OptionalfallbackOptionalfallbackinstead of using a fallback map, this map will fail to activate if another map is active and the current viewpoint cannot be shown
OptionallayerlayerCollection to use, if not provided an empty Collection will be created.
Optionaltarget?: string | HTMLElementthe HTMLElement to render the map into
the name of the fallback map to use, e.g. in case there is no oblique image at the activation viewpoint