如果您需要自动执行产生图像的过程，像PhantomJS这样的工具可以帮助您编写一个脚本来自动获取网页截图（您使用Google Maps JavaScript API绘制的截图）。

If you need to automate the process which produces the image, a tool like PhantomJS can help you write a script to automatically take a screenshot of a webpage (which you've drawn using the Google Maps JavaScript API).

http://phantomjs.org/screen- capture.html