1 files changed, 18 insertions, 5 deletions
diff --git a/src/contains.js b/src/contains.js
index 952a62d..3b8e0c8 100644
--- a/src/contains.js
+++ b/src/contains.js
@@ -1,6 +1,6 @@
 import {default as polygonContains} from "./polygonContains";
 import {default as distance} from "./distance";
-import {epsilon, radians} from "./math";
+import {epsilon2, radians} from "./math";
 
 var containsObjectType = {
   Feature: function(object, point) {
@@ -59,10 +59,23 @@ function containsPoint(coordinates, point) {
 }
 
 function containsLine(coordinates, point) {
-  var ab = distance(coordinates[0], coordinates[1]),
-      ao = distance(coordinates[0], point),
-      ob = distance(point, coordinates[1]);
-  return ao + ob <= ab + epsilon;
+  var ao, bo, ab;
+  for (var i = 0, n = coordinates.length; i < n; i++) {
+    bo = distance(coordinates[i], point);
+    if (bo === 0) return true;
+    if (i > 0) {
+      ab = distance(coordinates[i], coordinates[i - 1]);
+      if (
+        ab > 0 &&
+        ao <= ab &&
+        bo <= ab &&
+        (ao + bo - ab) * (1 - Math.pow((ao - bo) / ab, 2)) < epsilon2 * ab
+      )
+        return true;
+    }
+    ao = bo;
+  }
+  return false;
 }
 
 function containsPolygon(coordinates, point) {