diff --git a/package-lock.json b/package-lock.json
index 14ad8bd17a..397c57c7c6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,6 +9,7 @@
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       "license": "Apache-2.0",
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@@ -20,7 +21,6 @@
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@@ -3691,6 +3673,15 @@
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@@ -7842,23 +7760,6 @@
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@@ -14344,23 +14113,6 @@
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@@ -14373,16 +14125,6 @@
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       "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-3.0.0.tgz",
@@ -14583,16 +14325,6 @@
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-      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
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       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-2.0.0.tgz",
@@ -14600,13 +14332,6 @@
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-      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
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       "resolved": "https://registry.npmjs.org/file-entry-cache/-/file-entry-cache-10.1.4.tgz",
@@ -14639,34 +14364,6 @@
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-      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
-      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
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-      "license": "MIT",
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       "resolved": "https://registry.npmjs.org/stylus/-/stylus-0.64.0.tgz",
@@ -14828,23 +14525,6 @@
         "url": "https://github.com/sponsors/epoberezkin"
       }
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-    "node_modules/table/node_modules/ansi-regex": {
-      "version": "5.0.1",
-      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
-      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
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-    "node_modules/table/node_modules/emoji-regex": {
-      "version": "8.0.0",
-      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
-      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
-      "dev": true,
-      "license": "MIT"
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     "node_modules/table/node_modules/json-schema-traverse": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-1.0.0.tgz",
@@ -14852,34 +14532,6 @@
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       "license": "MIT"
     },
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-      "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
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-      "dev": true,
-      "license": "MIT",
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-        "is-fullwidth-code-point": "^3.0.0",
-        "strip-ansi": "^6.0.1"
-      },
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-    "node_modules/table/node_modules/strip-ansi": {
-      "version": "6.0.1",
-      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
-      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "ansi-regex": "^5.0.1"
-      },
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     "node_modules/tapable": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/tapable/-/tapable-2.3.0.tgz",
@@ -15319,9 +14971,7 @@
       "version": "2.8.1",
       "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.8.1.tgz",
       "integrity": "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==",
-      "dev": true,
-      "license": "0BSD",
-      "optional": true
+      "license": "0BSD"
     },
     "node_modules/tunnel-agent": {
       "version": "0.6.0",
@@ -15783,9 +15433,9 @@
       }
     },
     "node_modules/vtk.js": {
-      "version": "34.15.0",
-      "resolved": "https://registry.npmjs.org/vtk.js/-/vtk.js-34.15.0.tgz",
-      "integrity": "sha512-FLcSPWMWffBUg4+YhUULw2072/PgLQm6hLhDC+CQ4/RztXglclTkTVavjUA04qlMd1gg+Df1l/J+ezjiWVmfVA==",
+      "version": "34.15.1",
+      "resolved": "https://registry.npmjs.org/vtk.js/-/vtk.js-34.15.1.tgz",
+      "integrity": "sha512-3gK4FNK+in9Q6WAXoQxId5iKjVXS2ck/Xyf9VcCmZYY6DUpro3qs8Iv5qWYmE6HrFvvjbu64lu4Zo2/MZnCnKw==",
