[R-sig-Geo] issue when opening raster image in R, the pixel values a rescaled somehow

[Victor F. Rodriguez Galiano]

Hi Roger, the link to he image is given below. This image was generated
from a .hdf file using the function gdal_translate.

gdal_translate(sds[1], dst_dataset=paste0(substr(filename, 1,
nchar(filename)-4) ,".tif", ))

https://wetransfer.com/downloads/4569e9a85c02faad5016b83d0b50217820200324084015/f2eafdfafaae74de9ac8e25017fc5cc520200324084015/e46e80


Thanks

Victor

El lun., 23 mar. 2020 a las 21:07, Roger Bivand (<Roger.Bivand using nhh.no>)
escribió:

> Please make the file in question available for download (url), or the url
> you downloaded it from (no login), on this list. It looks as though the
> unsigned 16 bit integer is not right.
>
> Roger Bivand
> Norwegian School of Economics
> Bergen, Norway
>
> ------------------------------
> *Fra:* R-sig-Geo <r-sig-geo-bounces using r-project.org> på vegne av Victor F.
> Rodriguez Galiano <vrgaliano using gmail.com>
> *Sendt:* mandag 23. mars 2020, 21.02
> *Til:* r-sig-geo using r-project.org
> *Emne:* [R-sig-Geo] issue when opening raster image in R, the pixel
> values a rescaled somehow
>
> I opened a Geotiff image in R using the raster function. However, the
> image seems to be rescaled. The minimum and maximum values should be 13607
> and 15461 but are 275 and 305. The Geotiff image when opened in a GIS is
> correct but not in R. This is my code: Script: library(raster)
> trial<-raster("MOD11A2.A2000049.h17v05.006.2015058135048.tif", datatype =
> "INT2U") trial plot(trial) [[alternative HTML version deleted]]
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