COG (Cloud Optimized GeoTIFF)

A GeoTIFF organized for HTTP range requests so clients can stream only the parts they need.

Category: Files & Data · Also known as: Cloud Optimized GeoTIFF

Definition (expanded)

COGs are GeoTIFFs structured with internal tiling and overviews so cloud clients can request just the necessary bytes. This enables fast map previews and scalable processing without downloading the full file.

Related terms

GeoTIFFA TIFF raster image format that can include georeferencing, commonly used for satellite and aerial data.XYZ tilesA web mapping tiling scheme where map images are requested as /{z}/{x}/{y}.png (or similar).