3D Rendering Engine
From C++ desktop engines to WebGL in the browser — materials, lighting, post-processing and large-scene performance.
WebGL / GLSLC++ / OpenGLMaterials & postPerformance
XIAO AN · 3D GEO-ENGINEER
The real world,made computable,and renderable.
I'm XIAO AN, a 3D geospatial engineer. I focus on rendering engines, GIS geometry, 3D modeling and HD map data production. Currently a Senior Map Engineer at Amap.
3D
Rendering engine
GIS
Geometry & spatial analysis
HD
HD map & 3D reconstruction
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01 · Capabilities
Explore focusFour problem spaces in 3D
Rendering, geometry, data and delivery. Not a list of tools, but the problems that keep appearing in spatial systems.
GIS Geometry
Turning spatial queries, geometry editing, cross-sections and overlay analysis into stable engine capabilities.
Spatial analysisGeometry editingCoordinates & tilesPipelines / flood
HD Map & 3D Reconstruction
Building editor tooling and semi-automated 3D model production for data at scale.
HD map3D modelingSemi-automatedQuality checks
Full-stack Delivery
From data production tools to front-end experiences, connecting technical design with real projects and teams.
TypeScriptNode.jsToolingEngineering
02 · Selected Work
All projectsThree spatial problem spaces
3D engines, GIS geometry and HD map data production — publicly shareable approaches, key design decisions and trade-offs.
03 · Writing
All articlesNotes from the field
Cesium, WebGL, GIS data and front-end engineering. I write down the problem, the approach and the trade-offs — not just the code.
Batch Migrating Cesium Sandcastle Demos
Using Node.js, Selenium, jsdom and regex to batch-migrate Cesium Sandcastle demos, fixing paths, styles, data sources and entry points.
Cesium Globe + Panorama Integration
Reusing Cesium's WebGL render pipeline to blend a 3D globe with a panoramic view, without third-party libraries.
Cesium Demo Index (Archive)
An index of early 3D engine demos covering first-person navigation, geometry editing, pipelines, flood simulation and satellite trajectories. The original demos are offline; this remains a technical index.
04 · Lab
Spatial utilities, built to be useful
Small browser-only tools. Useful for myself, and a quick look at the engineering behind them.
Coordinate and tile calculations, entirely client-sideA growing index of Cesium demosGeoJSON validation and a model viewer are next
Enter LabCoordinate
Coordinate conversion
WGS84 / GCJ02 / BD09, entirely client-side.
Open tool →TileTile calculator
Latitude/longitude ↔ XYZ / TMS tile numbers.
Open tool →IndexCesium demo index
A structured index of early 3D engine demos.
Open tool →More
More coming
More spatial tools and data-production utilities will land here.
Stay tuned