Javier,
TIFFTAG_DATETIME or AREA_OR_POINT are copied by the COG/GTiff drivers
from the source dataset metadata.
So using gdal_translate / GDALTranslate(), you may set them with the
"-mo KEY=VALUE" option.
If using an intermediate VRT as the source for GDALCreateCopy(), then
you may call SetMetadataItem("KEY", "VALUE") on the VRT. I don't see an
option in GDALBuildVRT() to do that, but you can definitely open the VRT
after it has been created and call SetMetadataItem() on it
Even
Le 04/12/2023 à 16:14, Javier Jimenez Shaw via gdal-dev a écrit :
Hi
I am trying to convert a "normal" tiff file into a COG. For that I am
using an intermediate vrt file to add the geolocation parameters, and
finally copy the vrt into a COG.
I am doing it in C++, but it should be similar doing it on the command
line I hope. (In some cases I am using also other parameters of the
gdalbuildvrt).
My problem is how are the "magic words" to set the TIFFTAG_* (like
TIFFTAG_DATETIME) in the final COG. I guess I could use the option
"-oo" for the options in GDALBuildVRT, or in the options of the method
"CreateCopy" for COG driver.
Is that doable that way? Should I prefix "TIFFTAG_..." with something
like "GDALMETADATA:"? (I tried, unsuccessfully)
Is that the same for AREA_OR_POINT?
Thanks.
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