signalk-parquet/dist/utils/angular-paths.d.ts

Vessel data Parquet file archive with automated value and geospatial triggers. History API compliant with cloud backups and queries.

/**
 * Angular Path Detection and Helpers
 *
 * Detects angular paths (heading, COG, wind direction, etc.) via server metadata
 * and provides helpers for vector averaging in DuckDB SQL.
 *
 * Angular data requires vector decomposition for correct averaging:
 * AVG(10°, 350°) should = 0°, not 180°.
 * Solution: ATAN2(AVG(SIN(value)), AVG(COS(value)))
 */
import { ServerAPI } from '@signalk/server-api';
/**
 * Detect if a path contains angular data by checking the SignalK schema.
 * getMetadata() (from @signalk/signalk-schema) matches against schema
 * regexes like /vessels/<context>/<path>. Any valid context prefix works
 * since the schema uses wildcards for the context segment.
 */
export declare function isAngularPath(path: string, app: ServerAPI, context: string): boolean;
/**
 * Paths where angle should be weighted by an associated magnitude.
 * These are well-defined SignalK path pairs and unlikely to change,
 * so a static map is appropriate here.
 */
export declare const WEIGHTED_ANGULAR_PATHS: Map<string, string>;
export declare function getWeightPath(anglePath: string): string | undefined;
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