True-color images

True-color images

True colour images of satellite observations illustrate various natural phenomena and changes in the environment. The formation of true color images is explained in Frequently Asked Questions → What are true color images?

The true-color images presented in Tarkka service are produced by a processing service maintained by Sinergise Ltd (Images originate from Sentinel Hub). Syke has created true-color imagery visualizations suited for Finnish light conditions to facilitate the observation of phenomena, especially those visible in optically dark waters.

True color images are available since 1982.

Sample images

Figure 1: Lake Ridasjärvi and annual macrophyte growth. On the left: in late May and on the right: macrophytes in August, the year 2018. Contains modified Copernicus data, Syke (2018).

True color images can be used to visually monitor the algal situation in lakes, especially those lakes that are rich in algae each year.