Windshaft 
A Node.js map tile library for PostGIS and torque.js, with CartoCSS styling.
- Can render arbitrary SQL queries
- Generates image and UTFGrid interactivity tiles
- Accepts, stores, serves, and applies map styles written in
CartoCSS - Supports re-projections
Windshaft is a library used by CARTO, a location intelligence and data visualization tool.
Examples
Build
Requirements:
Node 10.x (npm 6.x)PostgreSQL >= 10.0PostGIS >= 2.4CARTO Postgres Extension >= 0.24.1Redis >= 4libcairo2-dev,libpango1.0-dev,libjpeg8-devandlibgif-devfor server side canvas supportC++11to build internal dependencies. When there's no pre-built binaries for your OS/architecture distribution.
Install
To fetch and build all node-based dependencies, run:
$ npm install
Installing Mapnik
Note: only needed while developing Mapnik and/or node-mapnik.
node-mapnik comes compiled for some platforms and architectures, in case you need it you can always compile, package and install it manually. The recommended option is via binaries, see mason and install Mapnik like:
$ mason install mapnik <version>
Where <version> is the latest released version of Mapnik. You can also use other alternatives:
Usage
Probably one of the more advanced uses of Windshaft library can be found at Windshaft-cartodb project.
Test
$ npm test
Coverage
$ npm run cover
Open ./coverage/lcov-report/index.html.
Docker support
We provide docker images just for testing and continuous integration purposes:
You can find instructions to install Docker, download, and update images here.
Useful npm scripts
Run test in a docker image with a specific Node.js version:
$ DOCKER_IMAGE=<docker-image-tag> NODE_VERSION=<nodejs-version> npm run test:docker
Where:
<docker-image-tag>: the tag of required docker image, e.g.carto/nodejs-xenial-pg1121:latest<nodejs-version>: the Node.js version, e.g.10.15.1
In case you need to debug:
$ DOCKER_IMAGE=<docker-image-tag> npm run docker:bash
Troubleshooting
Fonts: Invalid value for text-face-name
You need to install fonts at system level to be able to use them. If you face an issue like Invalid value for text-face-name, the type font is expected. DejaVu Sans Book (of type string) was given. probably you don't have the required fonts, try to install DejaVu fonts or any other font needed.
Contributing
- The issue tracker:
Github. - We love Pull Requests from everyone, see contributing to Open Source on GitHub.
- You'll need to sign a Contributor License Agreement (CLA) before submitting a Pull Request. Learn more here.
Versioning
We follow SemVer for versioning. For available versions, see the tags on this repository.
License
This project is licensed under the BSD 3-clause "New" or "Revised" License. See the LICENSE file for details.