Is it correct that images (TIFF 8-bit, B2, B3, B4 bands, sentinel-2 L2A, high resolution) downloaded from sentinel-hub have very poor range of values? Min value is about 30 and max value is about 60 for some bands.

Shouldn't histogram be wider or it's normal for Sentinel data with atmosphere correction? Nir band has wider range of values. (Note: region of interest has forest cover; summer period; clouds 0%)

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  • When you retrieve the data, how do you go about it? Data from Sentinel Hub can be retrieved in numerous ways, and some of them are not intended for data analysis. Jun 17 '19 at 11:53
  • could you please tell if your data is L2A (level 2A, with atmosphere correction) or S2A (Sentinel-2A, name of the satellite) and L1C (non atmospheric correction). It seems that your data is in 8bit, so this looks like a quicklook and not the raw image.
    – radouxju
    Jun 17 '19 at 12:04
  • @MikkelLydholmRasmussen, I downloaded "Analytical" images from EO Browser.
    – Lana
    Jun 17 '19 at 12:50
  • @radouxju, I tried both atmospheric correction and non atmospheric correction (L2A, L1C), and it seems that analytical data should be better than quicklook (I chose 8-bit in "Analytical" data type). I'll compare results with downloading, using other tools.
    – Lana
    Jun 17 '19 at 12:52
  • 1
    By choosing 8-bit, you've likely "asked" the system to provide you with data as reflectance values. Reflectances are usually a percentage, which would correspond reasonably well with your values, albeit they are rather high. In general, you should not go for 8-bit, as the sensor acquires data at higher radiometric resolution than that, and going down to 8-bit means that you loose information. Jun 17 '19 at 13:10

Perhaps this FAQ entry will reveal some information:

As @MikkelLydholmRasmussen, these numbers correspond to reflectance values. When visualizing true color imagery we (at Sentinel Hub) often multiply them with 2.5.

If you want to avoid this auto scaling you can use the API:

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