       "license": "BSD-3-Clause",
       "optional": true,
       "dependencies": {
@@ -16278,55 +15928,6 @@
         "string-width": "^1.0.2 || 2 || 3 || 4"
       }
     },
-    "node_modules/wide-align/node_modules/ansi-regex": {
-      "version": "5.0.1",
-      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
-      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "engines": {
-        "node": ">=8"
-      }
-    },
-    "node_modules/wide-align/node_modules/emoji-regex": {
-      "version": "8.0.0",
-      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
-      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
-      "dev": true,
-      "license": "MIT",
-      "optional": true
-    },
-    "node_modules/wide-align/node_modules/string-width": {
-      "version": "4.2.3",
-      "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
-      "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "dependencies": {
-        "emoji-regex": "^8.0.0",
-        "is-fullwidth-code-point": "^3.0.0",
-        "strip-ansi": "^6.0.1"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
-    "node_modules/wide-align/node_modules/strip-ansi": {
-      "version": "6.0.1",
-      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
-      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "dependencies": {
-        "ansi-regex": "^5.0.1"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/wildcard": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/wildcard/-/wildcard-2.0.1.tgz",
@@ -16407,25 +16008,6 @@
       }
     },
     "node_modules/wrap-ansi": {
-      "version": "8.1.0",
-      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-8.1.0.tgz",
-      "integrity": "sha512-si7QWI6zUMq56bESFvagtmzMdGOtoxfR+Sez11Mobfc7tm+VkUckk9bW2UeffTGVUbOksxmSw0AA2gs8g71NCQ==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "ansi-styles": "^6.1.0",
-        "string-width": "^5.0.1",
-        "strip-ansi": "^7.0.1"
-      },
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/wrap-ansi?sponsor=1"
-      }
-    },
-    "node_modules/wrap-ansi-cjs": {
-      "name": "wrap-ansi",
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz",
       "integrity": "sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==",
@@ -16443,64 +16025,6 @@
         "url": "https://github.com/chalk/wrap-ansi?sponsor=1"
       }
     },
-    "node_modules/wrap-ansi-cjs/node_modules/ansi-regex": {
-      "version": "5.0.1",
-      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
-      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": ">=8"
-      }
-    },
-    "node_modules/wrap-ansi-cjs/node_modules/emoji-regex": {
-      "version": "8.0.0",
-      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
-      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
-      "dev": true,
-      "license": "MIT"
-    },
-    "node_modules/wrap-ansi-cjs/node_modules/string-width": {
-      "version": "4.2.3",
-      "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
-      "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "emoji-regex": "^8.0.0",
-        "is-fullwidth-code-point": "^3.0.0",
-        "strip-ansi": "^6.0.1"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
-    "node_modules/wrap-ansi-cjs/node_modules/strip-ansi": {
-      "version": "6.0.1",
-      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
-      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "ansi-regex": "^5.0.1"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
-    "node_modules/wrap-ansi/node_modules/ansi-styles": {
-      "version": "6.2.3",
-      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-6.2.3.tgz",
-      "integrity": "sha512-4Dj6M28JB+oAH8kFkTLUo+a2jwOFkuqb3yucU0CANcRRUbxS0cP0nZYCGjcc3BNXwRIsUVmDGgzawme7zvJHvg==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
-      }
-    },
     "node_modules/wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
@@ -16623,51 +16147,6 @@
         "node": ">=10"
       }
     },
-    "node_modules/yargs/node_modules/ansi-regex": {
-      "version": "5.0.1",
-      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
-      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": ">=8"
-      }
-    },
