Feature request: Support for EPSG:3857 projection

[moory]

Dear Mapbox,

I hope this message finds you well. I have been using your library and I find it to be a very useful tool for my projects. However, I have noticed that it only supports the EPSG:4326 projection by default. I would like to request a feature that would allow users to select the EPSG:3857 projection as an option.

As you may know, the EPSG:3857 projection is commonly used in web mapping applications such as OpenStreetMap and Google Maps. Having this option available in your library would be beneficial for developers who are working on these types of projects.

Would it be possible to add a parameter option that allows users to choose between EPSG:4326 and EPSG:3857 projections? I believe this would greatly enhance the functionality of your library and make it more versatile for a wider range of applications.

Thank you for your attention to this matter, and I look forward to hearing your thoughts on this feature request.

Best regards,
moory