gis-tools-ts/dist/geometry/tools/simplify.d.ts

A collection of geospatial tools primarily designed for WGS84, Web Mercator, and S2.

import type { MValue, Properties, VectorGeometry, VectorLineString } from '../../index.js';
/**
 * Builds squared distances for the vector geometry using the Douglas-Peucker algorithm.
 * @param geometry - input vector geometry
 * @param tolerance - simplification tolerance
 * @param maxzoom - max zoom level to simplify
 */
export declare function buildSqDists<M extends MValue = Properties>(geometry: VectorGeometry<M>, tolerance: number, maxzoom?: number): void;
/**
 * calculate simplification of line vector data using
 * optimized Douglas-Peucker algorithm
 * @param coords - input coordinates
 * @param first - first point index
 * @param last - last points index
 * @param sqTolerance - simplification tolerance (higher means simpler)
 */
export declare function buildSqDist<M extends MValue = Properties>(coords: VectorLineString<M>, first: number, last: number, sqTolerance: number): void;
/**
 * Simplifies the vector geometry based on zoom level and tolerance.
 * If the geometry is simplified past it being valid, set the coordinates to an empty array.
 * @param geometry - input vector geometry
 * @param tolerance - simplification tolerance
 * @param zoom - curent zoom
 * @param maxzoom - max zoom level
 */
export declare function simplify<M extends MValue = Properties>(geometry: VectorGeometry<M>, tolerance: number, zoom: number, maxzoom?: number): void;
/**
 * In place adjust the ring if necessary
 * @param ring - the ring to rewind
 * @param clockwise - whether the ring needs to be clockwise
 */
export declare function rewind<M extends MValue = Properties>(ring: VectorLineString<M>, clockwise: boolean): void;
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