import type { ElevationConverter, MValue, Properties, TileID, VectorFeatureCollection, VectorMultiPolygonFeature, VectorMultiPolygonGeometry } from '../../index.js';
export interface HillshadeProperties extends Properties {
    hillshade: string;
}
export type HillshadeFeature = VectorMultiPolygonFeature<Record<string, unknown>, MValue, HillshadeProperties>;
export type HillshadeFeatureCollection = VectorFeatureCollection<Record<string, unknown>, MValue, HillshadeProperties, VectorMultiPolygonGeometry>;
export interface HillshadeResult {
    width: number;
    height: number;
    hillshade: number[];
}
/**
 * # Vectorize hillshade data
 *
 * ## Description
 * Generate vectorized hillshade data with lights and darks
 *
 * ## Example
 * ```ts
 * import { generateHillshade } from 'gis-tools-ts';
 * import sharp from 'sharp';
 *
 * const elevationImage = await Bun.file(`${__dirname}/fixtures/13_1544_3085.webp`).arrayBuffer();
 * const vectorHillshade = await vectorizeHillshade(elevationImage, [13, 1544, 3085]);
 * ```
 *
 * ## Links
 * - <https://pro.arcgis.com/en/pro-app/latest/tool-reference/3d-analyst/how-hillshade-works.htm>
 *
 * @param imageData - the raw RGB(A) image data
 * @param tile - The zoom, x, and y of the tile
 * @param elevationConverter - the conversion function to convert the pixels to elevation
 * @param tmsStyle - if true, the y position will be inverted
 * @param azimuth - The azimuth of the sun
 * @param altitude - The altitude of the sun
 * @param zFactor - The zFactor effects the weight of the sun's light ouput
 * @param thresholds - The thresholds for the lights and darks to generate
 * @param weights - The weights of the azimuths. The first azimuth is the sun's azimuth value parameter. Each subsequent azimuth is the angle away from the sun.
 * @param padding - The padding to add to the image. This is needed to account for the edge of the tile.
 * @param tolerance - The tolerance of the simplification of the lines using the Ramer-Douglas-Peucker algorithm
 * @returns An image/array of grayscale values
 */
export declare function vectorizeHillshade(imageData: ArrayBufferLike | Uint8Array<ArrayBufferLike> | Uint8ClampedArray<ArrayBufferLike> | Buffer<ArrayBufferLike>, tile: TileID, elevationConverter?: ElevationConverter, tmsStyle?: boolean, azimuth?: number, altitude?: number, zFactor?: number, thresholds?: Map<number, string>, weights?: [primary: number, neg45: number, pos45: number, pos90: number], padding?: number, tolerance?: number): Promise<HillshadeFeatureCollection>;
/**
 * # Build greyscale hillshade data
 *
 * ## Description
 * Builds an array of grayscale values for a given tile.
 *
 * ## Example
 * ```ts
 * import { generateHillshade } from 'gis-tools-ts';
 * import sharp from 'sharp';
 *
 * import type { SharpOptions } from 'sharp';
 *
 * const elevationImage = await Bun.file(`${__dirname}/fixtures/13_1544_3085.webp`).arrayBuffer();
 * const { width, height, hillshade } = await generateHillshade(elevationImage, [13, 1544, 3085]);
 *
 * const sharpOptions: SharpOptions = { raw: { width, height, channels: 1 } };
 * const pngData = await sharp(new Uint8ClampedArray(hillshade), sharpOptions).png().toBuffer();
 * ```
 *
 * ## Links
 * - <https://pro.arcgis.com/en/pro-app/latest/tool-reference/3d-analyst/how-hillshade-works.htm>
 *
 * @param imageData - the raw RGB(A) image data
 * @param tile - The zoom, x, and y of the tile
 * @param elevationConverter - the conversion function to convert the pixels to elevation
 * @param tmsStyle - if true, the y position will be inverted
 * @param azimuth - The azimuth of the sun
 * @param altitude - The altitude of the sun
 * @param zFactor - The zFactor effects the weight of the sun's light ouput
 * @param weights - The weights of the azimuths. The first azimuth is the sun's azimuth value parameter. Each subsequent azimuth is the angle away from the sun.
 * @param smooth - if true, the hillshade will be smoothed
 * @returns An image/array of grayscale values
 */
export declare function generateHillshade(imageData: ArrayBufferLike | Uint8Array<ArrayBufferLike> | Uint8ClampedArray<ArrayBufferLike> | Buffer<ArrayBufferLike>, tile: TileID, elevationConverter?: ElevationConverter, tmsStyle?: boolean, azimuth?: number, altitude?: number, zFactor?: number, weights?: [primary: number, neg45: number, pos45: number, pos90: number], smooth?: boolean): Promise<HillshadeResult>;
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