wasm-spatial-core — Cesium 3D Tiles in the browser, no upload

Drop a LAS scan → Cesium 3D Tiles, no upload.

Cesium ion wants you to upload customer data. This runs the entire LAS → octree → pnts pipeline in your browser. The data never leaves your machine. Same for GeoTIFF → quantized-mesh terrain and GLB → b3dm tiles.

🛰️ Interactive — drag a .las / .tif / .glb file into the frame

The embed below is the full point-cloud-cesium demo. Click Initialize Cesium (no Ion token needed for the local-pipeline path), then drop a file. Tiles are built in-browser and rendered on the globe.

⚖️ Why this matters

	Cesium ion (SaaS)	Desktop tools	wasm-spatial-core
Customer data leaves browser	☁️ yes (uploaded)	💻 no	💻 no
Intranet / air-gap deploy	❌	per-machine	✅ static files
Per-GB / per-user cost	☁️ yes	license fee	❌ free (MIT)
Streams multi-GB scans	partial	n/a	✅ COPC range fetch

WebGIS compute: 27× faster than Turf.js, in your browser.

Coordinate transforms (WGS-84 ↔ GCJ-02 / BD-09 / Web Mercator / UTM), GeoJSON parsing, and R-Tree spatial index — all WASM-native, no server round-trips. See the Benchmarks tab for head-to-head numbers vs hand-written JS.

🔄 Coordinate Transform sub-section A

📍 Input Coordinates

Select preset or enter custom:

🔄 Transform Results

Select coordinates and click "Transform".

🗺️ Offset Visualization

WGS-84

GCJ-02

BD-09

Web Mercator

📦 GeoJSON Pipeline + Spatial Index sub-section B

📦 Data Source

Dataset: Transform:

📊 Pipeline Stats

Click "Run Pipeline" to begin.

🔍 BBox Search

Run pipeline first.

📍 Nearest Neighbor

Run pipeline first.

🗺️ Map View

Drag a LAS scan → decimate → export 3D Tiles, in-browser.

Browser-side point cloud workbench: voxel-grid decimation (WASM), live WebGL preview, and one-click export of the generated .pnts tileset. No CloudCompare, no server, no upload — useful for triaging customer scans before the heavy pipeline.

☁️ Point Cloud

Synthetic terrain preview with WASM voxel decimation, or drop your own .las / .laz.

Point count: Decimation cell size: Color mode: Point size:

Drop .las / .laz here or click to browse

Three.js viewer → WebGL viewer →

📊 WASM Pipeline Stats

Open this tab to load the interactive preview.

💾 Export new

After running a pipeline (Synthetic / Sample LAS / dropped file), grab the generated Cesium 3D Tiles artifacts. Bytes are produced entirely in-browser; nothing is uploaded.

Run a pipeline first to enable export.

🎨 3D Preview — drag to explore

Left drag rotate · Right drag pan · Scroll zoom · Double-click reset

⏱️ WASM vs JS Benchmark

Operation: Point count:

📊 Results

Click "Run Benchmark" to compare performance.

📈 Visual Comparison

🌍 wasm-spatial-core

Drop a LAS scan → Cesium 3D Tiles, no upload.

WebGIS compute: 27× faster than Turf.js, in your browser.

Drag a LAS scan → decimate → export 3D Tiles, in-browser.