diff --git a/lib/src/booleans/boolean_crosses.dart b/lib/src/booleans/boolean_crosses.dart
index e51e421..c7dc406 100644
--- a/lib/src/booleans/boolean_crosses.dart
+++ b/lib/src/booleans/boolean_crosses.dart
@@ -1,5 +1,4 @@
 import '../../helpers.dart';
-import '../invariant.dart';
 import '../line_intersect.dart';
 import '../polygon_to_line.dart';
 import 'boolean_point_in_polygon.dart';
@@ -115,7 +114,7 @@ bool doLineStringsCross(LineString lineString1, LineString lineString2) {
 }
 
 bool doLineStringAndPolygonCross(LineString lineString, Polygon polygon) {
-  LineString line = polygonToLine(polygon);
+  Feature line = polygonToLine(polygon) as Feature;
   var doLinesIntersect = lineIntersect(lineString, line);
   if (doLinesIntersect.features.isNotEmpty) {
     return true;
diff --git a/lib/src/booleans/boolean_disjoint.dart b/lib/src/booleans/boolean_disjoint.dart
index 80342b3..f754618 100644
--- a/lib/src/booleans/boolean_disjoint.dart
+++ b/lib/src/booleans/boolean_disjoint.dart
@@ -27,8 +27,8 @@ bool booleanDisjoint(GeoJSONObject feature1, GeoJSONObject feature2) {
       flattenEach(
         feature2,
         (flatten2, featureIndex, multiFeatureIndex) {
-          if (bool == false) {
-            return false;
+          if (!bool) {
+            return bool;
           }
           bool = _disjoint(flatten1.geometry!, flatten2.geometry!);
         },
@@ -39,7 +39,7 @@ bool booleanDisjoint(GeoJSONObject feature1, GeoJSONObject feature2) {
 }
 
 /// Disjoint operation for simple Geometries (Point/LineString/Polygon)
-_disjoint(GeometryType geom1, GeometryType geom2) {
+bool _disjoint(GeometryType geom1, GeometryType geom2) {
   if (geom1 is Point) {
     if (geom2 is Point) {
       return !_compareCoords(geom1.coordinates, geom2.coordinates);
@@ -64,9 +64,8 @@ _disjoint(GeometryType geom1, GeometryType geom2) {
     } else if (geom2 is Polygon) {
       return !_isPolyInPoly(geom2, geom1);
     }
-  } else {
-    return false;
   }
+  return false;
 }
 
 // http://stackoverflow.com/a/11908158/1979085
diff --git a/lib/src/booleans/boolean_equal.dart b/lib/src/booleans/boolean_equal.dart
index 4f26bc7..283602e 100644
--- a/lib/src/booleans/boolean_equal.dart
+++ b/lib/src/booleans/boolean_equal.dart
@@ -32,7 +32,7 @@ bool booleanEqual(
 
   var equality = Equality(
       precision: precision,
-      shiftedPolygon: shiftedPolygon,
-      direction: direction);
+      shiftedPolygons: shiftedPolygon,
+      reversedGeometries: direction);
   return equality.compare(cleanCoords(feature1), cleanCoords(feature2));
 }
diff --git a/lib/src/booleans/boolean_intersect.dart b/lib/src/booleans/boolean_intersect.dart
index 9e230d6..7a31cca 100644
--- a/lib/src/booleans/boolean_intersect.dart
+++ b/lib/src/booleans/boolean_intersect.dart
@@ -2,8 +2,7 @@ import '../../helpers.dart';
 import '../../meta.dart';
 import 'boolean_disjoint.dart';
 
