developmentseed/titiler

A Happy Tiles factory.

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Documentation: https://devseed.com/titiler/

Source Code: https://github.com/developmentseed/titiler

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TiTiler, pronounced tee-tiler (ti is the diminutive version of the french petit which means small), is a set of python modules that focus on creating FastAPI application for dynamic tiling.

Note: This project is the descendant of cogeo-tiler and cogeo-mosaic-tiler.

Features

• Built on top of FastAPI
• Cloud Optimized GeoTIFF support
• SpatioTemporal Asset Catalog support
• Multiple projections support (see TileMatrixSets) via morecantile.
• Multi-Dimensional (Zarr) dataset support via Xarray
• JPEG / JP2 / PNG / WEBP / GTIFF / NumpyTile output format support
• OGC RESTful WMTS / OGC Tiles API support
• Partial support of OGC Maps API
• Automatic OpenAPI documentation (FastAPI builtin)
• Virtual mosaic support (via MosaicJSON)
• Example of AWS Lambda / ECS deployment (via CDK) / K8s Helm chart

Packages

Starting with version 0.3.0, the TiTiler python module has been split into a set of python namespace packages: titiler.{package}.

Package	Version	Description
titiler.core		The Core package contains libraries to help create a dynamic tiler for COG and STAC
titiler.xarray		The xarray package contains libraries to help create a dynamic tiler for Zarr/NetCDF datasets
titiler.extensions		TiTiler's extensions package. Contains extensions for Tiler Factories.
titiler.mosaic		The mosaic package contains libraries to help create a dynamic tiler for MosaicJSON (adds cogeo-mosaic requirement)
titiler.application		TiTiler's demo package. Contains a FastAPI application with full support of COG, Zarr, STAC and MosaicJSON

Installation

[!WARNING]

Do not install the package named titiler from PyPI. In late 2025, we dropped support for this metapackage; now you must install TiTiler from the package names shown below.

To install from PyPI and run:

# Make sure you have pip up to date
python -m pip install -U pip

python -m pip  install titiler.{package}
# e.g.,
# python -m pip  install titiler.core
# python -m pip  install titiler.xarray
# python -m pip  install titiler.extensions
# python -m pip  install titiler.mosaic
# python -m pip  install titiler.application (also installs core, extensions, xarray and mosaic)

# Install uvicorn to run the FastAPI application locally
python -m pip install uvicorn

# Launch application locally
uvicorn titiler.application.main:app

To install from sources and run for development:

git clone https://github.com/developmentseed/titiler.git
cd titiler

uv sync --group server
uv run uvicorn titiler.application.main:app --reload

Docker

Ready to use/deploy images can be found on Github registry.

• https://github.com/developmentseed/titiler/pkgs/container/titiler

docker run \
    --platform=linux/amd64 \
    -p 8000:8000 \
    --rm -it ghcr.io/developmentseed/titiler:latest \
    uvicorn titiler.application.main:app --host 0.0.0.0 --port 8000 --workers 1

• Built the docker locally

git clone https://github.com/developmentseed/titiler.git
cd titiler

docker compose up --build titiler

Runtime user

The image runs as the non-root user nonroot (uid/gid 65532). Releases up to 2.2.1 ran as root.

With rootless Podman, nonroot maps to a subordinate host uid, so it can't read bind-mounted files that only your account or its groups can access. Run as container root, which maps to your own uid, or map your uid onto nonroot (Podman >= 4.3):

podman run --user 0:0 --group-add keep-groups ...
podman run --userns=keep-id:uid=65532,gid=65532 --group-add keep-groups ...

Project structure

src/titiler/                     - titiler modules.
 ├── application/                - Titiler's `Application` package
 ├── extensions/                 - Titiler's `Extensions` package
 ├── xarray/                     - Titiler's `Xarray` package
 ├── core/                       - Titiler's `Core` package
 └── mosaic/                     - Titiler's `Mosaic` package

Contribution & Development

See CONTRIBUTING.md

License

See LICENSE

Authors

Created by Development Seed

See contributors for a listing of individual contributors.

Changes

See CHANGES.md.