A comprehensive monorepo for the maptalks 2D/3D WebGL/WebGPU map rendering engine. It provides a full-stack geospatial visualization framework including core map controls, geometry types (Marker, LineString, Polygon), multiple layer types (Tile, Vector, GLTF, 3D Tiles, Video, Particle), advanced shading (PBR, Phong, Cloth, Subsurface), post-processing (bloom, SSR, TAA, fog, weather), spatial analysis (viewshed, cut, flood, heightmap), traffic simulation, and interactive editing tools. The architecture is modular with ~20 interdependent packages under a pnpm workspace, using a custom WebGL abstraction (fusion.gl) and a vector tile pipeline with worker-based processing. It supports both Canvas2D and WebGL renderers, with emerging WebGPU support via WGSL shaders. The codebase is well-structured with reusable patterns (mixin, painter plugin, worker communication, LRU cache, texture pooling) but shows medium technical drift due to experimental WebGPU code, duplicated utility functions across packages, and reliance on legacy tooling (regl, shelf-pack).