License Information

License information

In the bottom right corner of the Tarkka’s Map Viewer the license information is visible in the correct format for the opened dataset or true-color image. The observations are available for usage as long as they are citated correctly.

License

The satellite observations offered by Syke are covered by the license for open data.

Source entries

The materials are produced by the Finnish Environment Institute’s (Syke) Quality of information and Digital services units. Satellite data interpretations are made using several instruments by NASA, NOAA and the EU Copernicus program Sentinel series. Sentinel-2 (ESA), Sentinel-3 (ESA), Landsat-8 (NASA) and TERRA MODIS (NASA) satellite instruments are currently used for observation. The NOAA-AVHRR (NOAA), AQUA / TERRA MODIS (NASA), ENVISAT MERIS (ESA), RADARSAT (CSA) and AMSR-E (NASA) instruments have also been used in the past. The ENVISAT MERIS and Sentinel-2 data have been downloaded from the Copernicus archive servers. Landsat-8 images and some AQUA MODIS data have been downloaded from NASA archives. The Finnish Meteorological Institute has received NOAA-AVHRR and AQUA / TERRA MODIS data.

Syke must be cited as a source if the datasets are used in publications or performances or otherwise made available to the public. When utilizing true-color images, the supplier of the original data must also be mentioned.

True-color images

The minimum requirements for citation (year is the observation year but date is recommended)

  • For true color images of Sentinel-2 and Sentinel-3: “Contains modified Copernicus data, Syke (year/date)”,

    • if there is room for longer text, use “Contains modified Copernicus Sentinel data, Syke (year/date)”,

  • for Landsat-8/9 true color images: “USGS/NASA Landsat Program, Syke (year/date)” or

  • for Envisat MERIS true color images: “Original data provided by the European Space Agency, Syke (year/date)”.

For Syke’s water quality data

  • Sentinel-2 based water quality data (surface algal blooms, turbidity, CDOM, Secchi depth): “Syke data, Contains modified Copernicus data (year/date)”,

    • if there is room for longer text, use: “Syke data, Contains modified Copernicus Sentinel data, Syke (year/date)”,

  • Landsat-8/9 based water quality data: “Syke data, USGS / NASA Landsat Program (year/date)”,

  • Sentinel-3 water quality data (surface temperature, surface algal blooms) “Syke data, Contains modified Copernicus data (year/date)”,

    • if there is room for longer text, use: “Contains modified Copernicus Sentinel data, Syke (year/date)”,

  • NOAA AVHRR based water surface temperature: “Syke data, original data NOAA AVHRR, Syke (year/date)”,

  • Envisat MERIS based water quality data: Syke data, original data provided by the European Space Agency, Syke (year/date)“ tai

  • Algae composite based on Aqua MODIS data: “Syke data, original data from NASA (year)”

For Lake Ice Extent data

  • Terra MODIS based data: “Syke data, Contains modified Copernicus data, Syke (year/date)”,

  • Sentinel-3 SLSTR based data: “Syke data, Contains modified Copernicus data, Syke (year/date)”,

    • if there is room for longer text, use: “Syke data, Contains modified Copernicus Sentinel data, Syke (year/date)”.

For references to scientific publications, more information is available from the support service: eotuki@syke.fi