Mapmost
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Mapmost is a commercial WebGL2 GIS SDK from Suzhou that has shipped Gaussian splat layers since February 2025.
Location
Suzhou, China
Size
Total raised
Hiring?
Platform
WebGL2 JavaScript SDK for the browser
GPU
WebGL2 capable GPU
Pricing
Commercial licence key SDK. Mapmost does not publish list pricing
License
Proprietary
Best for
Streaming Gaussian splat tiles inside a web GIS
Updated
July 2026
Mapmost is a commercial WebGL2 mapping SDK published by Yuance Information Technology in Suzhou, China. It occupies the same slot in a web application as CesiumJS or the ArcGIS Maps SDK for JavaScript, and it has carried gaussian splatting as a native layer type for longer than either.
Splat layers arrived in version 9.4.0 on 28 February 2025, which places Mapmost among the earliest web GIS runtimes to ship the representation rather than demonstrate it. Version 9.5.0 added picking, distance and area measurement through Measure3D, and a frustum culling parameter, so a splat behaves like the rest of the scene graph rather than as a decorative backdrop. Version 9.7.0 was a render performance pass, 9.8.0-beta brought sub metre precision, and 9.11.0-beta added an isMerge option that changes how tiles are batched during streaming.
The tiling story is proprietary. Mapmost 3DGS Builder trains and tiles a capture into an mmgs.json tileset, which the SDK streams with an octree level of detail structure and a per tile depth sort, covering the resulting seams with an edge pixel pass. Version 9.12.0-beta added translate, rotate and scale transforms and coordinate loading from a config file. Version 9.13.0-beta split the pipeline into separate 3DGS and MMGS paths and exposed a depthThreshold control over the sort. A single model layer reads splat, ply or sog in EPSG:3857, and version 9.15.0, released 25 June 2026, added SOG loading to the streamed path.
Recent releases have moved toward scene editing rather than scene loading. Version 9.14.0-beta added brightness, contrast, saturation and opacity controls on a splat layer, and 9.14.1-beta added per building segmentation through a ClassifyAnalysis interface, so an operator can isolate a single structure inside a city scale reconstruction. The current release is 9.16.0, dated 31 July 2026.
Mapmost is closed source and licensed by key, and the company does not publish a price list or an English language developer portal. Documentation and release notes are Chinese only, which is the practical barrier for a team outside China evaluating it against Cesium.
Frequently Asked Questions
Does Mapmost support Gaussian splatting?
Yes. Mapmost has shipped 3D Gaussian splat layers in its WebGL2 SDK since version 9.4.0 on 28 February 2025, and version 9.15.0 added loading of the SOG format in June 2026.
Is Mapmost open source?
Mapmost is not open source. It is a commercial SDK distributed under a licence key, and Mapmost does not publish list pricing.
What file formats does Mapmost read for Gaussian splats?
A single model layer reads splat, ply and sog files in EPSG:3857. The streamed service uses a proprietary mmgs.json tileset produced by Mapmost 3DGS Builder, and version 9.15.0 added SOG loading alongside it.
Can Mapmost select individual buildings inside a Gaussian splat scene?
Yes. Mapmost 9.14.1-beta added per building segmentation through a ClassifyAnalysis interface, and picking, measurement and frustum culling arrived earlier in version 9.5.0.
