In GIS this problem is known as "thematic map overlay".

On the screen, a map overlay appeared, labeled: crry re.

Goff pointed to a red circle with a dot in its center, drawn in grease pencil on the transparent map overlay.

A map overlay allows you the player navigate toward a sector.

A map overlay blinked on the viewscreen.

If this gully was going in more or less the right direction-" He'd obviously already looked at his map overlay.

So thorough was his plan that detailed orders and map overlays were ready by March 25.

Selectable map overlays include:

It's a train," the man replied at once, comparing the location with a map overlay.

Trencrom tapped on the buttons of the wrist-top keypad he wore, and a glowing digital map overlay of the entire building appeared.