import 'graphile-build';
import 'graphile-build-pg';
import type { GraphileConfig } from 'graphile-config';
import '../types';
/**
 * PostgisMeasurementFieldsPlugin
 *
 * Adds measurement fields to PostGIS geometry/geography object types:
 *
 * - LineString / MultiLineString: `length` (meters, Haversine)
 * - Polygon / MultiPolygon: `area` (sq meters, spherical excess), `perimeter` (meters)
 *
 * All measurements are approximate geodesic calculations from GeoJSON
 * coordinates assuming WGS84. For exact PostGIS server-side values, use
 * SQL computed columns (ST_Area, ST_Length, ST_Perimeter).
 */
export declare const PostgisMeasurementFieldsPlugin: GraphileConfig.Plugin;