Demonstration 01
Changing basemaps
The same county data sits on top of whichever basemap you choose. A basemap sets the visual context — terrain, satellite imagery, or a plain street grid — without touching the data drawn over it.
County overlay: 2020 U.S. Census, Hawaiʻi Statewide GIS Program (public domain).
Try each basemap: the coral county outlines stay put while the world
beneath them changes. That separation — data layer versus basemap — is the
foundation of every web map.