There's a good amount of map data published as Esri Tiled Map Services including [Global Fishing Watch maps hosted on ArcGIS Online](https://www.arcgis.com/home/group.html?sortField=modified&sortOrder=desc&id=4ae6ac43d7844b5aaca1f134da1de6a0#content). It would be great if we could add these to SeaSketch projects.