A cloud-optimized GeoTIFF (or COG) is a [[File Format|file format]] for [[Raster Data|raster data]] that consists of a header index and a several of 512x512 blocks that can be [[A cloud-native format allows partial reads|read on demand]] – basically a [[GeoTIFF]] with file organization for partial reads. It makes a good [[A cloud-native format allows partial reads|cloud-native format]], that includes overviews and enjoys great tool support.