diff --git a/src/components/pages/selectArea.vue b/src/components/pages/selectArea.vue
index 2a34ab4..04b3690 100644
--- a/src/components/pages/selectArea.vue
+++ b/src/components/pages/selectArea.vue
@@ -197,9 +197,12 @@ export default {
   },
   onLoad(params) {
     Object.keys(params).map(k => {
-      this.$set(this.urlParams, k, params[k] == "false" ? false : params[k])
+      this.$set(this.urlParams, k,
+          params[k] == "false" ? false :
+              params[k] == "undefined" ? null : params[k]
+      )
     })
-    this.handleInit()
+    this.$nextTick(() => this.handleInit())
   }
 }
 </script>