Interactive imagesA map of temporal variability
A map of temporal variability
From step 4 of From time series to a map of temporal variability
The temporal standard deviation of every cell of the study window, computed with stars, beside the selected cell's monthly profile; a second view maps each cell's valid months, for each period.
Pick any cell of the map to see its monthly values and its score, switch to the count of valid months, and change the period.
Cell at row 148, column 199 · 2017–2018 · NIR08
Loading temporal-variability-stats-full.bin (1.0 MB).
Computed with stars in R, the same summary for every cell.
Temporal standard deviation
Fewer than 2 valid values
Observations of this cell
| Month | NIR08 | Counted in 2017–2018 |
|---|---|---|
| January 2017 | No valid value | No |
| February 2017 | No valid value | No |
| March 2017 | No valid value | No |
| April 2017 | No valid value | No |
| May 2017 | 0.2304 | Yes |
| June 2017 | 0.2227 | Yes |
| July 2017 | 0.2238 | Yes |
| August 2017 | 0.2309 | Yes |
| September 2017 | No valid value | No |
| October 2017 | No valid value | No |
| November 2017 | 0.3323 | Yes |
| December 2017 | No valid value | No |
| January 2018 | 0.2955 | Yes |
| February 2018 | No valid value | No |
| March 2018 | 0.2788 | Yes |
| April 2018 | No valid value | No |
| May 2018 | 0.2440 | Yes |
| June 2018 | 0.2275 | Yes |
| July 2018 | 0.2267 | Yes |
| August 2018 | 0.2407 | Yes |
| September 2018 | 0.1417 | Yes |
| October 2018 | 0.3011 | Yes |
| November 2018 | No valid value | No |
| December 2018 | No valid value | No |
Temporal standard deviation0.0476Mean of valid values: 0.245913 of 24 months have a valid value
What to try
- Find the largest spread. Look for the lightest cells and pick one, by click, tap or arrow keys. Does its profile swing between seasons, or does one month stand apart?
- Switch to valid months. Choose Valid months: each cell’s count of months with a valid value. Is a large spread resting on many values or on few?
- Change the year. Choose a year under Period. The cell stays selected; compare its score and its count with the other year’s. A difference between years is not land-cover change.