import type { ResolvedScale } from './types.js';
/** Smallest positive distance between distinct mapped semantic values. */
export declare function minimumMappedSpacing(scale: ResolvedScale, values: readonly unknown[]): number | undefined;
/** Category step from the complete scale domain, with a bounded singleton fallback. */
export declare function resolvedCategoryStep(scale: ResolvedScale, plotSpan: number, fitUnits?: number): number;
export declare function isResolvedCategoryScale(scale: ResolvedScale | undefined): boolean;