but the question I have is whether a vector layer were saved to
something like a GPKG would the timezone even be preserved?
Short answer: not by default
Longer answer:
- see https://github.com/opengeospatial/geopackage/issues/530
- and https://github.com/OSGeo/gdal/issues/3423#issuecomment-772405674
- and https://gdal.org/drivers/vector/gpkg.html#dataset-creation-options
So basically:
- the GeoPackage spec only supports date/time encoded as ISO 8601 with
Zulu timezone : "YYYY-MM-DDTHH:MM:SS.SSSZ"
- on reading side, the OGR Geopackage driver can understand non-Zulu
timezones
- on writing side, by default the OGR Geopackage driver will convert
datetimes to the Zulu timezone (applying the appropriate shift), unless
the DATETIME_FORMAT=WITH_TZ dataset creation option is passed at
creation time, in which case the original timezone is preserved. Such
datasets may not be read correctly by third party implementations.
Even
http://www.spatialys.com
My software is free, but my time generally not.
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