diff --git a/.gitignore b/.gitignore
index 0938d090..189652e6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,4 +35,3 @@ windows/**/AvChartConvert.v12.suo
 windows/installer/Output
 windows/installer/library
 android/assets/sounds/**
-/.pydevproject
diff --git a/.pydevproject b/.pydevproject
new file mode 100644
index 00000000..af296c54
--- /dev/null
+++ b/.pydevproject
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<?eclipse-pydev version="1.0"?><pydev_project>
+        
+    <pydev_property name="org.python.pydev.PYTHON_PROJECT_INTERPRETER">Default</pydev_property>
+        
+    <pydev_property name="org.python.pydev.PYTHON_PROJECT_VERSION">python interpreter</pydev_property>
+    
+</pydev_project>
diff --git a/viewer/util/formatter.js b/viewer/util/formatter.js
index af4793bf..17ed38be 100644
--- a/viewer/util/formatter.js
+++ b/viewer/util/formatter.js
@@ -175,7 +175,7 @@ const formatDirection=function(dir,opt_rad,opt_180){
     return formatDecimal(dir,3,0);
 };
 formatDirection.parameters=[    {name:'inputRadian',type:'BOOLEAN',default:false},
-    {name:'range180',type:'BOOLEAN',default:false}
+    {name:'±180°',type:'BOOLEAN',default:false}
 ];
 
 /**
diff --git a/viewer/util/helper.js b/viewer/util/helper.js
index 46de4c05..c667ac21 100644
--- a/viewer/util/helper.js
+++ b/viewer/util/helper.js
@@ -135,7 +135,7 @@ Helper.to360=(a)=>{
 };
 
 Helper.to180=(a)=>{
-    return to360(a+180)-180;
+    return Helper.to360(a+180)-180;
 };
 
 Helper.radians=(a)=>{