[gdal-dev] Strange behavior opening CSVs

[Rahkonen Jukka (MML)]

Hi,

The trial with gdalinfo makes GDAL to try XYZ https://gdal.org/drivers/raster/xyz.html?highlight=xyz. It is not a bad guess at all. Ogrinfo tries CSV and finds the x, y, and val fields. I can’t say anything about the second part.

-Jukka Rahkonen-

Lähettäjä: gdal-dev <gdal-dev-bounces at lists.osgeo.org> Puolesta Simon Eves
Lähetetty: tiistai 9. marraskuuta 2021 2.21
Vastaanottaja: gdal dev <gdal-dev at lists.osgeo.org>
Aihe: [gdal-dev] Strange behavior opening CSVs

I am currently implementing a better file identifier, and during the course of development, I unintentionally let GDAL try to GDALOpenEx() the attached trivial CSV file.

First, it reported "Ungridded dataset: At line 3, change of Y direction" (as a warning to the registered error-handler) and the returned OGRDataSource* was null.

When I tried again, it then claimed that I was trying to open the same file recursively. implying that it had, in fact, opened it, even though it never returned a valid handle, so I wouldn't have been able to close it again even if I'd wanted to.

I can reproduce the first part with gdalinfo.

This is with GDAL 3.2.2 on Ubuntu 20.04 with GCC 9.

I'll poke at the GDAL code myself when I have a bit more time.

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