diff --git a/Algorithms/DouglasPeucker.cpp b/Algorithms/DouglasPeucker.cpp
index 3f1a9e547..2773d11dc 100644
--- a/Algorithms/DouglasPeucker.cpp
+++ b/Algorithms/DouglasPeucker.cpp
@@ -104,17 +104,17 @@ void DouglasPeucker::Run(std::vector<SegmentInformation> &input_geometry, const
         BOOST_ASSERT_MSG(input_geometry[pair.second].necessary, "right border must be necessary");
         BOOST_ASSERT_MSG(pair.second < input_geometry.size(), "right border outside of geometry");
         BOOST_ASSERT_MSG(pair.first < pair.second, "left border on the wrong side");
-        double max_distance = std::numeric_limits<double>::min();
+        float max_distance = std::numeric_limits<float>::min();
 
         unsigned farthest_element_index = pair.second;
         // find index idx of element with max_distance
         for (unsigned i = pair.first + 1; i < pair.second; ++i)
         {
-            const double temp_dist = FixedPointCoordinate::ComputePerpendicularDistance(
+            const float temp_dist = FixedPointCoordinate::ComputePerpendicularDistance(
                 input_geometry[i].location,
                 input_geometry[pair.first].location,
                 input_geometry[pair.second].location);
-            const double distance = std::abs(temp_dist);
+            const float distance = std::abs(temp_dist);
             if (distance > douglas_peucker_thresholds[zoom_level] && distance > max_distance)
             {
                 farthest_element_index = i;
diff --git a/Algorithms/DouglasPeucker.h b/Algorithms/DouglasPeucker.h
index c7527b02b..c3d942458 100644
--- a/Algorithms/DouglasPeucker.h
+++ b/Algorithms/DouglasPeucker.h
@@ -44,16 +44,12 @@ struct SegmentInformation;
 class DouglasPeucker
 {
   private:
-    std::vector<double> douglas_peucker_thresholds;
+    std::vector<float> douglas_peucker_thresholds;
 
     typedef std::pair<unsigned, unsigned> GeometryRange;
     // Stack to simulate the recursion
     std::stack<GeometryRange> recursion_stack;
 
-    double ComputeDistance(const FixedPointCoordinate &point,
-                           const FixedPointCoordinate &segA,
-                           const FixedPointCoordinate &segB) const;
-
   public:
     DouglasPeucker();
     void Run(std::vector<SegmentInformation> &input_geometry, const unsigned zoom_level);