Within the Seasonal Analysis Topic, GDA has added new derived variables to help analyze the NDVI time-series for a particular administrative unit location and crop type. These frequency variables show the percentage of pixels for a given MODIS NDVI composite value that are within NDVI ranges:
- 0.0 – 0.1
- 0.1 – 0.2
- 0.2 -0.3
- …
- 0.9 -1.0
These variables can show the spatial frequency spread of pixel values for additional breakdown analysis on top of the previously existing NDVI average value. These variables are currently limited to the United States district level NDVI.