diff --git a/src/iscs_graphic_data.proto b/src/iscs_graphic_data.proto
index dc5e777..6683475 100644
--- a/src/iscs_graphic_data.proto
+++ b/src/iscs_graphic_data.proto
@@ -3,6 +3,7 @@ package iscsGraphicData;
 
 message IscsGraphicStorage {
   Canvas canvas = 1;
+  UniqueIdOfStationLayout UniqueIdPrefix = 2;//地图唯一信息
 }
 
 message Canvas {
@@ -59,3 +60,9 @@ message CommonInfo {
   repeated ChildTransform childTransforms = 4;
   uint32 id = 5;
 }
+
+message UniqueIdOfStationLayout {
+  string city = 1;//城市
+  string lineId = 2;//线路号
+  string mainCoordinateSystem = 3;//地图的公里标主坐标系
+}