diff --git a/sample_sensor_kit_launch/launch/gnss.launch.xml b/sample_sensor_kit_launch/launch/gnss.launch.xml
index 7ba7291b..003861c4 100644
--- a/sample_sensor_kit_launch/launch/gnss.launch.xml
+++ b/sample_sensor_kit_launch/launch/gnss.launch.xml
@@ -1,7 +1,7 @@
 <launch>
   <arg name="launch_driver" default="true"/>
   <arg name="gnss_receiver" default="ublox" description="ublox(default) or septentrio"/>
-  <arg name="coordinate_system" default="1" description="1:MGRS, 2:PLANE"/>
+  <arg name="coordinate_system" default="1" description="1:MGRS, 3:LocalCartesianWGS84, 4:LocalCartesianUTM"/>
 
   <group>
     <push-ros-namespace namespace="gnss"/>