import type { AltitudeBound } from '@squawk/types';
/**
 * Tests whether an altitude in feet MSL falls within the vertical bounds
 * defined by a floor and ceiling AltitudeBound pair.
 *
 * Altitude reference handling:
 * - `SFC` - treated as 0 ft MSL (surface level)
 * - `MSL` - compared directly against the queried altitude
 * - `AGL` - the vertical check is skipped for that bound (returns true),
 *   because converting AGL to MSL requires terrain elevation data that this
 *   library does not have. This is a conservative approach: the feature is
 *   included rather than silently excluded when the bound cannot be resolved.
 *   Consumers can inspect the returned AltitudeBound references and apply
 *   their own terrain lookup if needed.
 */
export declare function altitudeMatches(
/** Queried altitude in feet MSL. */
altitudeFt: number, 
/** Lower vertical bound of the airspace feature. */
floor: AltitudeBound, 
/** Upper vertical bound of the airspace feature. */
ceiling: AltitudeBound): boolean;
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