GroundImageState

GroundImageState is an ObservableObject used by GroundImage(state:).

Use it when the image, opacity, geographic bounds, or click handler changes at runtime.

Public Properties

id: String
bounds: GeoRectBounds
image: UIImage
opacity: Double
tileSize: Int
extra: Any?
onClick: OnGroundImageEventHandler?

let bounds = GeoRectBounds(
    southWest: GeoPoint(latitude: 35.67, longitude: 139.74),
    northEast: GeoPoint(latitude: 35.69, longitude: 139.76)
)

let groundImageState = GroundImageState(
    bounds: bounds,
    image: UIImage(named: "overlay")!,
    opacity: 0.5
)

GroundImage(state: groundImageState)

groundImageState.opacity = 1.0

Repositioning

Update bounds to move or resize the image:

groundImageState.bounds = GeoRectBounds(
    southWest: GeoPoint(latitude: 35.66, longitude: 139.73),
    northEast: GeoPoint(latitude: 35.70, longitude: 139.77)
)

Update image when the displayed raster changes. Use tileSize to control the tile size used by the overlay renderer.