titiler.xarray

titiler.xarray

Adds support for Xarray Dataset (NetCDF/Zarr) in Titiler.

Installation

python -m pip install -U pip

# From Pypi
python -m pip install "titiler.xarray[full]"

# Or from sources
git clone https://github.com/developmentseed/titiler.git
cd titiler && python -m pip install -e src/titiler/core -e "src/titiler/xarray"

Installation options

Default installation for titiler.xarray DOES NOT include fsspec or any storage's specific dependencies (e.g s3fs) nor engine dependencies (zarr, h5netcdf). This is to ease the customization and deployment of user's applications. If you want to use the default's dataset reader you will need to at least use the [minimal] dependencies (e.g python -m pip install "titiler.xarray[minimal]").

Here is the list of available options:

• fs: h5netcdf, fsspec, s3fs, aiohttp, gcsfs

Dependencies

Titiler.xarray follows SPEC 0, similar to xarray.

How To

from fastapi import FastAPI

from titiler.xarray.extensions import VariablesExtension
from titiler.xarray.factory import TilerFactory

app = FastAPI(
    openapi_url="/api",
    docs_url="/api.html",
    description="""Xarray based tiles server for MultiDimensional dataset (Zarr/NetCDF).

---

**Documentation**: <a href="https://developmentseed.org/titiler/" target="_blank">https://developmentseed.org/titiler/</a>

**Source Code**: <a href="https://github.com/developmentseed/titiler" target="_blank">https://github.com/developmentseed/titiler</a>

---
    """,
)

md = TilerFactory(
    router_prefix="/md",
    extensions=[
        VariablesExtension(),
    ],
)
app.include_router(md.router, prefix="/md", tags=["Multi Dimensional"])

Package structure

titiler/
 └── xarray/
    ├── tests/                   - Tests suite
    └── titiler/xarray/          - `xarray` namespace package
        ├── dependencies.py      - titiler-xarray dependencies
        ├── extensions.py        - titiler-xarray extensions
        ├── main.py              - main fastapi application
        ├── io.py                - titiler-xarray Readers
        └── factory.py           - endpoints factory

Custom Dataset Opener

A default Dataset IO is provided within titiler.xarray.io.Reader class with only support for Zarr dataset (via xarray+zarr-python).

For other dataset (e.g NetCDF), you can use titiler.xarray.io.FsReader which use the optional dependencies (fsspec, netcdf5).

python -m pip install "titiler.xarray[fs]"

Example of application with fsspec reader:

from fastapi import FastAPI
from titiler.xarray.extensions import VariablesExtension
from titiler.xarray.factory import TilerFactory
from titiler.xarray.io import FsReader

# Create FastAPI application
app = FastAPI(openapi_url="/api", docs_url="/api.html")

# Create custom endpoints with the FsReader
md = TilerFactory(
    reader=FsReader,
    router_prefix="/md",
    extensions=[
        # we also want to use the simple opener for the Extension
        VariablesExtension(dataset_opener=xarray.open_dataset),
    ],
)

app.include_router(md.router, prefix="/md", tags=["Multi Dimensional"])