Updated to marker with 1cm of margin

launch/spawn_localization_sign.launch

@@ -2,7 +2,7 @@
 <launch>
   <arg name="name"  default="loc_sign"/>
   <arg name="model" default="loc_sign"/>
-  <arg name="tag"   default="alvar2_negative"/>
+  <arg name="tag"   default="alvar2_neg_1"/>
   <arg name="x"     default="0.5"/>
   <arg name="y"     default="-0.5"/>
   <arg name="yaw"   default="3.14159"/>