-
-Boolean-intersects returns (TRUE) two geometries intersect.
+/// returns (TRUE) when two geometries intersect.
 /// @name booleanIntersects
 /// @param {Geometry|Feature<any>} feature1 GeoJSON Feature or Geometry
 /// @param {Geometry|Feature<any>} feature2 GeoJSON Feature or Geometry
diff --git a/lib/src/booleans/boolean_point_in_polygon.dart b/lib/src/booleans/boolean_point_in_polygon.dart
index cb0da21..d97576c 100644
--- a/lib/src/booleans/boolean_point_in_polygon.dart
+++ b/lib/src/booleans/boolean_point_in_polygon.dart
@@ -1,10 +1,10 @@
 // http://en.wikipedia.org/wiki/Even%E2%80%93odd_rule
 // modified from: https://github.com/substack/point-in-polygon/blob/master/index.js
 // which was modified from http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html
-import 'package:pip/pip.dart';
+
+import 'package:turf_pip/turf_pip.dart';
 
 import '../../helpers.dart';
-import '../invariant.dart';
 
 /// Takes a [Point], and a [Polygon] or [MultiPolygon]and determines if the
 /// [Point] resides inside the [Polygon]. The polygon can be convex or concave.
@@ -58,11 +58,11 @@ bool booleanPointInPolygon(Position point, GeoJSONObject polygon,
 
   var result = false;
   for (var i = 0; i < polys!.length; ++i) {
-    var polyResult =
-        pip(Point(coordinates: point), Polygon(coordinates: polys[i]));
-    if (polyResult == 0) {
+    var polyResult = pointInPolygon(
+        Point(coordinates: point), Polygon(coordinates: polys[i]));
+    if (polyResult == PointInPolygonResult.isOnEdge) {
       return ignoreBoundary ? false : true;
-    } else if (polyResult) {
+    } else if (polyResult == PointInPolygonResult.isInside) {
       result = true;
     }
   }
diff --git a/lib/src/line_intersect.dart b/lib/src/line_intersect.dart
index 48a84e7..29f047d 100644
--- a/lib/src/line_intersect.dart
+++ b/lib/src/line_intersect.dart
@@ -1,3 +1,4 @@
+import 'package:sweepline_intersections/sweepline_intersections.dart';
 
 import '../helpers.dart';
 
@@ -8,71 +9,61 @@ import '../helpers.dart';
 /// example:
 /// ```dart
 /// var line1 = LineString(coordinates:[
-///    Position.of([126, -11]), 
+///    Position.of([126, -11]),
 ///    Position.of([129, -21]),
 ///  ]);
 /// var line2 = LineString(coordinates:[
-///  Position.of([123, -18]), 
+///  Position.of([123, -18]),
 ///  Position.of([131, -14]),
 ///  ]);
 /// var intersects = lineIntersect(line1, line2);
 /// //addToMap
 /// var addToMap = [line1, line2, intersects]
-FeatureCollection<Point>  lineIntersect(
-  GeoJSONObject line1,
- GeoJSONObject line2,
-{
-   bool removeDuplicates = true,
-  bool  ignoreSelfIntersections = false
-  }
-){
-  var features= <Feature>[];
-  if (line1 is FeatureCollection)
-{    features = features..addAll(line1.features);
-}  else if (line1 is Feature) {features.add(line1);}
-  else if (
-    line1 is LineString ||
-    line1 is Polygon ||
-    line1 is MultiLineString ||
-    line1 is MultiPolygon
-  ) {
+FeatureCollection<Point> lineIntersect(GeoJSONObject line1, GeoJSONObject line2,
+    {bool removeDuplicates = true, bool ignoreSelfIntersections = false}) {
+  var features = <Feature>[];
+  if (line1 is FeatureCollection) {
+    features = features..addAll(line1.features);
+  } else if (line1 is Feature) {
+    features.add(line1);
+  } else if (line1 is LineString ||
+      line1 is Polygon ||
+      line1 is MultiLineString ||
+      line1 is MultiPolygon) {
     features.add(Feature(geometry: line1 as GeometryObject));
   }
 
