NDVI Profile Tool Help

  1. You can type in the four-digit Landsat Path/Row (if known). In this example "2930", Landsat Path/Row over Sioux Falls, SD, was typed in.

    Figure 1. Screenshot of the NDVI Tool Landsat Path Row Entry.
    Figure 1. NDVI Tool Landsat Path Row Entry.

  2. Another option is to click on the map maker icon (highlighted in red).

    Figure 2. Screenshot of the NDVI Tool Map Maker Icon.
    Figure 2. NDVI Tool Map Maker Icon.

  3. This will bring up a map. Click anywhere in the conterminous US, and the correct Path/Row will be added to the Landsat Path/Row box. In this example an area near Sioux Falls, SD was clicked on yielding the Landsat Path/Row "2930".

    Figure 3. Screenshot of the NDVI Tool Map Click to Select Landsat Path and Row.
    Figure 3. NDVI Tool Map Click to Select Landsat Path and Row.

  4. You can now enter in the date (highlighted in red) of the event that you want to examine

    Figure 4. Screenshot of the NDVI Tool Date Entry
    Figure 4. NDVI Tool Date Entry.

  5. Either type in the date or use the calendar to select the date from the pop-up calendar

    Figure 5. Screenshot of the NDVI Tool Select Date from Calendar
    Figure 5. NDVI Tool Select Date from Calendar

  6. In this example, we decided to use the date of 7/1/2018.

    Figure 6. Screenshot of the NDVI Tool Date Entry
    Figure 6. NDVI Tool Date Entry Example.

  7. Click on "Submit"

    Figure 7. Screenshot of the NDVI Tool Submit Button
    Figure 7. NDVI Tool Submit Button.

  8. The NDVI graph with the 1-year pre-event and event image date will show on the graph. Note that the curve changes based on the vegetation that is being show.

    Figure 8. Screenshot of the NDVI Tool Graph 1-Year Pre-Event and Event Image Date
    Figure 8. NDVI Tool Graph 1-Year Pre-Event and Event Image Date

  9. You could also just pick one vegetation type by clicking on the vegetation types that you don’t want to examine.

    Figure 9. NDVI Graph Single Vegetation Type
    Figure 9. NDVI Graph Single Vegetation Type

  10. Or, you can select one vegetation type by selecting the NDVI Single Landcover class tab (highlighted in red)

    Figure 10. NDVI Graph Select Single Landcover Class
    Figure 10. NDVI Graph Select Single Landcover Class

  11. Selecting the NDVI Single Landcover class tab yields all years by one vegetation type.

    Figure 11. NDVI Graph All Years by One Vegetation Type
    Figure 11. NDVI Graph All Years by One Vegetation Type

  12. To show all years NDVI curves, click on "Show all" (highlighted in red).

    Figure 12. Screenshot of the NDVI Graph All Years NDVI Curves
    Figure 12. NDVI Graph All Years NDVI Curves

  13. All vegetation curves between 1989 until the present will be shown.

    Figure 13. Screenshot of the NDVI Graph Vegetation Curves by Date Range
    Figure 13. NDVI Graph Vegetation Curves by Date Range

  14. You can also move the date sliders (highlighted in red) to display NDVI data by a specific date range.

    Figure 14. Screenshot of the NDVI Graph Vegetation Curves by Date Range Slider
    Figure 14. NDVI Graph Vegetation Curves by Date Range Slider

  15. In this example we moved the left date slider to 2015 and the right date slider to 2017 to display the 2015-2017 NDVI data.

    Figure 15. Screenshot of the NDVI Graph Vegetation Curves by Date Range Slider Example
    Figure 14. NDVI Graph Vegetation Curves by Date Range Slider

  16. To look at the NDVI curves of adjacent Path/Rows, you can click on any of the six surrounding Path/Rows. In this example we will examine the NDVI graph for Path 30/Row 29 (highlighted in red).

    Figure 16. Screenshot of the NDVI Graph Curves by Adjacent Path Rows
    Figure 16. NDVI Graph Curves by Adjacent Path Rows

  17. You might want to examine adjacent Path/Rows if you’re determining whether you want to use pixels from overlapping scenes for you event mapping analyses. As you can see, the path/rows have similar NDVI curves suggesting that they could be used together.

    Figure 17. Screenshot of the NDVI Graph Curves by Adjacent Path Rows Example
    Figure 17. Screenshot of the NDVI Graph Curves by Adjacent Path Rows Example