Hello,
While transforming point coordinates from lat/lon to a specified
projection, I keep running into errors while trying to use some
projections. The line generating the error reads:
transform = osr.CoordinateTransformation(srs_in, srs_out)
For example, when defining "+proj=webmerc +datum=WGS84
Hello,
The following snippet works fine
# epsg = 54030
epsg = 4326
srs = osr.SpatialReference()
srs.ImportFromEPSG(epsg)
However, and when I switch epsg to 54030 (which I believe it's the value
for the Robinson projection), it generates the error:
File "/usr/lib/python3/dist-packages/osgeo/osr.py"
Please disregard this thread as the error is caused by dx and dy are equal
to zero (still need to check why the coordinates are resulting in these
values).
afernandez via gdal-dev wrote:
Hello,
I've upgraded QGIS from v3.30 to v3.34. However, and when plotting the same
raster layer, it i
Hello,
Please disregard my previous email (dx and dy are zeros). I apologize for
sending it in a rush as it clearly is bound to fail when dx & dy =0.
Sorry about it.
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Hello,
I've upgraded QGIS from v3.30 to v3.34. However, and when plotting the same
raster layer, it is now generating the error:
GDAL ERROR 1: Cannot invert geotransform
The geotransform value is (0.0, -3.88...e-11, 0, -6.402...e-10, 0, -0.0).
QGIS is listing the GDAL version as 3.4.1, which is al
Hello,
I'm generating a raster file with GDAL in QGISv3.30. The pseudo-code (with
the raster data loaded as 'var') reads:
dims = var.dimensions
shape = var.shape
driver_name = 'GTIFF'
driver = gdal.GetDriverByName(driver_name)
np_dtype = var.dtype
type_code = gdal_array.NumericTypeCodeToGDALTypeCo
ut files.
Thanks for all your help,
Arturo
Laurențiu Nicola via gdal-dev wrote:
Hi,
Try saving the output into a new file. Those are "creation options".
Laurentiu
On Thu, Jun 1, 2023, at 20:34, afernandez wrote:
Hello Laurentiu,
The color palette is working fine. The issues seem to be cau
ation or
use the COG driver (it's a subset of GTiff)
finally, you can use a lossy compression format like JPEG or LERC, but it's
probably not what you want
Regards,
Laurentiu
On Thu, Jun 1, 2023, at 17:35, afernandez wrote:
Hello,
I'm generating a raster file with GDAL. The pseudo-code
u can skip the whole python debacle and try this:
gdal_translate -f COG -co COMPRESSÞFLATE -scale 0 255 -ot Byte source.tif
target.tif
On 6/1/23 07:35, afernandez wrote:
Hello,
I'm generating a raster file with GDAL. The pseudo-code (where the > raster
is loaded as 'var') for th
Hello,
I'm generating a raster file with GDAL. The pseudo-code (where the raster
is loaded as 'var') for the colored version reads:
# Initial manipulations
dims = var.dimensions
shape = var.shape
driver_name = 'GTIFF'
driver = gdal.GetDriverByName(driver_name)
np_dtype = var.dtype
type_code = gdal
thout
GDAL support. However, it always ends up with the same problem. The error
message suggests an invalid argument, but I just don't know why this would
happen when KEA is loaded versus when it's not. [Info: the system is
running Ubuntu 22.04
v3.6.2. suffices for my purposes but it's obviously something to check. Thanks.
Even Rouault wrote:
Le 16/02/2023 à 03:04, afernandez a écrit :
The problem doesn't seem to be about having 2 copies of PROJ as I checked. I
was able to compile v3.6.2 w/o this issue so it might be someth
n and that will avoid running this script. But the crash
indicates something fishy that might hit you at execution of your GDAL build
Le 16/02/2023 à 00:20, afernandez a écrit :
Hello,
I'm trying to compile GDAL from source in order to include the KEA components.
My attempt at compiling (co
Hello,
I'm trying to compile GDAL from source in order to include the KEA
components. My attempt at compiling (configured simply with cmake ..
-DCMAKE_INSTALL_PREFIX=/usr) failed towards the end with a segmentation
fault error, which I cannot figure out
...
[ 98%] Built target testlog
[ 98%] Build
from source?
[Info: the system is running Ubuntu 20.04 and it returns:
$ gdalinfo --version
GDAL 3.0.4, released 2020/01/28]
Thanks,
AFernandez
Even Rouault wrote:
Le 14/02/2023 à 18:46, afernandez a écrit :
Hello Even,
Thank you for the quick reply. I'll try using GDAL subdatasets later this
e file directories in the same file (mapped as GDAL
subdatasets), with one band per subdataset, by using the APPEND_SUBDATASET=YES
creation option.
Another option is to use the KEA format (specialization of HDF5) which supports
all the possibilities of the GDAL abstract data model.
Even
Le 14/
Hello,
I'm using the GDAL Tools plugin within QGIS to plot some raster layers. The
snippet reads:
driver_name = 'GTIFF'
driver = gdal.GetDriverByName(driver_name)
...
gdal_ds = driver.Create("my_arguments")
gdal_ds.SetProjection("my_projection")
gdal_ds.SetGeoTransform("my_geo_transform")
for band
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