diff --git a/.cruft.json b/.cruft.json
new file mode 100644
index 0000000..e35c008
--- /dev/null
+++ b/.cruft.json
@@ -0,0 +1,18 @@
+{
+  "template": "https://github.com/ecmwf-projects/cookiecutter-conda-package",
+  "commit": "d379e35af1aa17d816367bcb0942fcf3e238be9d",
+  "checkout": null,
+  "context": {
+    "cookiecutter": {
+      "project_name": "sarsen",
+      "project_slug": "sarsen",
+      "project_short_description": "Sarsen",
+      "copyright_holder": "B-Open Solutions srl",
+      "copyright_year": "2016",
+      "mypy_strict": true,
+      "integration_tests": true,
+      "_template": "https://github.com/ecmwf-projects/cookiecutter-conda-package"
+    }
+  },
+  "directory": null
+}
diff --git a/.github/workflows/on-push.yml b/.github/workflows/on-push.yml
index 1d2bc59..dc6c9c7 100644
--- a/.github/workflows/on-push.yml
+++ b/.github/workflows/on-push.yml
@@ -14,65 +14,95 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+defaults:
+  run:
+    shell: bash -l {0}
+
 jobs:
   pre-commit:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - uses: actions/setup-python@v4
+    - uses: actions/setup-python@v5
       with:
         python-version: 3.x
     - uses: pre-commit/action@v3.0.0
 
+  combine-environments:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v5
+      with:
+        python-version: 3.x
+    - name: Install conda-merge
+      run: |
+        python -m pip install conda-merge
+    - name: Combine environments
+      run: |
+        for SUFFIX in ci integration; do
+        conda-merge ci/environment-$SUFFIX.yml environment.yml > ci/combined-environment-$SUFFIX.yml || exit
+        done
+    - uses: actions/upload-artifact@v4
+      with:
+        name: combined-environments
+        path: ci/combined-environment-*.yml
+
   unit-tests:
-    name: unit-tests (3.11)
+    name: unit-tests
+    needs: combine-environments
     runs-on: ubuntu-latest
-    defaults:
-      run:
-        shell: bash -l {0}
+    strategy:
+      matrix:
+        python-version: ['3.11']
 
     steps:
     - uses: actions/checkout@v4
-    - name: Install Conda environment with Micromamba
-      uses: mamba-org/provision-with-micromamba@v16
+    - uses: actions/download-artifact@v4
+      with:
+        name: combined-environments
+        path: ci
+    - name: Get current date
+      id: date
+      run: echo "date=$(date +%Y-%m-%d)" >> "${GITHUB_OUTPUT}"
+    - uses: mamba-org/setup-micromamba@v1
       with:
-        environment-file: environment.yml
+        environment-file: ci/combined-environment-ci.yml
         environment-name: DEVELOP
-        channels: conda-forge
-        cache-env: true
-        cache-env-key: ubuntu-latest-3.11
-        extra-specs: |
-          python=3.11
+        cache-environment: true
+        cache-environment-key: environment-${{ steps.date.outputs.date }}
+        cache-downloads-key: downloads-${{ steps.date.outputs.date }}
+        create-args: >-
+          python=${{ matrix.python-version }}
     - name: Install package
       run: |
         python -m pip install --no-deps -e .
     - name: Run tests
       run: |
-        make test COV_REPORT=xml
-    - name: Run doc tests
-      run: |
-        make doc-test COV_REPORT=xml
-    - name: Upload code coverage to Codecov
-      uses: codecov/codecov-action@v3.1.4
+        make unit-tests COV_REPORT=xml
 
   type-check:
-    needs: [unit-tests]
+    needs: [combine-environments, unit-tests]
     runs-on: ubuntu-latest
-    defaults:
-      run:
-        shell: bash -l {0}
 
     steps:
     - uses: actions/checkout@v4
-    - name: Install Conda environment with Micromamba
-      uses: mamba-org/provision-with-micromamba@v16
+    - uses: actions/download-artifact@v4
       with:
-        environment-file: environment.yml
+        name: combined-environments
+        path: ci
+    - name: Get current date
+      id: date
+      run: echo "date=$(date +%Y-%m-%d)" >> "${GITHUB_OUTPUT}"
+    - uses: mamba-org/setup-micromamba@v1
+      with:
+        environment-file: ci/combined-environment-ci.yml
         environment-name: DEVELOP
-        channels: conda-forge
-        cache-env: true
-        cache-env-key: ubuntu-latest-3.11
-        extra-specs: |
+        cache-environment: true
+        cache-environment-key: environment-${{ steps.date.outputs.date }}
+        cache-downloads-key: downloads-${{ steps.date.outputs.date }}
+        create-args: >-
           python=3.11
     - name: Install package
       run: |
@@ -81,56 +111,125 @@ jobs:
       run: |
         make type-check
 
