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Tools to generate tiles from WMS or Mapnik, to S3, Berkley DB, MBTiles, or local filesystem in WMTS layout using Amazon cloud services.

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camptocamp/tilecloud-chain

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TileCloud Chain

The goal of TileCloud Chain is to provide tools around tile generation on a chain like:

Source: WMS, Mapnik.

Optionally using an SQS queue, AWS host, SNS topic.

Destination in WMTS layout, on S3, on Berkeley DB (bsddb), on MBTiles, or on local filesystem.

Features:

  • Generate tiles.
  • Drop empty tiles.
  • Drop tiles outside a geometry or a bbox.
  • Use MetaTiles.
  • Generate the legend images.
  • Generate GetCapabilities.
  • Generate OpenLayers example page.
  • Obtain the hash of an empty tile.
  • In the future, measure tile generation speed.
  • Calculate cost and generation time.
  • In the future, manage the AWS hosts that generate tiles.
  • Delete empty tiles.
  • Copy files between caches.
  • Be able to use an SQS queue to dispatch the generation.
  • Post processing the generated tiles.
  • ...

Legacy features:

  • bsddb support
  • sqlite (mbtiles) support
  • mapnik support (should be updated for Python3)

Screenshot

Screenshot of the admin page with queue stored on PostgreSQL:

TileCloud Chain

Get it

Create the config file tilegeneration/config.yaml see as example.

Support

Only the latest release is supported and version < 1.11 contains security issues.

From sources

Build it:

git submodule update --recursive
python3 -m venv .build/venv
.build/venv/bin/pip install -r requirements.txt
.build/venv/bin/pip install -e .
.build/venv/bin/pip install -r dev-requirements.txt

Run prospector

.build/venv/bin/prospector

Run the tests

Setup your environment:

touch tilecloud_chain/OpenLayers.js
docker build --tag camptocamp/tilecloud-chain .
docker compose -p tilecloud up

To run the tests:

docker compose -p tilecloud exec test python setup.py nosetests --logging-filter=tilecloud,tilecloud_chain --attr '!'nopy3

Documentation

As documentation you can read the USAGE.rst and the configuration reference.

VSCode

You can add that in your workspace configuration to use the JSON schema:

{
  "yaml.schemas": {
    "../tilecloud-chain/tilecloud_chain/schema.json": [
      "tilecloud-chain/tilecloud_chain/tests/tilegeneration/*.yaml"
    ]
  }
}

Contributing

Install the pre-commit hooks:

pip install pre-commit
pre-commit install --allow-missing-config