-    "node_modules/yargs/node_modules/emoji-regex": {
-      "version": "8.0.0",
-      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
-      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
-      "dev": true,
-      "license": "MIT"
-    },
-    "node_modules/yargs/node_modules/string-width": {
-      "version": "4.2.3",
-      "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
-      "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "emoji-regex": "^8.0.0",
-        "is-fullwidth-code-point": "^3.0.0",
-        "strip-ansi": "^6.0.1"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
-    "node_modules/yargs/node_modules/strip-ansi": {
-      "version": "6.0.1",
-      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
-      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "ansi-regex": "^5.0.1"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/yocto-queue": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
diff --git a/package.json b/package.json
index e690ba10ec..8beb1d0443 100644
--- a/package.json
+++ b/package.json
@@ -12,6 +12,7 @@
     "url": "https://github.com/OpenGeoscience/geojs"
   },
   "dependencies": {
+    "@velipso/polybool": "^2.0.11",
     "canvas": "^3.0.0",
     "color-name": "^2.0.0",
     "docdash": "^2.0.1",
@@ -23,7 +24,6 @@
     "jquery": "^3.6.0",
     "kdbush": "^4.0.0",
     "mousetrap": "^1.6.5",
-    "polybooljs": "git+https://github.com/manubb/polybooljs#eps-logic",
     "proj4": "^2.7.5"
   },
   "optionalDependencies": {
@@ -54,7 +54,7 @@
     "expose-loader": "^5.0.0",
     "express": "^5.1.0",
     "fs-extra": "^11.0.0",
-    "glob": "^12.0.0",
+    "glob": "^13.0.0",
     "globals": "^16.0.0",
     "imports-loader": "^5.0.0",
     "jasmine-core": "^5.0.0",
@@ -106,7 +106,7 @@
       "cross-spawn": "^7.0.5"
     },
     "stylus": {
-      "glob": "^12.0.0"
+      "glob": "^13.0.0"
     },
     "vtk.js": {
         "xmlbuilder2": "^4.0.0"
diff --git a/src/polygonFeature.js b/src/polygonFeature.js
index 350300b08f..ce706322c6 100644
--- a/src/polygonFeature.js
+++ b/src/polygonFeature.js
@@ -122,11 +122,11 @@ var polygonFeature = function (arg) {
       if (!poly) {
         return undefined;
       }
-      var outer, inner, range, coord, j, x, y, mapouter, mapinner, maprange;
+      var outer, inner, range, coord,  x, y, mapouter, mapinner, maprange;
 
       coord = poly.outer || (Array.isArray(poly) ? poly : []);
       outer = new Array(coord.length);
-      for (j = 0; j < coord.length; j += 1) {
+      for (let j = 0; j < coord.length; j += 1) {
         outer[j] = posFunc.call(m_this, coord[j], j, d, i);
         x = outer[j].x;
         y = outer[j].y;
@@ -142,14 +142,14 @@ var polygonFeature = function (arg) {
       inner = (poly.inner || []).map(function (hole) {
         coord = hole || [];
         var trans = new Array(coord.length);
-        for (j = 0; j < coord.length; j += 1) {
+        for (let j = 0; j < coord.length; j += 1) {
           trans[j] = posFunc.call(m_this, coord[j], j, d, i);
         }
         return trans;
       });
       mapouter = transform.transformCoordinates(fcs, mapgcs, outer);
       mapinner = inner.map(part => transform.transformCoordinates(fcs, mapgcs, part));
-      for (j = 0; j < mapouter.length; j += 1) {
+      for (let j = 0; j < mapouter.length; j += 1) {
         x = mapouter[j].x;
         y = mapouter[j].y;
         if (!j) {
diff --git a/src/util/polyops.js b/src/util/polyops.js
index 5d215d671a..a06ac45952 100644
--- a/src/util/polyops.js
+++ b/src/util/polyops.js
@@ -1,4 +1,5 @@
-var PolyBool = require('polybooljs');
+const { PolyBool, GeometryEpsilon } = require('@velipso/polybool');
+const polybool = new PolyBool();
 var geo_map = require('../map');
 var util = require('../util/common');
 
@@ -106,7 +107,7 @@ function seglistToPolygonList(seglist) {
   const borders = []; // polygons in format needed for util.pointInPolygon
   const regions = []; // polygons in end result format
   const parents = []; // list of parents of each polygon
-  seglist.forEach((s) => PolyBool.polygon(s).regions.forEach((r) => {
+  seglist.forEach((s) => polybool.polygon(s).regions.forEach((r) => {
     const border = r.map((pt) => ({x: pt[0], y: pt[1]}));
     if (border.length < 3) {
       return;