+  docs-build:
+    needs: [combine-environments, unit-tests]
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - uses: actions/download-artifact@v4
+      with:
+        name: combined-environments
+        path: ci
+    - name: Get current date
+      id: date
+      run: echo "date=$(date +%Y-%m-%d)" >> "${GITHUB_OUTPUT}"
+    - uses: mamba-org/setup-micromamba@v1
+      with:
+        environment-file: ci/combined-environment-ci.yml
+        environment-name: DEVELOP
+        cache-environment: true
+        cache-environment-key: environment-${{ steps.date.outputs.date }}
+        cache-downloads-key: downloads-${{ steps.date.outputs.date }}
+        create-args: >-
+          python=3.11
+    - name: Install package
+      run: |
+        python -m pip install --no-deps -e .
+    - name: Build documentation
+      run: |
+        make docs-build
+
   integration-tests:
-    needs: [unit-tests]
+    needs: [combine-environments, unit-tests]
+    if: |
+      success() && true
     runs-on: ubuntu-latest
-    defaults:
-      run:
-        shell: bash -l {0}
 
     strategy:
       matrix:
-        python-version: ['3.10', '3.9']
-        extra: ['']
         include:
         - python-version: '3.9'
-          extra: -minver
-        - python-version: '3.11'
-          extra: -mindep
+          extra: -integration
+
     steps:
     - uses: actions/checkout@v4
-    - name: Install Conda environment with Micromamba
-      uses: mamba-org/provision-with-micromamba@v16
+    - uses: actions/download-artifact@v4
+      with:
+        name: combined-environments
+        path: ci
+    - name: Get current date
+      id: date
+      run: echo "date=$(date +%Y-%m-%d)" >> "${GITHUB_OUTPUT}"
+    - uses: mamba-org/setup-micromamba@v1
       with:
-        environment-file: environment${{ matrix.extra }}.yml
+        environment-file: ci/combined-environment${{ matrix.extra }}.yml
         environment-name: DEVELOP${{ matrix.extra }}
-        channels: conda-forge
-        cache-env: true
-        cache-env-key: ubuntu-latest-${{ matrix.python-version }}${{ matrix.extra }}.
-        extra-specs: |
+        cache-environment: true
+        cache-environment-key: environment-${{ steps.date.outputs.date }}
+        cache-downloads-key: downloads-${{ steps.date.outputs.date }}
+        create-args: >-
           python=${{ matrix.python-version }}
     - name: Install package
       run: |
         python -m pip install --no-deps -e .
     - name: Run tests
       run: |
-        make test COV_REPORT=xml
-    - name: Upload code coverage to Codecov
-      uses: codecov/codecov-action@v3.1.4
+        make unit-tests COV_REPORT=xml
 
   distribution:
     runs-on: ubuntu-latest
-    needs: [integration-tests, type-check]
+    needs: [unit-tests, type-check, docs-build, integration-tests]
+    if: |
+      always() &&
+      needs.unit-tests.result == 'success' &&
+      needs.type-check.result == 'success' &&
+      needs.docs-build.result == 'success' &&
+      (needs.integration-tests.result == 'success' || needs.integration-tests.result == 'skipped')
 
