@open-formulieren/leaflet-tools/lib/tiles.js

Shared utilities for Leaflet maps and Dutch (NL) geo standards

import { TILE_BASE_URL, TILES_ATTRIBUTION } from './constants';
export const buildTileLayerEndpoint = (variant = 'standaard', projection = 'EPSG:28992') => {
    const base = `${TILE_BASE_URL}${variant}/${projection}`;
    return `${base}/{z}/{x}/{y}.png`;
};
/**
 * A pre-configured tile layer for the Rijksdriehoek (RD) projection (EPSG:28992).
 *
 * This used the standard tile layer with attribution enabled, while limiting the zoom
 * level between 1 and 13.
 *
 * @note
 *
 * Increasing the zoom level is *possible*, but the inaccuracies of the proj4
 * transformation start to show beyond zoom level 13.
 */
export const TILE_LAYER_RD = {
    url: buildTileLayerEndpoint('standaard', 'EPSG:28992'),
    minZoom: 1,
    maxZoom: 13,
    attribution: TILES_ATTRIBUTION,
};