of the screen. Users can sort the imagery on their account by farm, farmer, or agronomist. This feature allows for users with many farms and fields on their account to view them in an organized manner. There is also a search bar which allows users to search for a specific farm, farmer or agronomist. At the top of the menu, you can filter your fields by year and/or crop type.
2. Select a farm to see all of the fields for the farm in the viewing area. Viewing you fields on the farm level allows you to see relative changes across all the fields on that farm.
3. As you hover your mouse over a field name in the index, that field will be highlighted in the main viewing area.
5. When you select a field, a timeline will appear towards the bottom of the screen. The timeline will display all the dates for each image delivery you have for that particular field.
5. There is a slideshow option for your images to the right of the timeline. If you click the play button, your field images will play through like a slideshow. You change the speed of the slideshow by clicking the left or right arrows on the tool.
6. Next, note the toolbar at the bottom of your screen. Here you can alter the viewing settings for your imagery.
7. From left to right, you will first see the Farm and Field name and the time and date that the selected image was captured.
8. Next you will see the USDA SURRGO Soil Map button. Clicking on this bottom will overlay a soil map layer over the map layer you have selected.
9. To the right, you will find the map layer menu where you can select your map layer. When you select the vigor layer, you will see the vigor color scale appear. Click on the color scale to change vigor color-maps.
10. To the right of the layer menu you will see the More button. Here you have the ability to label your field by crop, review your order, download the GeoTIFF file for your field, view the statistics table, report a layer issue or download a PDF summary of your field.
11. To the right of the More menu you will see the mouse-over value indicator, which tells you the exact RGB, Vigor or Thermal value at the tip of your mouse.
12. TerrAvion users are provided with four map layers for each image they receive; a natural color layer, an infrared layer, a vigor or NDVI layer, and a thermal layer. The natural color layer is simply a high resolution RGB image of your field. The infrared layer is a great tool for monitoring soil variations in your fields, and you can use the USDA SURRGO soil map feature for added context. The thermal layer can be used to monitor irrigation programs. Water stressed areas will often show themselves as hot spots, while irrigation leaks can be detected by looking for cold spots. The vigor, or NDVI layer, is a vegetation index that indicates general plant health and/or plant stress. NDVI data is a ratio between infrared and color imagery light reflectance that conveys photosynthetic active in plants. A fifth layer, the Zoning layer, groups together areas of like vigor to show zones of different vigor levels. The Zoning layer provides the viewer with NDVI information in a less busy, easier to read image. Together, the data these layers provide give users a comprehensive understanding of what is happening in their fields.
12. On the toolbar at the top right side of the screen, you will find the histogram button along with the polygon tool button. Click the histogram button to see a NDVI or thermal histogram of your field. Use the polygon tool to select an area to download, share, to make notes on or to see a histogram for.
2. At the top of your screen on the left, click on the Summary View button to see a summary of your fields. Here you can see each map layer for a single field displayed in one window. Viewing each layer together in one window provides users further context while studying their fields. Toggle on the histogram button at the top right side of the page to see the vigor and thermal histogram for you field. Use the left or right arrow keys on your keyboard to cycle through image dates.