     steps:
     - uses: actions/checkout@v4
-    - name: Build distributions
+    - uses: actions/setup-python@v5
+      with:
+        python-version: '3.11'
+    - name: Install package
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install build twine
+    - name: Build distribution
       run: |
-        $CONDA/bin/python -m pip install build
-        $CONDA/bin/python -m build
-    - name: Publish a Python distribution to PyPI
-      if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
-      uses: pypa/gh-action-pypi-publish@release/v1
+        python -m build
+    - name: Check wheels
+      run: |
+        cd dist || exit
+        python -m pip install sarsen*.whl || exit
+        python -m twine check --strict * || exit
+        python -c "import sarsen" || exit
+        cd ..
+    - uses: actions/upload-artifact@v4
+      with:
+        name: distribution
+        path: dist
+
+  upload-to-pypi:
+    runs-on: ubuntu-latest
+    needs: distribution
+    if: |
+      always() &&
+      needs.distribution.result == 'success' &&
+      github.event_name == 'push' &&
+      startsWith(github.ref, 'refs/tags')
+    environment:
+      name: pypi
+      url: https://pypi.org/p/sarsen
+    permissions:
+      id-token: write  # IMPORTANT: this permission is mandatory for trusted publish
+
+    steps:
+    - uses: actions/download-artifact@v4
+      with:
+        name: distribution
+        path: dist
+    - uses: pypa/gh-action-pypi-publish@v1.8.11
       with:
-        user: __token__
-        password: ${{ secrets.PYPI_API_TOKEN }}
+        verbose: true
diff --git a/.gitignore b/.gitignore
index 48c5beb..cfaf797 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,8 +1,243 @@
 # project specific
 *.tif
+
+# setuptools-scm
 version.py
-notebooks/GRD
 
+# Sphinx automatic generation of API
+docs/_api/
+
+# Combined environments
+ci/combined-environment-*.yml
+
+# Created by https://www.toptal.com/developers/gitignore/api/python,jupyternotebooks,vim,visualstudiocode,pycharm,emacs,linux,macos,windows
+# Edit at https://www.toptal.com/developers/gitignore?templates=python,jupyternotebooks,vim,visualstudiocode,pycharm,emacs,linux,macos,windows
+
+### Emacs ###
+# -*- mode: gitignore; -*-
+*~
+\#*\#
+/.emacs.desktop
+/.emacs.desktop.lock
+*.elc
+auto-save-list
+tramp
+.\#*
+
+# Org-mode
+.org-id-locations
+*_archive
+
+# flymake-mode
+*_flymake.*
+
+# eshell files
+/eshell/history
+/eshell/lastdir
+
+# elpa packages
+/elpa/
+
+# reftex files
+*.rel
+
+# AUCTeX auto folder
+/auto/
+
+# cask packages
+.cask/
+dist/
+
+# Flycheck
+flycheck_*.el
+
+# server auth directory
+/server/
+
+# projectiles files
+.projectile
+
+# directory configuration
+.dir-locals.el
+
+# network security
+/network-security.data
+
+
+### JupyterNotebooks ###
+# gitignore template for Jupyter Notebooks
+# website: http://jupyter.org/
+
+.ipynb_checkpoints
+*/.ipynb_checkpoints/*
+
+# IPython
+profile_default/
+ipython_config.py
+
+# Remove previous ipynb_checkpoints
+#   git rm -r .ipynb_checkpoints/
+
+### Linux ###
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+### macOS ###
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+### macOS Patch ###
+# iCloud generated files
+*.icloud
+
+### PyCharm ###
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# AWS User-specific
+.idea/**/aws.xml
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# SonarLint plugin
+.idea/sonarlint/
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+### PyCharm Patch ###
+# Comment Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-215987721
+
+# *.iml
+# modules.xml
+# .idea/misc.xml
+# *.ipr
+
+# Sonarlint plugin
+# https://plugins.jetbrains.com/plugin/7973-sonarlint
+.idea/**/sonarlint/
+
+# SonarQube Plugin
+# https://plugins.jetbrains.com/plugin/7238-sonarqube-community-plugin
+.idea/**/sonarIssues.xml
+
+# Markdown Navigator plugin
+# https://plugins.jetbrains.com/plugin/7896-markdown-navigator-enhanced
+.idea/**/markdown-navigator.xml
+.idea/**/markdown-navigator-enh.xml
+.idea/**/markdown-navigator/
+
+# Cache file creation bug
+# See https://youtrack.jetbrains.com/issue/JBR-2257
+.idea/$CACHE_FILE$
+
+# CodeStream plugin
+# https://plugins.jetbrains.com/plugin/12206-codestream
+.idea/codestream.xml
+
+# Azure Toolkit for IntelliJ plugin
+# https://plugins.jetbrains.com/plugin/8053-azure-toolkit-for-intellij
+.idea/**/azureSettings.xml
+
+### Python ###
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]
@@ -15,7 +250,6 @@ __pycache__/
 .Python
 build/
 develop-eggs/
-dist/
 downloads/
 eggs/
 .eggs/
@@ -25,7 +259,6 @@ parts/
 sdist/
 var/
 wheels/
-pip-wheel-metadata/
 share/python-wheels/
 *.egg-info/
 .installed.cfg
@@ -55,6 +288,7 @@ coverage.xml
 *.py,cover
 .hypothesis/
 .pytest_cache/
+cover/
 