-  if (line2 is FeatureCollection)
-    {features = features..addAll(line2.features);}
-  else if (line2 is Feature) {features.add(line2);}
-  else if (
-    line2 is LineString ||
-    line2 is Polygon ||
-    line2 is MultiLineString ||
-    line2 is MultiPolygon
-  ) {
+  if (line2 is FeatureCollection) {
+    features = features..addAll(line2.features);
+  } else if (line2 is Feature) {
+    features.add(line2);
+  } else if (line2 is LineString ||
+      line2 is Polygon ||
+      line2 is MultiLineString ||
+      line2 is MultiPolygon) {
     features.add(Feature(geometry: line2 as GeometryObject));
   }
 
-  var intersections = findIntersections(
-    FeatureCollection(features: features),
-    ignoreSelfIntersections
-  );
+  var intersections = sweeplineIntersections(
+      FeatureCollection(features: features), ignoreSelfIntersections);
 
-  var results: Intersection[] = [];
+  var results = [];
   if (removeDuplicates) {
-    const unique: Record<string, boolean> = {};
-    intersections.forEach((intersection) => {
-      var key = intersection.join(",");
-      if (!unique[key]) {
-        unique[key] = true;
-        results.push(intersection);
+    Set unique = {};
+    intersections.forEach((intersection) {
+      if (!unique.contains(intersection)) {
+        unique.add(intersection);
+        results.add(intersection);
       }
     });
   } else {
     results = intersections;
   }
-  return FeatureCollection(features: results.map((r) => Feature(geometry: Point(coordinates:r))));
+  return FeatureCollection(
+      features: results
+          .map((r) => Feature(geometry: Point(coordinates: r)))
+          .toList());
 }
-
-
 /** 
  * import { feature, featureCollection, point } from "@turf/helpers";
 import {
diff --git a/pubspec.yaml b/pubspec.yaml
index 0529e9f..3d3f055 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -10,6 +10,10 @@ publish_to: none
 dependencies:
   json_annotation: ^4.4.0
   turf_equality: ^0.0.1
+  sweepline_intersections:
+    git: https://github.com/dartclub/sweepline_intersections.git
+  turf_pip: ^0.0.1+1
+
 dev_dependencies:
   dartclub_lint: ^0.4.2
   test: ^1.19.3
diff --git a/test/booleans/disjoint_test.dart b/test/booleans/disjoint_test.dart
index 369df33..df6c808 100644
--- a/test/booleans/disjoint_test.dart
+++ b/test/booleans/disjoint_test.dart
@@ -7,9 +7,9 @@ import 'package:turf/src/booleans/boolean_disjoint.dart';
 
 main() {
   group(
-    'boolean_crosses',
+    'boolean_disjoint',
     () {
-      var inDir = Directory('./test/examples/booleans/disjoint/true');
+      var inDir = Directory('./test/examples/booleans/disjoint/test/true');
       for (var file in inDir.listSync(recursive: true)) {
         if (file is File && file.path.endsWith('.geojson')) {
           test(
@@ -26,7 +26,8 @@ main() {
             },
           );
           // False Fixtures
-          var inDir1 = Directory('./test/examples/booleans/disjoint/false');
+          var inDir1 =
+              Directory('./test/examples/booleans/disjoint/test/false');
           for (var file in inDir1.listSync(recursive: true)) {
             if (file is File && file.path.endsWith('.geojson')) {
               test(
diff --git a/test/booleans/intersect_test.dart b/test/booleans/intersect_test.dart
index 4540ac4..f062ff7 100644
--- a/test/booleans/intersect_test.dart
+++ b/test/booleans/intersect_test.dart
@@ -2,7 +2,7 @@ import 'package:test/test.dart';
 import 'package:turf/helpers.dart';
 import 'package:turf/src/booleans/boolean_intersect.dart';
 
-// main() {
+main() {
   var featureCollection = FeatureCollection(features: [
     Feature(
         properties: {"fill": "#ff0000"},