mapnik

Mapnik's C++ shared library provides efficient algorithms for spatial data processing, enabling fast rendering of large geographic datasets, as stated in the README.

It has no OS-specific windowing system dependencies, allowing deployment on any server environment, which is emphasized for web-based development in the project description.

Designed to perform well in concurrent applications, making it suitable for scalable server-side mapping solutions, as mentioned in the README.

Organized around objects like maps, layers, and datasources, offering flexibility in application design, as described in the key features.