 # Translations
 *.mo
@@ -77,17 +311,17 @@ instance/
 docs/_build/
 
 # PyBuilder
+.pybuilder/
 target/
 
 # Jupyter Notebook
-.ipynb_checkpoints
 
 # IPython
-profile_default/
-ipython_config.py
 
 # pyenv
-.python-version
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
 
 # pipenv
 #   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
@@ -96,7 +330,22 @@ ipython_config.py
 #   install all needed dependencies.
 #Pipfile.lock
 
-# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
 __pypackages__/
 
 # Celery stuff
@@ -133,8 +382,93 @@ dmypy.json
 # Pyre type checker
 .pyre/
 
-# others
-dask-worker-space
-.DS_Store
-.vscode
-.gitignore
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+### Python Patch ###
+# Poetry local configuration file - https://python-poetry.org/docs/configuration/#local-configuration
+poetry.toml
+
+# ruff
+.ruff_cache/
+
+# LSP config files
+pyrightconfig.json
+
+### Vim ###
+# Swap
+[._]*.s[a-v][a-z]
+!*.svg  # comment out if you don't need vector files
+[._]*.sw[a-p]
+[._]s[a-rt-v][a-z]
+[._]ss[a-gi-z]
+[._]sw[a-p]
+
+# Session
+Session.vim
+Sessionx.vim
+
+# Temporary
+.netrwhist
+# Auto-generated tag files
+tags
+# Persistent undo
+[._]*.un~
+
+### VisualStudioCode ###
+.vscode/
+# .vscode/*
+# !.vscode/settings.json
+# !.vscode/tasks.json
+# !.vscode/launch.json
+# !.vscode/extensions.json
+# !.vscode/*.code-snippets
+
+# Local History for Visual Studio Code
+.history/
+
+# Built Visual Studio Code Extensions
+*.vsix
+
+### VisualStudioCode Patch ###
+# Ignore all local history of files
+.history
+.ionide
+
+### Windows ###
+# Windows thumbnail cache files
+Thumbs.db
+Thumbs.db:encryptable
+ehthumbs.db
+ehthumbs_vista.db
+
+# Dump file
+*.stackdump
+
+# Folder config file
+[Dd]esktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msix
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+
+# End of https://www.toptal.com/developers/gitignore/api/python,jupyternotebooks,vim,visualstudiocode,pycharm,emacs,linux,macos,windows
diff --git a/.pre-commit-config-cruft.yaml b/.pre-commit-config-cruft.yaml
new file mode 100644
index 0000000..b55f24f
--- /dev/null
+++ b/.pre-commit-config-cruft.yaml
@@ -0,0 +1,7 @@
+repos:
+- repo: https://github.com/cruft/cruft
+  rev: 2.15.0
+  hooks:
+  - id: cruft
+    entry: cruft update -y
+    additional_dependencies: [toml]
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 62fca7c..7d86a38 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
 - repo: https://github.com/pre-commit/pre-commit-hooks
-  rev: v4.4.0
+  rev: v4.5.0
   hooks:
   - id: trailing-whitespace
   - id: end-of-file-fixer
@@ -8,34 +8,32 @@ repos:
   - id: check-yaml
   - id: check-toml
   - id: check-added-large-files
+  - id: check-merge-conflict
   - id: debug-statements
   - id: mixed-line-ending
-- repo: https://github.com/PyCQA/isort
-  rev: 5.12.0
-  hooks:
-  - id: isort
-- repo: https://github.com/psf/black
-  rev: 23.9.1
-  hooks:
-  - id: black
 - repo: https://github.com/keewis/blackdoc
-  rev: v0.3.8
+  rev: v0.3.9
   hooks:
   - id: blackdoc
-    exclude: generate_reductions.py
-    additional_dependencies: [black==22.3.0]
-- repo: https://github.com/PyCQA/flake8
-  rev: 6.1.0
+    additional_dependencies: [black==23.11.0]
+- repo: https://github.com/astral-sh/ruff-pre-commit
+  rev: v0.1.13
   hooks:
-  - id: flake8
+  - id: ruff
+    args: [--fix, --show-fixes]
+  - id: ruff-format
 - repo: https://github.com/executablebooks/mdformat
   rev: 0.7.17
   hooks:
   - id: mdformat
 - repo: https://github.com/macisamuele/language-formatters-pre-commit-hooks
-  rev: v2.10.0
+  rev: v2.12.0
   hooks:
   - id: pretty-format-yaml
-    args: [--autofix]
+    args: [--autofix, --preserve-quotes]
   - id: pretty-format-toml
     args: [--autofix]
+- repo: https://github.com/gitleaks/gitleaks
+  rev: v8.18.1
+  hooks:
+  - id: gitleaks
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..85b2d46
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,12 @@
+FROM continuumio/miniconda3
+
+WORKDIR /src/sarsen
+
+COPY environment.yml /src/sarsen/
+
+RUN conda install -c conda-forge gcc python=3.11 \
+    && conda env update -n base -f environment.yml
+
+COPY . /src/sarsen
+
+RUN pip install --no-deps -e .
diff --git a/Makefile b/Makefile
index 9ffc0cb..1fa1138 100644
--- a/Makefile
+++ b/Makefile
@@ -3,22 +3,36 @@ CONDA := conda
 CONDAFLAGS :=
 COV_REPORT := html
 
