PMTiles: An open, cloud-optimized archive format for serverless map data
2021-09-29, 15:30–16:00, Puerto Madryn

Have you ever wished for web maps with no servers or backend to maintain? Introducing a new archive format called PMTiles, based on HTTP Range requests, for serving Z/X/Y tiles from storage APIs such as S3.

PMTiles is a new archive format for pyramids of tiled data. It enables developers to host tiled geodata on commodity storage platforms such as S3, and can contain raster images, vector geometry, or data in any other format. This talk will:

  • Introduce the design and specification of PMTiles, with comparison to Cloud Optimized GeoTIFFs
  • Demo some open source tools to convert between PMTiles and other formats such as directories or MBTiles
  • Explain the use cases for which PMTiles fits well, and how it interacts with map rendering libraries, web servers, compression and content delivery networks

Authors and Affiliations

Liu, Brandon (1)

(1) Protomaps LLC

Requirements for the Attendees

Some background in web mapping such as with Leaflet




Standards, interoperability, SDIs


1 - Principiants. No required specific knowledge is needed.

Language of the Presentation


Cartographic technologist in Taipei, Taiwan, building Protomaps, a universal mapping system based on OpenStreetMap.