fix(scale): fix

components/label/utils/scale.ts

@@ -0,0 +1,23 @@
+export const normalizeScale = (value: number | null | undefined) => {
+  return Number.isFinite(value) && Number(value) > 0 ? Number(value) : 1
+}
+
+export const getDisplayedImageScale = ({
+  rasterScale,
+  viewScale,
+}: {
+  rasterScale?: number | null
+  viewScale?: number | null
+}) => {
+  return normalizeScale(rasterScale) * normalizeScale(viewScale)
+}
+
+export const getViewScaleFromDisplayedScale = ({
+  displayedScale,
+  rasterScale,
+}: {
+  displayedScale?: number | null
+  rasterScale?: number | null
+}) => {
+  return normalizeScale(displayedScale) / normalizeScale(rasterScale)
+}