diff --git a/docs/api/component/control.zh.md b/docs/api/component/control.zh.md
index fc4a87130b..b380b3a851 100644
--- a/docs/api/component/control.zh.md
+++ b/docs/api/component/control.zh.md
@@ -17,7 +17,7 @@ L7 目前支持 Control
 
 #### option
 
-position: `string` 控件位置支持是个方位
+position: `string` 控件位置支持 8 个方位
 
 - bottomright
 - topright
diff --git a/docs/api/scene.zh.md b/docs/api/scene.zh.md
index b98a548ef2..bf0929e34e 100644
--- a/docs/api/scene.zh.md
+++ b/docs/api/scene.zh.md
@@ -492,6 +492,8 @@ scene.setPitch(pitch);
 ### setMapStatus 设置地图状态
 可用来关闭地图的一些交互操作
 
+可用来关闭地图的一些交互操作
+
 参数 :
 
 ```javascript
@@ -526,7 +528,7 @@ scene.fitBounds([
 ]);
 ```
 
-### containerToLngLat
+### containerToLngLat 画布坐标转经纬度
 
 画布坐标转经纬度坐标
 
@@ -537,17 +539,21 @@ scene.fitBounds([
 scene.pixelToLngLat([10,10]);
 ```
 
-### lngLatToContainer
+### lngLatToContainer 经纬度转画布坐标
+
 经纬度坐标转画布坐标
 
 参数 :
+
 - lnglat 经纬度坐标 [lng,lat ] {array }
 
 ```
 scene.lngLatToPixel([120,10]);
 
 ```
-### pixelToLngLat
+
+### pixelToLngLat 像素坐标转经纬度
+
 像素坐标：不同级别下地图上某点的位置
 地图像素坐标转经纬度坐标
 
@@ -558,10 +564,12 @@ scene.lngLatToPixel([120,10]);
 scene.pixelToLngLat([10,10]);
 ```
 
-### lngLatToPixel
+### lngLatToPixel 经纬度转像素坐标
+
 经纬度坐标转像素坐标
 
 参数 :
+
 - lnglat 经纬度坐标 [lng,lat ] {array }
 
 ```
diff --git a/examples/tutorial/control/demo/amap.js b/examples/tutorial/control/demo/amap.js
index 9681718efc..6bfe4d0b8b 100644
--- a/examples/tutorial/control/demo/amap.js
+++ b/examples/tutorial/control/demo/amap.js
@@ -36,15 +36,17 @@ scene.on('loaded', () => {
         气泡图: pointLayer
       };
       const layersControl = new Layers({
-        overlayers
+        overlayers,
+        position: 'rightcenter'
       });
 
       scene.addControl(layersControl);
     });
 
   const zoomControl = new Zoom({
-    position: 'topright'
+    position: 'rightcenter'
   });
+
   const scaleControl = new Scale({
     position: 'bottomright'
   });
diff --git a/packages/layers/src/plugins/FeatureScalePlugin.ts b/packages/layers/src/plugins/FeatureScalePlugin.ts
index 13977d59d3..a02785cd3e 100644
--- a/packages/layers/src/plugins/FeatureScalePlugin.ts
+++ b/packages/layers/src/plugins/FeatureScalePlugin.ts
@@ -68,9 +68,6 @@ export default class FeatureScalePlugin implements ILayerPlugin {
       this.scaleOptions = layer.getScaleOptions();
       const attributes = styleAttributeService.getLayerStyleAttributes();
       const { dataArray } = layer.getSource().data;
-      // if (dataArray.length === 0) {
-      //   return;
-      // }
       this.caculateScalesForAttributes(attributes || [], dataArray);
       layer.layerModelNeedUpdate = true;
       return true;
diff --git a/packages/layers/src/plugins/LayerStylePlugin.ts b/packages/layers/src/plugins/LayerStylePlugin.ts
index 56395c1ebd..aa02a8b6df 100644
--- a/packages/layers/src/plugins/LayerStylePlugin.ts
+++ b/packages/layers/src/plugins/LayerStylePlugin.ts
@@ -1,5 +1,4 @@
 import { ILayer, ILayerPlugin, IMapService, TYPES } from '@antv/l7-core';
-import Source from '@antv/l7-source';
 import { encodePickingColor, rgb2arr } from '@antv/l7-utils';
 import { injectable } from 'inversify';
 import 'reflect-metadata';
diff --git a/packages/layers/src/point/models/text.ts b/packages/layers/src/point/models/text.ts
index 973d07245e..03d1506cd7 100644
--- a/packages/layers/src/point/models/text.ts
+++ b/packages/layers/src/point/models/text.ts
@@ -384,7 +384,7 @@ export default class TextModel extends BaseModel {
     const characterSet: string[] = [];
     data.forEach((item: IEncodeFeature) => {
       let { shape = '' } = item;
-      shape = shape.toString();
+      shape = `${shape}`;
       if (characterSet.indexOf(shape) === -1) {
         characterSet.push(shape);
       }
diff --git a/packages/source/src/source.ts b/packages/source/src/source.ts
index ad2774bb2f..95b186c1a1 100644
--- a/packages/source/src/source.ts
+++ b/packages/source/src/source.ts
@@ -25,7 +25,7 @@ import { cloneDeep, isFunction, isString, mergeWith } from 'lodash';
 // @ts-ignore
 // tslint:disable-next-line:no-submodule-imports
 import Supercluster from 'supercluster/dist/supercluster';
-import { getParser, getTransform } from './';
+import { getParser, getTransform } from './factory';
 import { cluster } from './transform/cluster';
 import { statMap } from './utils/statistics';
 import { getColumn } from './utils/util';