[GRASS-user] question on Landsat 8 radiometric and atmospheric corr.

Veronica Andreo veroandreo at gmail.com
Fri Jun 14 09:06:46 PDT 2019


Hi Gabriel,

AFAIU, you have to put the basename only, i.e., only B if your files are
named B1, B2, B3 and so forth

HTH,
Vero

El vie., 14 jun. 2019 a las 11:01, Gabriel Cotlier (<gabiklm01 at gmail.com>)
escribió:

> Dear grass users,
>
> My question is regrading the preprocessing of Landsat 8 data.
> I have LC08_L1TP, level 1 Landsat 8 data product loaded in grass project
> and want to perform the preprocessing of these data sets.
> The procedure of turning DN to Radiance (radiometric calibration) by means
> of *i.landsat.toar *grass function, and thereafter turning obtained
> Radiance to Land Surface Reflectance (Atmospheric correction) by means of
> grass function *i.atcorr* to get final reflectance results by means
> different DOS methods to be further compared.
>
> I enter the data band
> [image: image.png]
> I entered the metadata
>
> [image: image.png]
>
>   I left these two following tabs as default settings
> [image: image.png]
>
> [image: image.png]
>
> and got this error:
>
> i.landsat.toar input=B4 at PERMANENT output=B4_radiance
> metfile=C:\Users\Gabriel\Documents\grassdata\LC08_L1TP_227083_20180315_20180320_01_T1\LC08_L1TP_227083_20180315_20180320_01_T1_MTL.txt
> sensor=oli8 date=2018-03-15 sun_elevation=45.06637424
> product_date=2018-03-20
> WARNING: ESUN evaluated from REFLECTANCE_MAXIMUM_BAND
> WARNING: Overwriting solar elevation of metadata file
> Calculating...
> ERROR: Unable to open header file for raster map <B4 at PERMANENT1@>
> (Fri Jun 14 10:52:44 2019) Command finished (0 sec)
>
> I would like to load and run this process for many bands at once but the
> GUI for this functions do not permit to input more than one band at once.
> Could be this done more efficiently by command line? Any suggestion for
> this preprocessing by command line or either by python scrip ?
>
> Thanks a lot.
> Gabriel
> _______________________________________________
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