import { Feature } from '@kepler.gl/types';
export declare function isReservedEditorProperty(key: string): boolean;
/**
 * GeoJSON properties that should survive copy / convert, excluding editor internals.
 */
export declare function getUserFeatureProperties(feature?: Feature | null): Record<string, unknown>;
/**
 * Replace user-facing properties while preserving editor-only keys.
 */
export declare function mergeUserFeatureProperties(feature: Feature, userProperties?: Record<string, unknown>): Feature;
export type EditorFeatureCollection = {
    type: 'FeatureCollection';
    features: Feature[];
};
/**
 * Strip editor-only properties so copied / converted GeoJSON is usable as data.
 */
export declare function sanitizeEditorFeature(feature: Feature): Feature;
/**
 * Convert editor sketch features into a GeoJSON FeatureCollection.
 */
export declare function editorFeaturesToFeatureCollection(features?: Feature[]): EditorFeatureCollection;
/**
 * Convert a polygon-filter feature back into an editor sketch.
 */
export declare function toSketchFeature(feature: Feature): Feature;
/**
 * Map position for a filter badge: the vertex nearest the north-east bbox corner.
 */
export declare function getFilterFeatureAnchor(feature: Feature): [number, number] | null;