This blog is the second in a series called COG Talk, which looks at ways to use Cloud Optimized GeoTIFF, and why we use them. — The first post is a refresh on the COG format and announces the release of version 1.0.0 of rio-tiler and rio-cogeo. Here, we’ll see how we can use them to build mosaics for web maps. COG vs Map Tiles Cloud Optimized GeoTIFF files, as the name implies, are specifically designed for easily accessing remote…