The glare image shows glare sources in yellow and also shows the calculated DGP value, this is extracted from the "glare data" file, in the bottom-left corner. The sky conditions used for the source image is shown in the bottom-right corner.
The DGP is shown as a percentage of people who would be satisfied and the following ranges are displayed on the image -
Imperceptible = less than 35%
Perceptible = 35% - 40%
Disturbing = 40% - 45%
Intolerable = greater than 45%
If the "glare data" file does not exist (deleted by user) or cannot be parsed then a DGP value of -1.0 is shown with the label "unknown" (the analysis should be rerun manually, see 3.2 above) -