@sailboat-computer/data-storage/dist/downsampling/strategies/geospatial.d.ts

Shared data storage library for sailboat computer v3

/**
 * Geospatial downsampling strategy implementation
 */
import { Downsampler, StoredData, GeospatialStrategy } from '../../types';
/**
 * Geospatial downsampler implementation
 */
export declare class GeospatialDownsampler implements Downsampler {
    readonly type = "geospatial";
    /**
     * Downsample data using geospatial strategy
     *
     * @param data - Data to downsample
     * @param strategy - Geospatial strategy
     * @returns Downsampled data
     */
    downsample(data: StoredData[], strategy: GeospatialStrategy): Promise<StoredData[]>;
    /**
     * Extract points from data
     *
     * @param data - Data to extract points from
     * @returns Extracted points
     */
    private extractPoints;
    /**
     * Extract coordinate from data
     *
     * @param item - Data item
     * @param primaryKey - Primary key to look for
     * @param alternateKeys - Alternate keys to look for
     * @returns Coordinate value or null if not found
     */
    private extractCoordinate;
    /**
     * Calculate perpendicular distance from point to line
     *
     * @param point - Point
     * @param lineStart - Line start point
     * @param lineEnd - Line end point
     * @returns Perpendicular distance
     */
    private perpendicularDistance;
    /**
     * Douglas-Peucker algorithm for path simplification
     *
     * @param points - Points to simplify
     * @param epsilon - Simplification tolerance
     * @returns Simplified points
     */
    private douglasPeucker;
    /**
     * Preserve direction changes
     *
     * @param originalPoints - Original points
     * @param simplifiedPoints - Simplified points
     * @param minAngleChange - Minimum angle change to preserve
     */
    private preserveDirectionChanges;
    /**
     * Calculate bearing between two points
     *
     * @param point1 - First point
     * @param point2 - Second point
     * @returns Bearing in degrees
     */
    private calculateBearing;
    /**
     * Preserve key points
     *
     * @param originalPoints - Original points
     * @param simplifiedPoints - Simplified points
     */
    private preserveKeyPoints;
    /**
     * Check if data is a key point
     *
     * @param data - Data to check
     * @returns Whether data is a key point
     */
    private isKeyPoint;
}
/**
 * Create a new geospatial downsampler
 *
 * @returns Geospatial downsampler
 */
export declare function createGeospatialDownsampler(): Downsampler;