Index Calculator

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The Index Calculator produces index maps very efficiently. The software will first produce a reflectance map for each measured band. Index maps can then be generated on a pixel-by-pixel basis.

How to create an NDVI Map

For example, producing an NDVI map requires the reflectance data for the red and NIR bands since NDVI = (NIR-RED)/(NIR+RED).


In order to generate an NDVI Map:

  1. On the Menu bar, click View > Index Calculator.
    image4.png

  2. In the section 3. Index Map, select ndvi (this requires the red and NIR reflectance maps to have been computed)
    image18.png
  3. Click Generate
  4. In the section 5. Export, click Export next to Colored Index Map (GEOTIFF) and GeoJPG (JPG).
    image7.png

  5. The exported Geotiff file can be found here: ...\project_name\4_index\indices\ndvi\
  6. (optional) Click Export next to Index Values and Rates as Polygon Shapefiles (SHP) with Grid Size [cm/grid] to export a prescription map. The .shp file can be found here: ...\project_name\4_index\indices\ndvi\

How to create a Region

A region enables the generation of Index Maps on an area of interest in the project. To create a region:

  1. On the Index Calculator sidebar, in section 2. Regions, click Regions. The Region List pop-up appears. 
  2. Click Add.
  3. (optional) Double click on unnamed to edit the name of the region.
  4. Click OK.
  5. Click on Draw to start drawing the polygon region in the Index View for the selected region name. image11.png
    In the Index View, left-click to place polygon vertices, and right-click to create the last vertex and close the polygon. Ensure that after drawing a region, the check mark appears beside the button Clear.
    image1.png

  6. (optional) Click on Regions... to display the area of the regions and the percentage each region occupies among all the regions.
    image8.png

 

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