Is a 512x512 file without internal overview a proper COG ?

[vincentsarago]

Hi, I'm a bit confused by the language used in

gdal/gdal/swig/python/samples/validate_cloud_optimized_geotiff.py

Lines 90 to 100 in 4baca75

	if main_band.XSize >= 512 or main_band.YSize >= 512:
	if check_tiled:
	block_size = main_band.GetBlockSize()
	if block_size[0] == main_band.XSize and block_size[0] > 1024:
	errors += [
	'The file is greater than 512xH or Wx512, but is not tiled']
	if ovr_count == 0:
	warnings += [
	'The file is greater than 512xH or Wx512, it is recommended '
	'to include internal overviews']

This might be a special case but I have a 512x512 file without internal overview nor internal tiles (because my profile has default 512x512 tile size) and thus the script is not considering my file as a proper cog and telling me the file is greater than 512x512 which it isn't the case

IMO we should replace the >=512 bit >512 in L90.

[vincentsarago]

edits:
The scripts tells the file is a proper COG (🤦‍♂️) but warns about not having internal overview

The following warnings were found:
 - The file is greater than 512xH or Wx512, it is recommended to include internal overviews

output.tif is a valid cloud optimized GeoTIFF

[rouault]

I'm fine with a PR fixing this warning. > 512 looks good to me