Method validScale

src/openlayers/mapping/WebMap.js:761–774

(scale)

  }

  validScale(scale) {
    if (!scale) {
      return false;
    }
    const scaleNum = scale.split(':')[1];
    if (!scaleNum) {
      return false;
    }
    const res = 1 / +scaleNum;
    if (res === Infinity || res >= 1) {
      return false;
    }
    return true;
  }

  limitScale(mapInfo, baseLayer) {
    if (this.validScale(mapInfo.minScale) && this.validScale(mapInfo.maxScale)) {