Function extentToResolutions

src/common/iServer/InitMapServiceBase.js:156–171

(bounds, maxZoom = 22, tileSize = 512)

 * @returns {Array} resolutions
 */
export function extentToResolutions(bounds, maxZoom = 22, tileSize = 512) {
  var resolutions = [];
  var left = bounds.left;
  var right = bounds.right;
  if (Array.isArray(bounds)) {
    left = bounds[0];
    right = bounds[2];
  }
  const maxReolution = Math.abs(left - right) / tileSize;
  for (let i = 0; i < maxZoom; i++) {
    resolutions.push(maxReolution / Math.pow(2, i));
  }
  return resolutions.sort(function (a, b) {
    return b - a;
  });
}

/**
 * @private