export type DegreesPerPixel = Readonly<{
    lng: number;
    lat: number;
}>;
/**
 * Degrees of longitude/latitude spanned by a single screen pixel at `zoom`,
 * near `latitudeDeg`, under Web Mercator.
 *
 * Longitude degrees-per-pixel is constant everywhere; latitude degrees-per-pixel
 * scales by `cos(latitude)` because Mercator stretches higher latitudes. Used to
 * convert a pixel label footprint into a geo bounding box so collision runs in
 * the same lng/lat space the marker positions already live in.
 */
export declare const degreesPerPixel: (zoom: number, latitudeDeg: number) => DegreesPerPixel;
export type LabelFootprintDeg = Readonly<{
    widthDeg: number;
    heightDeg: number;
}>;
export type LabelFootprintParams = Readonly<{
    /** Current camera zoom. */
    zoom: number;
    /** Reference latitude (typically the viewport centre) for the lat-per-pixel scale. */
    latitudeDeg: number;
    /** Extra spacing added around every label — the density dial. */
    paddingPx: number;
}>;
/**
 * Upper-bound label footprint as a geo-space width/height, for collision testing.
 *
 * A rendered pill's size does NOT follow the zoom circle-size tier: `MapMarker`
 * lays every pill out at the fixed {@link MARKER_PILL_CONTENT_LAYOUT_SIZE}, and the
 * label text is capped at `maxLabelWidthPx` (ellipsis beyond). We size the collision
 * box to that upper bound — widest pill that can render — so the box is never smaller
 * than what paints, which is what keeps the "no two labels overlap" guarantee honest.
 * Density is tuned via `paddingPx`, not by shrinking the box.
 */
export declare const labelFootprintDeg: ({ zoom, latitudeDeg, paddingPx }: LabelFootprintParams) => LabelFootprintDeg;