-default: qa test type-check
+default: qa unit-tests type-check
 
 qa:
 	pre-commit run --all-files
 
-test:
-	python -m pytest -vv --cov=. --cov-report=$(COV_REPORT)
-
-doc-test:
-	python -m pytest -vv --doctest-glob='*.md' README.md
+unit-tests:
+	python -m pytest -vv --cov=. --cov-report=$(COV_REPORT) --doctest-glob="*.md" --doctest-glob="*.rst"
 
 type-check:
-	python -m mypy --strict .
+	python -m mypy .
 
 conda-env-update:
-	$(CONDA) env update $(CONDAFLAGS) -f environment.yml
+	$(CONDA) install -y -c conda-forge conda-merge
+	$(CONDA) run conda-merge environment.yml ci/environment-ci.yml > ci/combined-environment-ci.yml
+	$(CONDA) env update $(CONDAFLAGS) -f ci/combined-environment-ci.yml
+
+docker-build:
+	docker build -t $(PROJECT) .
+
+docker-run:
+	docker run --rm -ti -v $(PWD):/srv $(PROJECT)
+
+template-update:
+	pre-commit run --all-files cruft -c .pre-commit-config-cruft.yaml
 
-conda-env-update-all: conda-env-update
-	$(CONDA) env update $(CONDAFLAGS) -f environment-dev.yml
+docs-build:
+	cd docs && rm -fr _api && make clean && make html
+
+# DO NOT EDIT ABOVE THIS LINE, ADD COMMANDS BELOW
+
+
+doc-test:
+	python -m pytest -vv --doctest-glob='*.md' README.md
diff --git a/ci/environment-ci.yml b/ci/environment-ci.yml
new file mode 100644
index 0000000..5d9e350
--- /dev/null
+++ b/ci/environment-ci.yml
@@ -0,0 +1,21 @@
+# environment-ci.yml: Additional dependencies to install in the CI environment.
+channels:
+- conda-forge
+- nodefaults
+dependencies:
+- make
+- mypy
+- myst-parser
+- pip
+- pre-commit
+- pydata-sphinx-theme
+- pytest
+- pytest-cov
+- sphinx
+- sphinx-autoapi
+# DO NOT EDIT ABOVE THIS LINE, ADD DEPENDENCIES BELOW
+- mdformat
+- pandas-stubs
+- types-setuptools
+- pip:
+  - mdformat-gfm
diff --git a/ci/environment-integration.yml b/ci/environment-integration.yml
new file mode 100644
index 0000000..82db3d6
--- /dev/null
+++ b/ci/environment-integration.yml
@@ -0,0 +1,19 @@
+# environment-integration.yml: Additional dependencies to install in the integration environment (e.g., pinned dependencies).
+channels:
+- conda-forge
+- nodefaults
+dependencies:
+- make
+- pytest
+- pytest-cov
+# DO NOT EDIT ABOVE THIS LINE, ADD DEPENDENCIES BELOW
+- dask == 2023.2.0
+- fsspec == 2023.1.0
+- numpy == 1.22.0
+- packaging == 21.3
+- pandas == 1.4.0
+- rasterio == 1.3.0
+- rioxarray == 0.13.0
+- xarray == 2023.02.0
+- xarray-sentinel == 0.9.3
+- xmlschema == 2.2.0
diff --git a/docs/Makefile b/docs/Makefile
new file mode 100644
index 0000000..d4bb2cb
--- /dev/null
+++ b/docs/Makefile
@@ -0,0 +1,20 @@
+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+SPHINXOPTS    ?=
+SPHINXBUILD   ?= sphinx-build
+SOURCEDIR     = .
+BUILDDIR      = _build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
diff --git a/docs/_static/.gitkeep b/docs/_static/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/docs/_templates/.gitkeep b/docs/_templates/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/docs/conf.py b/docs/conf.py
new file mode 100644
index 0000000..b84d65c
--- /dev/null
+++ b/docs/conf.py
@@ -0,0 +1,76 @@
+# Configuration file for the Sphinx documentation builder.
+#
+# This file only contains a selection of the most common options. For a full
+# list see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+
+# -- Import and path setup ---------------------------------------------------
+
+import os
+import sys
+
+import sarsen
+
+sys.path.insert(0, os.path.abspath("../"))
+
+# -- Project information -----------------------------------------------------
+
+project = "sarsen"
+copyright = "2016, B-Open Solutions srl"
+author = "B-Open Solutions srl"
+version = sarsen.__version__
+release = sarsen.__version__
+
+# -- General configuration ---------------------------------------------------
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    "autoapi.extension",
+    "myst_parser",
+    "sphinx.ext.autodoc",
+    "sphinx.ext.napoleon",
+]
+
+# autodoc configuration
+autodoc_typehints = "none"
+
