small-scale map; large-area map
A map covering a wide area with less detail, as opposed to a detailed map (詳細地図). Used in geography, navigation, and planning contexts.
See also: 詳細地図
Check the overall route on a small-scale map.
This small-scale map only shows major roads.
詳細地図 is a large-scale map showing fine detail of a small area, while 広域地図 is a small-scale map covering a broad region with less detail.
Compound of 広域 (こういき, 'wide area') and 地図 (ちず, 'map').