Corrects errors with data using gid in strings

src/app/shared/models/data.model.ts

@@ -21,6 +21,7 @@ export class Data implements IData {
       this.type = data.type;
       this.properties = data.properties;
       this.id = data.properties.gid ? data.properties.gid:data.properties.gid_int;
+      this.id = this.id ? this.id:parseInt(data.properties.gid_str);
     }
   }
 }