BMapGL is not defined

The error message "BMapGL is not defined" typically occurs when the Baidu Map JavaScript API library is not properly loaded or initialized. To fix this issue, you need to ensure that the Baidu Map library is included and loaded correctly before using any BMapGL related functions or objects.

Here are a few steps to troubleshoot the problem:

1. Confirm that you have included the Baidu Map JavaScript API library in your HTML file. You can include it by adding the following line inside the head section of your HTML file:

   <script src="https://api.map.baidu.com/api?v=2.0&ak=YOUR_API_KEY"></script>

Make sure to replace "YOUR_API_KEY" with your actual Baidu Map API key.

2. Check if there are any typos or errors in the JavaScript code where you are trying to use BMapGL. Ensure that the variable name is correct and that you have properly initialized it.

3. Verify that the BMapGL object is available in the global scope. You can do this by checking if "BMapGL" is defined before using it:

   if (typeof BMapGL !== 'undefined') {
     // BMapGL is defined, you can use it here
   } else {
     // BMapGL is not defined, there might be an issue with loading the Baidu Map library
   }

If none of these steps resolve the issue, please provide more information about your code and how you are using BMapGL so that I can assist you further.