12-4

src/Global/Contour/index.js

@@ -76,6 +76,15 @@ function accordingToCameraHeight() {
 }
 
 function startDraw(sdk, showData) {
+  if(!sdk || !sdk.viewer) {
+    return
+  }
+  if (showData) {
+    let terrainAvailability = sdk.viewer.terrainProvider.availability;
+    if (!terrainAvailability) {
+      return '未加载地形数据！'
+    }
+  }
   show = showData
 
   Object.keys(paramData).forEach(item => {