Mike,
there are a number of situations where you can get a Dataset not linked
to a driver. Code expecting a Dataset as input should be robust to it
having a null driver.
In your situation, given that small_world.tif is a multiband dataset,
but AsMDArray().AsClassicDataset() returning a single band one, having
GetDriver() report the GTiff driver would not match the expectation that
if Dataset.GetDriver() returns a non null pointer ,then
Dataset.GetDescription() can be passed to GDALOpen() and returns a
dataset that is identical to it.
Even
Le 22/07/2025 à 05:04, Michael Sumner via gdal-dev a écrit :
Hi, this is new to me - casting from MDIM results in a dataset with a
null driver:
ds = gdal.Open("../gdrivers/data/small_world.tif")
ds.GetRasterBand(1).AsMDArray().AsClassicDataset(0,1).GetDriver()
(stupid question: )
It makes sense to me for GTiff which has no MDIM capability, but how
then does the work get done?
I noticed by going from truly MDIM netcdf to AsClassicDataset() - I'd
expected that the NetCDF driver was still involved.
Does this mean we just have to test for null driver and report <none>
in that case generally?
Thanks, Mike
--
Michael Sumner
Ordinary Member, Streets People Love Hobart Association
Research Software Engineer
Australian Antarctic Division
Hobart, Australia
0438489030
e-mail: mdsum...@gmail.com
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