+# autoapi configuration
+autoapi_dirs = ["../sarsen"]
+autoapi_ignore = ["*/version.py"]
+autoapi_options = [
+    "members",
+    "inherited-members",
+    "undoc-members",
+    "show-inheritance",
+    "show-module-summary",
+    "imported-members",
+]
+autoapi_root = "_api"
+
+# napoleon configuration
+napoleon_google_docstring = False
+napoleon_numpy_docstring = True
+napoleon_preprocess_types = True
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ["_templates"]
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This pattern also affects html_static_path and html_extra_path.
+exclude_patterns = ["_build", "Thumbs.db", ".DS_Store"]
+
+
+# -- Options for HTML output -------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+#
+html_theme = "pydata_sphinx_theme"
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ["_static"]
diff --git a/docs/index.md b/docs/index.md
new file mode 100644
index 0000000..7b55574
--- /dev/null
+++ b/docs/index.md
@@ -0,0 +1,16 @@
+# Welcome to sarsen's documentation!
+
+Sarsen.
+
+```{toctree}
+:caption: 'Contents:'
+:maxdepth: 2
+
+API Reference <_api/sarsen/index>
+```
+
+# Indices and tables
+
+- {ref}`genindex`
+- {ref}`modindex`
+- {ref}`search`
diff --git a/docs/make.bat b/docs/make.bat
new file mode 100644
index 0000000..954237b
--- /dev/null
+++ b/docs/make.bat
@@ -0,0 +1,35 @@
+@ECHO OFF
+
+pushd %~dp0
+
+REM Command file for Sphinx documentation
+
+if "%SPHINXBUILD%" == "" (
+	set SPHINXBUILD=sphinx-build
+)
+set SOURCEDIR=.
+set BUILDDIR=_build
+
+%SPHINXBUILD% >NUL 2>NUL
+if errorlevel 9009 (
+	echo.
+	echo.The 'sphinx-build' command was not found. Make sure you have Sphinx
+	echo.installed, then set the SPHINXBUILD environment variable to point
+	echo.to the full path of the 'sphinx-build' executable. Alternatively you
+	echo.may add the Sphinx directory to PATH.
+	echo.
+	echo.If you don't have Sphinx installed, grab it from
+	echo.https://www.sphinx-doc.org/
+	exit /b 1
+)
+
+if "%1" == "" goto help
+
+%SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+goto end
+
+:help
+%SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+
+:end
+popd
diff --git a/environment.yml b/environment.yml
index b45766a..8d6d7f9 100644
--- a/environment.yml
+++ b/environment.yml
@@ -1,5 +1,12 @@
+# environment.yml: Mandatory dependencies only.
 channels:
 - conda-forge
+- nodefaults
+# EXAMPLE:
+# dependencies:
+# - package1
+# - package2
+# DO NOT EDIT ABOVE THIS LINE, ADD DEPENDENCIES BELOW AS SHOWN IN THE EXAMPLE
 dependencies:
 - attrs
 - bottleneck
@@ -7,22 +14,11 @@ dependencies:
 - flox
 - fsspec
 - gdal
-- make
-- mdformat
-- mypy
-- numexpr
 - numpy >= 1.22.0
-- pandas-stubs
-- pip
-- pytest
-- pytest-cov
 - rasterio >= 1.3.0
 - rioxarray
 - scipy
 - typer
-- types-setuptools
 - xarray >= 2022.06.0
 - xarray-sentinel >= 0.9.3
 - xmlschema
-- pip:
-  - mdformat-gfm
diff --git a/pyproject.toml b/pyproject.toml
index c247891..7ea5dbc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,17 +1,39 @@
 [build-system]
-requires = [
-  "setuptools>=42",
-  "wheel",
-  "setuptools_scm[toml]>=3.4",
-  "setuptools_scm_git_archive"
+requires = ["setuptools>=45", "setuptools_scm[toml]>=6.2"]
+
+[project]
+classifiers = [
+  "Development Status :: 4 - Beta",
+  "Intended Audience :: Science/Research",
+  "License :: OSI Approved :: Apache Software License",
+  "Operating System :: OS Independent",
+  "Programming Language :: Python",
+  "Programming Language :: Python :: 3",
+  "Programming Language :: Python :: 3.9",
+  "Programming Language :: Python :: 3.10",
+  "Programming Language :: Python :: 3.11",
+  "Topic :: Scientific/Engineering"
+]
+dependencies = [
+  "attrs",
+  "flox",
+  "numpy",
+  "pandas",
+  "rasterio",
+  "rioxarray",
+  "typer",
+  "xarray >= 2022.06.0",
+  "xarray-sentinel >= 0.9.3"
 ]
+description = "Algorithms and utilities for Synthetic Aperture Radar (SAR) sensors"
+dynamic = ["version"]
+license = {file = "LICENSE"}
+name = "sarsen"
+readme = "README.md"
 
