Method _getResizedZoom

src/common/mapping/WebMapBase.js:707–719

(bounds, mapContainerStyle, tileSize = 512, worldWidth = WORLD_WIDTH)

    }

    _getResizedZoom(bounds, mapContainerStyle, tileSize = 512, worldWidth = WORLD_WIDTH) {
      const { width, height } = mapContainerStyle;
      const lngArcLength = Math.abs(bounds.getEast() - bounds.getWest());
      const latArcLength = Math.abs(
        this._getBoundsRadian(bounds.getSouth()) - this._getBoundsRadian(bounds.getNorth())
      );
      const lngResizeZoom = +Math.log2(worldWidth / ((lngArcLength / parseInt(width)) * tileSize)).toFixed(2);
      const latResizeZoom = +Math.log2(worldWidth / ((latArcLength / parseInt(height)) * tileSize)).toFixed(2);
      if (lngResizeZoom <= latResizeZoom) {
        return lngResizeZoom;
      }
      return latResizeZoom;
    }

    _getBoundsRadian(point) {
      return (180 / Math.PI) * Math.log(Math.tan(Math.PI / 4 + (point * Math.PI) / 360));