[gdal-dev] Space Disk/Memory of Image

[Elena Ruiz]

Hello, I need to know the disk size of an image, I calculate it using the following formula:

Disk size=( sizex*sizey*bits per pixel)/8 =memory size without compression

But when the image is compressed on disk it occupies less and the size in memory is much larger, is there some method in the C++ GDAL API, to obtain the size on disk, size on memory, or the compression factor?
Example:
SizeX: 60416
SizeY:38656
Bits per pixel:24

Size memory= (60416*38656*24)/8=7.006.322.688 bytes
Size disk=2.137.644.631 bytes

The format image is COG - Cloud Optimized GeoTIFF generator, and has JPEG compression

Thanks and regards
________________________________

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Elena Ruiz
Sofware Development & Technical Support
Tel. +34 952 43 97 71
eruiz at aplitop.com
Sumatra, 9 - 29190 M?laga (Spain)
www.aplitop.com

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