 [tool.coverage.run]
 branch = true
 
-[tool.isort]
-profile = "black"
-
 [tool.mypy]
 plugins = "numpy.typing.mypy_plugin"
 strict = true
@@ -20,9 +42,41 @@ strict = true
 ignore_missing_imports = true
 module = ["py", "rasterio"]
 
+[tool.ruff]
+ignore = [
+  # pydocstyle: Missing Docstrings
+  "D1"
+]
+# Same as Black.
+indent-width = 4
+line-length = 88
+select = [
+  # pyflakes
+  "F",
+  # pycodestyle
+  "E",
+  "W",
+  # isort
+  "I",
+  # pydocstyle
+  "D"
+]
+
+[tool.ruff.lint.pycodestyle]
+max-line-length = 110
+
+[tool.ruff.pydocstyle]
+convention = "numpy"
+
+[tool.setuptools]
+packages = ["sarsen"]
+
+[tool.setuptools.package-data]
+sarsen = ["py.typed"]
+
 [tool.setuptools_scm]
 write_to = "sarsen/version.py"
 write_to_template = '''
-# don't change, don't track in version control
+# Do not change! Do not track in version control!
 __version__ = "{version}"
 '''
diff --git a/sarsen/__init__.py b/sarsen/__init__.py
index 9b99d2b..d589065 100644
--- a/sarsen/__init__.py
+++ b/sarsen/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2016-2022 B-Open Solutions srl
+# Copyright 2016, B-Open Solutions srl.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/sarsen/apps.py b/sarsen/apps.py
index e2c7129..16d6b6e 100644
--- a/sarsen/apps.py
+++ b/sarsen/apps.py
@@ -20,7 +20,6 @@ def simulate_acquisition(
     include_variables: Container[str] = (),
 ) -> xr.Dataset:
     """Compute the image coordinates of the DEM given the satellite orbit."""
-
     orbit_interpolator = orbit.OrbitPolyfitIterpolator.from_position(position_ecef)
     position_ecef = orbit_interpolator.position()
     velocity_ecef = orbit_interpolator.velocity()
@@ -40,12 +39,12 @@ def simulate_acquisition(
 
