diff --git a/src/components/app-header/index.tsx b/src/components/app-header/index.tsx
index b113abf..7f516e6 100644
--- a/src/components/app-header/index.tsx
+++ b/src/components/app-header/index.tsx
@@ -294,7 +294,7 @@ export const AppHeader: React.FC<AppHeaderProps> = ({ toolbar }) => {
             <Dropdown
               menu={{
                 items: DropdownMenuItems,
-                onClick: ({ key }) => {
+                onClick: ({ key }: any) => {
                   onDownload(key);
                 },
               }}
diff --git a/src/utils/gcoord.ts b/src/utils/gcoord.ts
index e369824..7cd03db 100644
--- a/src/utils/gcoord.ts
+++ b/src/utils/gcoord.ts
@@ -16,3 +16,35 @@ export const gcj02towgs84 = (feature: Feature) => {
   // @ts-ignore
   return gcoord.transform(feature, gcoord.GCJ02, gcoord.WGS84) as Feature;
 };
+
+export const gcj02tobd09 = (feature: Feature) => {
+  if (feature.geometry.type.match(/polygon/i)) {
+    feature.geometry = JSON.parse(JSON.stringify(feature.geometry));
+  }
+  // @ts-ignore
+  return gcoord.transform(feature, gcoord.GCJ02, gcoord.BD09) as Feature;
+};
+
+export const bd09togcj02 = (feature: Feature) => {
+  if (feature.geometry.type.match(/polygon/i)) {
+    feature.geometry = JSON.parse(JSON.stringify(feature.geometry));
+  }
+  // @ts-ignore
+  return gcoord.transform(feature, gcoord.BD09, gcoord.GCJ02) as Feature;
+};
+
+export const wgs84tobd09 = (feature: Feature) => {
+  if (feature.geometry.type.match(/polygon/i)) {
+    feature.geometry = JSON.parse(JSON.stringify(feature.geometry));
+  }
+  // @ts-ignore
+  return gcoord.transform(feature, gcoord.WGS84, gcoord.BD09) as Feature;
+};
+
+export const bd09towgs84 = (feature: Feature) => {
+  if (feature.geometry.type.match(/polygon/i)) {
+    feature.geometry = JSON.parse(JSON.stringify(feature.geometry));
+  }
+  // @ts-ignore
+  return gcoord.transform(feature, gcoord.BD09, gcoord.WGS84) as Feature;
+};