Indeed, good catch, I exported both of them to a new file and it's obvious now:
Laurentiu
On Thu, Feb 1, 2024, at 15:22, Even Rouault wrote:
> Hi,
>
> I don't think there's any problem regarding GDAL vs xarray. It is just a
> difference of convention on how GDAL and xarray choose the origin of
Hi,
I don't think there's any problem regarding GDAL vs xarray. It is just a
difference of convention on how GDAL and xarray choose the origin of
rasters. GDAL selects the northern-west corner as the (0,0) image
coordinate.
The line in GDAL that contains values 13.75 14.25 14.75 which are at
It's actually pretty easy to test:
import numpy as np
import xarray as xr
from osgeo import gdal
xarray_ds = xr.load_dataset("st4_pr.2017092016.01h", engine="cfgrib")
# GDAL uses as NODATA
xarray_data = np.nan_to_num(xarray_ds.tp.data, nan=.0)
gdal_ds = gdal.Open("st4_pr.2017092016.01h")
>From the R code snippet I see: "Surprisingly, the value 9.75 is shifted to
>106, 86 = 105,85 in Python indexing", but R is 1-base and Python 0-base. In R:
> library(terra)
terra 1.7.71
> gdal()
[1] "3.8.3"
> a <- rast("attachment.obj")
> b <- rast("st4_pr.2017092016.01h.tif")
> a
class : S
les are identical. All I
> can conclude is that gdal_compare and your R script are doing something in
> different ways.
>
> -Jukka Rahkonen-
>
> *Lähettäjä:* gdal-dev *Puolesta *Furuya,
> Takahiro via gdal-dev
> *Lähetetty:* torstai 1. helmikuuta 2024 1.53
> *Vastaanottaja:*
s.
-Jukka Rahkonen-
Lähettäjä: gdal-dev Puolesta Furuya,
Takahiro via gdal-dev
Lähetetty: torstai 1. helmikuuta 2024 1.53
Vastaanottaja: gdal-dev@lists.osgeo.org
Aihe: [gdal-dev] gdal_translate shifted values
Hi gdal-dev, I am Takahiro, a student who is using gdal_translate.
I have an issue with gdal
I'd check both files *before* all the processing. Something like:
gdallocationinfo -l_srs EPSG:4326 gribFile -110 40
gdallocationinfo -l_srs EPSG:4326 tiffFile -110 40
That will tell narrow it down.
On 1/31/24 15:53, Furuya, Takahiro via gdal-dev wrote:
Hi gdal-dev, I am Takahiro, a student
Hi gdal-dev, I am Takahiro, a student who is using gdal_translate.
I have an issue with gdal_translate and would like to ask a question.
I used gdal_translate to transform a NCEP GRIB file (downloadable from
https://data.eol.ucar.edu/cgi-bin/codiac/fgr_form/id=21.093, or attached to
this email) t
