diff --git a/data/presets.yaml b/data/presets.yaml
index fd2f14706..8273dfada 100644
--- a/data/presets.yaml
+++ b/data/presets.yaml
@@ -506,8 +506,6 @@ en:
           deciduous: Deciduous
           # leaf_cycle=evergreen
           evergreen: Evergreen
-          # leaf_cycle=mixed
-          mixed: Mixed
           # leaf_cycle=semi_deciduous
           semi_deciduous: Semi-Deciduous
           # leaf_cycle=semi_evergreen
@@ -532,8 +530,6 @@ en:
           broadleaved: Broadleaved
           # leaf_type=leafless
           leafless: Leafless
-          # leaf_type=mixed
-          mixed: Mixed
           # leaf_type=needleleaved
           needleleaved: Needleleaved
       leisure:
diff --git a/data/presets/fields.json b/data/presets/fields.json
index 05765d089..386280ff1 100644
--- a/data/presets/fields.json
+++ b/data/presets/fields.json
@@ -682,8 +682,7 @@
                 "evergreen": "Evergreen",
                 "deciduous": "Deciduous",
                 "semi_evergreen": "Semi-Evergreen",
-                "semi_deciduous": "Semi-Deciduous",
-                "mixed": "Mixed"
+                "semi_deciduous": "Semi-Deciduous"
             }
         }
     },
@@ -708,7 +707,6 @@
             "options": {
                 "broadleaved": "Broadleaved",
                 "needleleaved": "Needleleaved",
-                "mixed": "Mixed",
                 "leafless": "Leafless"
             }
         }
diff --git a/dist/locales/en.json b/dist/locales/en.json
index f7e06a297..4bcd52986 100644
--- a/dist/locales/en.json
+++ b/dist/locales/en.json
@@ -1019,8 +1019,7 @@
                     "evergreen": "Evergreen",
                     "deciduous": "Deciduous",
                     "semi_evergreen": "Semi-Evergreen",
-                    "semi_deciduous": "Semi-Deciduous",
-                    "mixed": "Mixed"
+                    "semi_deciduous": "Semi-Deciduous"
                 }
             },
             "leaf_type": {
@@ -1037,7 +1036,6 @@
                 "options": {
                     "broadleaved": "Broadleaved",
                     "needleleaved": "Needleleaved",
-                    "mixed": "Mixed",
                     "leafless": "Leafless"
                 }
             },
diff --git a/js/id/geo.js b/js/id/geo.js
index 7e1dfc527..826da1090 100644
--- a/js/id/geo.js
+++ b/js/id/geo.js
@@ -192,7 +192,7 @@ iD.geo.polygonContainsPolygon = function(outer, inner) {
     });
 };
 
-iD.geo.polygonIntersectsPolygon = function(outer, inner) {
+iD.geo.polygonIntersectsPolygon = function(outer, inner, checkSegments) {
     function testSegments(outer, inner) {
         for (var i = 0; i < outer.length - 1; i++) {
             for (var j = 0; j < inner.length - 1; j++) {
@@ -204,9 +204,13 @@ iD.geo.polygonIntersectsPolygon = function(outer, inner) {
         return false;
     }
 
-    return _.some(inner, function(point) {
-        return iD.geo.pointInPolygon(point, outer);
-    }) || testSegments(outer, inner);
+    function testPoints(outer, inner) {
+        return _.some(inner, function(point) {
+            return iD.geo.pointInPolygon(point, outer);
+        });
+    }
+
+   return testPoints(outer, inner) || (!!checkSegments && testSegments(outer, inner));
 };
 
 iD.geo.pathLength = function(path) {
diff --git a/js/id/renderer/background.js b/js/id/renderer/background.js
index 1cf3c29bb..f1db6f9e0 100644
--- a/js/id/renderer/background.js
+++ b/js/id/renderer/background.js
@@ -159,7 +159,7 @@ iD.Background = function(context) {
                     return _.union(coords, feature.geometry.type === 'Point' ? [c] : c);
                 }, []);
 
-            if (!iD.geo.polygonIntersectsPolygon(viewport, coords)) {
+            if (!iD.geo.polygonIntersectsPolygon(viewport, coords, true)) {
                 var extent = iD.geo.Extent(d3.geo.bounds(gpxLayer.geojson()));
                 map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
             }
diff --git a/js/id/renderer/background_source.js b/js/id/renderer/background_source.js
index 653a723a2..3cf96da2c 100644
--- a/js/id/renderer/background_source.js
+++ b/js/id/renderer/background_source.js
@@ -53,7 +53,7 @@ iD.BackgroundSource = function(data) {
     source.intersects = function(extent) {
         extent = extent.polygon();
         return !data.polygon || data.polygon.some(function(polygon) {
-            return iD.geo.polygonIntersectsPolygon(polygon, extent);
+            return iD.geo.polygonIntersectsPolygon(polygon, extent, true);
         });
     };
 
diff --git a/test/spec/geo.js b/test/spec/geo.js
index e3f5b22e7..04c9dccfc 100644
--- a/test/spec/geo.js
+++ b/test/spec/geo.js
@@ -288,25 +288,31 @@ describe('iD.geo', function() {
     });
 
     describe('.polygonIntersectsPolygon', function() {
-        it('says a polygon in a polygon intersects it', function() {
+        it('returns true when outer polygon fully contains inner', function() {
             var outer = [[0, 0], [0, 3], [3, 3], [3, 0], [0, 0]];
             var inner = [[1, 1], [1, 2], [2, 2], [2, 1], [1, 1]];
             expect(iD.geo.polygonIntersectsPolygon(outer, inner)).to.be.true;
         });
 
-        it('says a polygon that partially intersects does when some points are contained', function() {
+        it('returns true when outer polygon partially contains inner (some vertices contained)', function() {
             var outer = [[0, 0], [0, 3], [3, 3], [3, 0], [0, 0]];
             var inner = [[-1, -1], [1, 2], [2, 2], [2, 1], [1, 1]];
             expect(iD.geo.polygonIntersectsPolygon(outer, inner)).to.be.true;
         });
 
-        it('says a polygon that partially intersects does when no points are contained', function() {
+        it('returns false when outer polygon partially contains inner (no vertices contained - lax test)', function() {
             var outer = [[0, 0], [0, 3], [3, 3], [3, 0], [0, 0]];
             var inner = [[1, -1], [1, 4], [2, 4], [2, -1], [1, -1]];
-            expect(iD.geo.polygonIntersectsPolygon(outer, inner)).to.be.true;
+            expect(iD.geo.polygonIntersectsPolygon(outer, inner)).to.be.false;
         });
 
-        it('says totally disjoint polygons do not intersect', function() {
+        it('returns true when outer polygon partially contains inner (no vertices contained - strict test)', function() {
+            var outer = [[0, 0], [0, 3], [3, 3], [3, 0], [0, 0]];
+            var inner = [[1, -1], [1, 4], [2, 4], [2, -1], [1, -1]];
+            expect(iD.geo.polygonIntersectsPolygon(outer, inner, true)).to.be.true;
+        });
+
+        it('returns false when outer and inner are fully disjoint', function() {
             var outer = [[0, 0], [0, 3], [3, 3], [3, 0], [0, 0]];
             var inner = [[-1, -1], [-1, -2], [-2, -2], [-2, -1], [-1, -1]];
             expect(iD.geo.polygonIntersectsPolygon(outer, inner)).to.be.false;