2 files changed, 17 insertions, 0 deletions
diff --git a/src/org/traccar/helper/Parser.java b/src/org/traccar/helper/Parser.java
index 69c80adb2..582b497cf 100644
--- a/src/org/traccar/helper/Parser.java
+++ b/src/org/traccar/helper/Parser.java
@@ -121,6 +121,14 @@ public class Parser {
         }
     }
 
+    public Double nextDouble() {
+        if (hasNext()) {
+            return Double.parseDouble(next());
+        } else {
+            return null;
+        }
+    }
+
     public double nextDouble(double defaultValue) {
         if (hasNext()) {
             return Double.parseDouble(next());
diff --git a/src/org/traccar/helper/UnitsConverter.java b/src/org/traccar/helper/UnitsConverter.java
index e0d94c6dc..56d15e4e7 100644
--- a/src/org/traccar/helper/UnitsConverter.java
+++ b/src/org/traccar/helper/UnitsConverter.java
@@ -22,6 +22,7 @@ public final class UnitsConverter {
     private static final double KNOTS_TO_MPS_RATIO = 1.94384;
     private static final double KNOTS_TO_CPS_RATIO = 0.0194384449;
     private static final double METERS_TO_FEET_RATIO = 0.3048;
+    private static final double METERS_TO_MILE_RATIO = 1609.34;
 
     private UnitsConverter() {
     }
@@ -62,4 +63,12 @@ public final class UnitsConverter {
         return value * METERS_TO_FEET_RATIO;
     }
 
+    public static double milesFromMeters(double value) {
+        return value / METERS_TO_MILE_RATIO;
+    }
+
+    public static double metersFromMiles(double value) {
+        return value * METERS_TO_MILE_RATIO;
+    }
+
 }