diff --git a/mosstool/map/builder/builder.py b/mosstool/map/builder/builder.py
index 82e3a87..a18da8c 100644
--- a/mosstool/map/builder/builder.py
+++ b/mosstool/map/builder/builder.py
@@ -4308,7 +4308,7 @@ def get_output_map(self, name: str):
                 _line = self.map_lanes[nearest_lane_pos["lane_id"]]
                 _line_z = (_line.coords[-1][2] - _line.coords[0][2]) * (
                     nearest_lane_pos["s"] / _line.length
-                )
+                ) + _line.coords[0][2]
             else:
                 _line_z = 0
             # posistion
diff --git a/pyproject.toml b/pyproject.toml
index 51dd18c..c6e4b56 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "mosstool"
-version = "1.2.4"
+version = "1.2.5"
 description = "MObility Simulation System toolbox "
 authors = ["Jun Zhang <zhangjun990222@qq.com>","Junbo Yan <yanjb20thu@gmali.com>"]
 license = "MIT"