@@ -162,7 +163,7 @@ function seglistToPolygonList(seglist) {
  */
 function polygonOperationSeglist(op, epsilon, seglist) {
   op = 'select' + op.charAt(0).toUpperCase() + op.slice(1);
-  PolyBool.epsilon(epsilon);
+  const polyboolEps1 = new PolyBool(new GeometryEpsilon(epsilon));
 
   while (seglist.length > 1) {
     const newlist = [];
@@ -172,26 +173,19 @@ function polygonOperationSeglist(op, epsilon, seglist) {
       if (i + half < seglist.length) {
         let nextseg = seglist[i + half];
         try {
-          segments = PolyBool.combine(segments, nextseg);
+          segments = polyboolEps1.combine(segments, nextseg);
         } catch (err) {
-          segments = PolyBool.segments(PolyBool.polygon(segments));
-          nextseg = PolyBool.segments(PolyBool.polygon(nextseg));
+          segments = polyboolEps1.segments(polyboolEps1.polygon(segments));
+          nextseg = polyboolEps1.segments(polyboolEps1.polygon(nextseg));
           for (let j = 20; j >= 6; j -= 1) {
-            PolyBool.epsilon(Math.pow(0.1, j));
+            const polyboolEps2 = new PolyBool(new GeometryEpsilon(Math.pow(0.1, j)));
             try {
-              segments = PolyBool.combine(segments, nextseg);
+              segments = polyboolEps2.combine(segments, nextseg);
               break;
             } catch (err) {}
           }
-          PolyBool.epsilon(epsilon);
         }
-        if (segments.combined) {
-          segments.combined = segments.combined.filter(s => Math.abs(s.start[0] - s.end[0]) > epsilon || Math.abs(s.start[1] - s.end[1]) > epsilon);
-          segments = PolyBool[op](segments);
-        } else {
-          console.warn('Failed in polygon functions.');  // eslint-disable-line no-console
-        }
-        segments.segments = segments.segments.filter(s => Math.abs(s.start[0] - s.end[0]) > epsilon || Math.abs(s.start[1] - s.end[1]) > epsilon);
+        segments = polyboolEps1[op](segments);
       }
       newlist.push(segments);
     }
@@ -463,8 +457,8 @@ function generalOperationProcess(op, poly1, poly2, opts) {
   if (ingcs2 && gcs && ingcs2 !== gcs) {
     poly2 = poly2.map((p) => p.map((h) => transform.transformCoordinates(ingcs2, gcs, h)));
   }
-  let seglist1 = poly1.map(p => PolyBool.segments({regions: p}));
-  let seglist2 = poly2.map(p => PolyBool.segments({regions: p}));
+  let seglist1 = poly1.map(p => polybool.segments({regions: p}));
+  let seglist2 = poly2.map(p => polybool.segments({regions: p}));
   seglist1 = polygonOperationSeglist(opts.innerOperation || 'union', mode1.epsilon, seglist1);
   seglist2 = polygonOperationSeglist(opts.innerOperation || 'union', mode2.epsilon, seglist2);
   let seglist = seglist1;
diff --git a/tests/cases/polyops.js b/tests/cases/polyops.js
index 284f7f98e2..30b58db65c 100644
--- a/tests/cases/polyops.js
+++ b/tests/cases/polyops.js
@@ -106,16 +106,16 @@ describe('geo.util.polyops', function () {
     a: [[0, 0], [10, 0], [10, 10], [0, 10]],
     b: [[4, 4], [6, 4], [6, 6], [4, 6]],
     union: {out: [[0, 10], [0, 0], [10, 0], [10, 10]], ca: [[0]], cb: [undefined]},
-    difference: {out: [[[0, 10], [0, 0], [10, 0], [10, 10]], [[6, 6], [6, 4], [4, 4], [4, 6]]], ca: [[0]], cb: [[0]]},
+    difference: {out: [[[0, 10], [0, 0], [10, 0], [10, 10]], [[4, 4], [6, 4], [6, 6], [4, 6]]], ca: [[0]], cb: [[0]]},
     intersect: {out: [[4, 6], [4, 4], [6, 4], [6, 6]], ca: [undefined], cb: [[0]]},
-    xor: {out: [[[0, 10], [0, 0], [10, 0], [10, 10]], [[6, 6], [6, 4], [4, 4], [4, 6]]], ca: [[0]], cb: [[0]]}
+    xor: {out: [[[0, 10], [0, 0], [10, 0], [10, 10]], [[4, 4], [6, 4], [6, 6], [4, 6]]], ca: [[0]], cb: [[0]]}
   }, {
     a: [[0, 0], [10, 0], [10, 10], [0, 10]],
     b: [[-2, -2], [12, -2], [12, 12], [-2, 12]],
     union: {out: [[-2, 12], [-2, -2], [12, -2], [12, 12]], ca: [undefined], cb: [[0]]},
     difference: {out: undefined, ca: [undefined], cb: [undefined]},
     intersect: {out: [[0, 10], [0, 0], [10, 0], [10, 10]], ca: [[0]], cb: [undefined]},
-    xor: {out: [[[-2, 12], [-2, -2], [12, -2], [12, 12]], [[10, 10], [10, 0], [0, 0], [0, 10]]], ca: [[0]], cb: [[0]]}
+    xor: {out: [[[-2, 12], [-2, -2], [12, -2], [12, 12]], [[0, 0], [10, 0], [10, 10], [0, 10]]], ca: [[0]], cb: [[0]]}
   }];
 
   describe('general operations', function () {