Method render

src/staticmaps.js:109–144

* Render static map with all map features that were added to map before

(center, zoom)

    * Render static map with all map features that were added to map before
    */
  async render(center, zoom) {
    if (!this.lines && !this.markers && !this.multipolygons && !(center && zoom)) {
      throw new Error('Cannot render empty map: Add  center || lines || markers || polygons.');
    }

    this.center = center;
    this.zoom = zoom || this.calculateZoom();

    const maxZoom = this.zoomRange.max;
    if (maxZoom && this.zoom > maxZoom) this.zoom = maxZoom;

    if (center && center.length === 2) {
      this.centerX = geoutils.lonToX(center[0], this.zoom);
      this.centerY = geoutils.latToY(center[1], this.zoom);
    } else {
      // # get extent of all lines
      const extent = this.determineExtent(this.zoom);

      // # calculate center point of map
      const centerLon = (extent[0] + extent[2]) / 2;
      const centerLat = (extent[1] + extent[3]) / 2;

      this.centerX = geoutils.lonToX(centerLon, this.zoom);
      this.centerY = geoutils.latToY(centerLat, this.zoom);
    }

    this.image = new Image(this.options);

    // Await this.drawLayer for each tile layer
    await mapSeries(this.tileLayers, async (layer) => {
      await this.drawLayer(layer);
    });

    await this.loadMarker();
    return this.drawFeatures();
  }

  /**
    * calculate common extent of all current map features