diff --git a/src/Obj/Base/PolylineObject/index.js b/src/Obj/Base/PolylineObject/index.js
index 86b5b87..bf652c8 100644
--- a/src/Obj/Base/PolylineObject/index.js
+++ b/src/Obj/Base/PolylineObject/index.js
@@ -23,7 +23,7 @@ class PolylineObject extends Base {
    * @description 折线
    * @param options {object} 线属性
    * @param options.name{string} 名称
-   * @param options.width=3{number} 线宽
+   * @param options.width   * @param options.width=3{number} 线宽
    * @param options.color=#ff0000 {string} 颜色
    * @param options.type=0 {number} 材质类型 0-实线 1-虚线 2-泛光
    * @param options.heightMode=2{number} 高度模式（0：海拔高度；1：相对高度；2：依附模式）
@@ -261,6 +261,7 @@ class PolylineObject extends Base {
             break
           default:
             this.length = this.noseToTail ? this.options.fitLengthByMeter : this.options.lengthByMeter
+            break
         }
       } else {
         let length = this.noseToTail ? this.options.fitLengthByMeter : this.options.lengthByMeter
@@ -279,7 +280,6 @@ class PolylineObject extends Base {
       })
 
     let _this = this
-
     if (!this.noseToTail) {
       this.computeDistance(
         this.options.positions,
@@ -294,12 +294,10 @@ class PolylineObject extends Base {
           _this.length = res
           _this.lengthUnit = '米'
         }
-
       })
     } else {
-
+      let fromDegreesArray = this.renewPositions(this.options.positions)
     }
-
   }
 
   get fitLengthUnit() {
@@ -478,16 +476,20 @@ class PolylineObject extends Base {
     }
     if (v) {
       if (this.options.fitLengthByMeter > 1000 || this.options.fitLengthByMeter == 1000) {
-        document.getElementsByClassName('input-select-unit')[1].querySelectorAll('dd')[1].click()
+        let dom = document.getElementsByClassName('input-select-unit')[1]
+        dom && dom.querySelectorAll('dd')[1] && dom.querySelectorAll('dd')[1].click()
       } else {
-        document.getElementsByClassName('input-select-unit')[1].querySelectorAll('dd')[0].click()
+        let dom = document.getElementsByClassName('input-select-unit')[1]
+        dom && dom.querySelectorAll('dd')[0] && dom.querySelectorAll('dd')[0].click()
       }
 
