import { type GeoJsonBbox, type GeoJsonFeatureCollection } from "@trackunit/geo-json-utils";
/**
 * Count features in `collection` whose geometry overlaps (or touches) `bounds`.
 *
 * Returns the total feature count when `bounds` is null (e.g. before the map
 * has reported its first viewport). For Point features this is equivalent to
 * the previous marker-only point-in-bounds check; for non-Point features it is
 * a cheap bbox-vs-bbox intersection — full geometry clipping is intentionally
 * avoided since this runs every adaptive resolution pass.
 *
 * Shared by both the marker adaptive resolution system and the shape label
 * resolution system so the two never disagree on what "in viewport" means.
 */
export declare const countFeaturesInViewport: (collection: GeoJsonFeatureCollection, bounds: Readonly<GeoJsonBbox> | null) => number;