     for data_var_name in acquisition.data_vars:
         if include_variables and data_var_name not in include_variables:
-            acquisition = acquisition.drop_vars(data_var_name)
+            acquisition = acquisition.drop_vars(data_var_name)  # type: ignore
 
     # drop coordinates that are not associated with any data variable
     for coord_name in acquisition.coords:
         if all(coord_name not in dv.coords for dv in acquisition.data_vars.values()):
-            acquisition = acquisition.drop_vars(coord_name)
+            acquisition = acquisition.drop_vars(coord_name)  # type: ignore
 
     return acquisition
 
diff --git a/sarsen/geocoding.py b/sarsen/geocoding.py
index bce1cb4..4ee5469 100644
--- a/sarsen/geocoding.py
+++ b/sarsen/geocoding.py
@@ -90,7 +90,10 @@ def backward_geocode(
 
     # NOTE: dem_distance has the associated azimuth_time as a coordinate already
     _, _, _, (dem_distance, satellite_direction) = secant_method(
-        zero_doppler, t_prev, t_curr, diff_ufunc  # type: ignore
+        zero_doppler,
+        t_prev,
+        t_curr,
+        diff_ufunc,
     )
     acquisition = xr.Dataset(
         data_vars={
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index 310cc72..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,44 +0,0 @@
-[metadata]
-name = sarsen
-author = B-Open
-author_email = software@bopen.eu
-license = Apache License 2.0
-description = Algorithms and utilities for Synthetic Aperture Radar (SAR) sensors
-url = https://github.com/bopen/sarsen
-classifiers =
-    Development Status :: 4 - Beta
-    Intended Audience :: Science/Research
-    License :: OSI Approved :: Apache Software License
-    Operating System :: OS Independent
-    Programming Language :: Python
-    Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.9
-    Programming Language :: Python :: 3.10
-    Programming Language :: Python :: 3.11
-    Topic :: Scientific/Engineering
-long_description_content_type=text/markdown
-long_description = file: README.md
-keywords = algorithms, copernicus, earth-observation, remote-sensing, sentinel-1, sar, synthetic-aperture-radar, xarray
-
-[options]
-packages = find:
-python_requires = >=3.9
-install_requires =
-    attrs
-    flox
-    numpy
-    pandas
-    rasterio
-    rioxarray
-    typer
-    xarray >= 2022.06.0
-    xarray-sentinel >= 0.9.3
-include_package_data = True
-
-[options.entry_points]
-console_scripts =
-    sarsen = sarsen.__main__:app
-
-[flake8]
-max-line-length = 120
-extend-ignore = E203, W503
diff --git a/tests/test_00_version.py b/tests/test_00_version.py
new file mode 100644
index 0000000..8528f89
--- /dev/null
+++ b/tests/test_00_version.py
@@ -0,0 +1,5 @@
+import sarsen
+
+
+def test_version() -> None:
+    assert sarsen.__version__ != "999"
diff --git a/tests/test_10_chunking.py b/tests/test_10_chunking.py
index d7a60f4..2ffa25d 100644
--- a/tests/test_10_chunking.py
+++ b/tests/test_10_chunking.py
@@ -1,5 +1,3 @@
-from typing import Callable
-
 import numpy as np
 import xarray as xr
 
@@ -62,6 +60,9 @@ def test_compute_chunks() -> None:
 
 def test_map_ovelap() -> None:
     arr = xr.DataArray(np.arange(22 * 31).reshape((22, 31)), dims=("x", "y"))
-    function: Callable[[xr.DataArray], xr.DataArray] = lambda x: x
+
+    def function(x: xr.DataArray) -> xr.DataArray:
+        return x
+
     res = chunking.map_ovelap(function=function, obj=arr, chunks=10, bound=2)
     assert res.equals(arr)