     } else {
       if (this.options.lengthByMeter > 1000 || this.options.lengthByMeter == 1000) {
-        document.getElementsByClassName('input-select-unit')[1].querySelectorAll('dd')[1].click()
+        let dom = document.getElementsByClassName('input-select-unit')[1]
+        dom && dom.querySelectorAll('dd')[1] && dom.querySelectorAll('dd')[1].click()
       } else {
-        document.getElementsByClassName('input-select-unit')[1].querySelectorAll('dd')[0].click()
+        let dom = document.getElementsByClassName('input-select-unit')[1]
+        dom && dom.querySelectorAll('dd')[0] && dom.querySelectorAll('dd')[0].click()
       }
     }
   }
@@ -554,7 +556,7 @@ class PolylineObject extends Base {
     //   2,
     //   ground
     // )
-    this.lengthUnit = this.lengthUnit
+    // this.lengthUnit = this.lengthUnit
     this._elms.heightMode && (this._elms.heightMode.value = heightModeName)
     this._elms.heightModeObject && (this._elms.heightModeObject.legp_searchActive(
       heightModeName
@@ -810,29 +812,6 @@ class PolylineObject extends Base {
           }, //点击确认按钮事件回调
           clear: () => {
             this.labelLineColor = 'rgba(0,255,255,0.5)'
-          } //点击清空按钮事件回调
-        })
-        this._elms.labelLineColor[i] = lineColorPicker
-      })
-    }
-  }
-
-  get labelBackgroundColorStart() {
-    return this.options.label.backgroundColor[0]
-  }
-  set labelBackgroundColorStart(v) {
-    this.options.label.backgroundColor[0] = v
-    this.label.backgroundColor = [v, this.label.backgroundColor[1]]
-    if (this._elms.labelBackgroundColorStart) {
-      this._elms.labelBackgroundColorStart.forEach((item, i) => {
-        let labelBackgroundColorStartPicker = new ewPlugins('colorpicker', {
-          el: item.el,
-          size: 'mini', //颜色box类型
-          alpha: true, //是否开启透明度
-          defaultColor: this.labelBackgroundColorStart,
-          disabled: false, //是否禁止打开颜色选择器
-          openPickerAni: 'opacity', //打开颜色选择器动画
-          sure: color => {
             this.labelBackgroundColorStart = color
           }, //点击确认按钮事件回调
           clear: () => {
@@ -2178,7 +2157,8 @@ class PolylineObject extends Base {
         2,
         this.options['words-name']
       ).then(res => {
-        _this.options.fitLengthByMeter
+        _this.options.fitLengthByMeter = res
+        _this.lengthUnit = _this.options['length-unit']
       })
     } else {
       let _this = this
@@ -2187,17 +2167,18 @@ class PolylineObject extends Base {
         2,
         this.options['words-name']
       ).then(res => {
-        _this.options.fitLengthByMeter
+        _this.options.fitLengthByMeter = res
+        _this.lengthUnit = _this.options['length-unit']
       })
     }
-    this.fitLengthUnit = this.options['fit-length-unit']
+
     let _this = this
     this.computeDistance(
       positions,
       2,
       this.options['words-name']
     ).then(res => {
-      _this.options.lengthByMeter
+      _this.options.lengthByMeter = res
       _this.lengthUnit = this.options['length-unit']
     })
     return fromDegreesArray
diff --git a/src/Tools/index.js b/src/Tools/index.js
index 95fad91..8d3ba38 100644
--- a/src/Tools/index.js
+++ b/src/Tools/index.js
@@ -212,22 +212,12 @@ class Tools {
             arr.push(r)
           }
           let l = arr.length - 1
-          arr.forEach((item, index) => {
-            if (index !== l) {
-              let posi = [item.position, arr[index + 1].position]
-              let d1 = 0
-              for (let i = 0; i < posi.length - 1; i++) {
-                const position1 = Cesium.Cartesian3.fromDegrees(posi[i].lng, posi[i].lat, posi[i].alt);
-                const position2 = Cesium.Cartesian3.fromDegrees(posi[i + 1].lng, posi[i + 1].lat, posi[i + 1].alt);
-                const distance = Cesium.Cartesian3.distance(position1, position2);
-                d1 = d1 + distance
-              }
-
-              let d2 = Math.abs(item.position.alt - arr[index + 1].position.alt)
-              let d3 = Math.sqrt(d1 * d1 + d2 * d2)
-              length += d3
-            }
-          })
+          for (let i = 0; i < arr.length - 1; i++) {
+            const position1 = Cesium.Cartesian3.fromDegrees(arr[i].position.lng, arr[i].position.lat, 0);
+            const position2 = Cesium.Cartesian3.fromDegrees(arr[i + 1].position.lng, arr[i + 1].position.lat, 0);
+            const distance = Cesium.Cartesian3.distance(position1, position2);
+            length = length + distance
+          }
           break
         default:
           break;
@@ -1273,7 +1263,7 @@ class Tools {
 
   replaceHost(url, host) {
     let newUrl = url
-    if(!url || !host) {
+    if (!url || !host) {
       return url
     }
     try {
diff --git a/static/img/arrow/1.png b/static/img/arrow/1.png
index a959a24..650bc1f 100644
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diff --git a/static/img/arrow/2.png b/static/img/arrow/2.png
index 1c1985a..a92774d 100644
Binary files a/static/img/arrow/2.png and b/static/img/arrow/2.png differ
diff --git a/static/img/arrow/3.png b/static/img/arrow/3.png
index 895389c..ffd053d 100644
Binary files a/static/img/arrow/3.png and b/static/img/arrow/3.png differ
diff --git a/static/img/arrow/4.png b/static/img/arrow/4.png
index dcd6705..b3cbe70 100644
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diff --git a/static/img/arrow/5.png b/static/img/arrow/5.png
index f444e83..374af4a 100644
Binary files a/static/img/arrow/5.png and b/static/img/arrow/5.png differ
diff --git a/static/img/arrow/6.png b/static/img/arrow/6.png
index a1b7f9a..eca7083 100644
Binary files a/static/img/arrow/6.png and b/static/img/arrow/6.png differ