How do I access and test the costmap2Dconvertor ?

[Aishkrish18]

Hello,
I want to convert the elevation map from elevation mapping which is of a gridmap msg to costmap2D. I see that we have a costmap2D convertor from grid map, but I am not very sure how to use it/ run the script by passing my topic to get the costmap 2D. Could someone tell me how to do it, since I am not very familiar with the C++ ROS environment or tell me how I can write the functions to port to python?

Regards,
Aishwarya