February 10, 2026 Introduction libgd-gis now supports legends, introducing a fundamental building block in map communication. With the release of v0.4.1, legends become a first-class feature of the rendering pipeline, pushing the library one step closer to covering the essential capabilities expected from a modern GIS engine. Legends are not just a visual accessory. They…

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libgd-gis v0.4.1 introduces built-in legend support for server-side map rendering in Ruby. The library treats maps as finished visual artifacts rather than interactive UI components, following a clean pipeline: geographic data → style rules → rendering → optional post-processing. Legends are rendered directly into images using the same style configuration as map labels, ensuring consistency. The approach enables generating self-describing, shareable map images entirely server-side without JavaScript, headless browsers, or frontend dependencies.

When Maps Explain Themselves: Legends, Style, and Finished Images in Ruby

libgd-gis — Server-side map rendering for Ruby