Recommend Offline Regions

This guide covers how to find regions near the user or along a route so the iOS app can suggest the right offline data before travel begins.

Query by current location or complete route

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let nearby = try await NBNavigation.getCountiesInRadius(
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    latitude: coordinate.latitude,
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    longitude: coordinate.longitude,
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    radiusMeters: 50_000
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)
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let alongRoute = try await NBNavigation.getCountiesAlongRoute(route: route)

The result uses the same OfflineRegionCatalog model as listOfflineRegions, so the region-list UI can be reused. Coordinates must use WGS84 standard. An along-route query requires at least two valid, distinct coordinates. The query may retrieve missing region details, so provide a loading state and cancellation handling.