--- a/client/src/components/identify/Identify.vue	Thu Feb 28 14:51:03 2019 +0100
+++ b/client/src/components/identify/Identify.vue	Thu Feb 28 15:34:07 2019 +0100
@@ -138,20 +138,20 @@
       // create array with {key, val} objects
       let propsArray = [];
       Object.keys(feature.getProperties()).forEach(key => {
-        let val = feature.getProperties()[key];
+        // skip geometry (would lead to cyclic object error)
+        if (key !== feature.getGeometryName()) {
+          let val = feature.getProperties()[key];
 
-        // if val is a valid json string, parse it and spread its values into
-        // the array
-        try {
-          let json = JSON.parse(val);
-          Object.keys(json).forEach(key => {
-            propsArray.push({ key, val: json[key] });
-          });
-        } catch (e) {
-          // if val is not json then just put the key value pair into the array
-          // avoid cyclic object value (I didn't further investigate what's the
-          // problem here but feature.getGeometryName() needs to be skipped)
-          if (key !== feature.getGeometryName()) propsArray.push({ key, val });
+          // if val is a valid json object string, spread its values into the array
+          let jsonObj = this.getObjectFromString(val);
+          if (jsonObj) {
+            Object.keys(jsonObj).forEach(key => {
+              propsArray.push({ key, val: jsonObj[key] });
+            });
+          } else {
+            // otherwise just put the key value pair into the array
+            propsArray.push({ key, val });
+          }
         }
       });
 
@@ -168,6 +168,20 @@
       });
 
       return propsArray;
+    },
+    getObjectFromString(val) {
+      // JSON.parse() accepts integers and null as valid json. So to be sure to
+      // get an object, we cannot just try JSON.parse() but we need to check if
+      // the given value is a string and starts with a {.
+      if (
+        Object.prototype.toString.call(val) === "[object String]" &&
+        val[0] === "{"
+      ) {
+        try {
+          return JSON.parse(val);
+        } catch (e) {}
+      }
+      return null;
     }
   }
 };