steinmetz

Steinmetz (german for stonemason) is a tile generator for mapping applications.

This repository contains the core code that powers derived applications (you can find the completed and planned applications in the README file below.)

Find a full example here to run yourself.

Installation & Use

For programmatic usage (use in your Node.js application) install via NPM. Click here to find the package's page.

npm install --save steinmetz

Objectives

• Prioritize objectives. (90443d7)
• Utilize GeoJSON for data objects.
• Provide a stream of rendered tiles, instead of writing files.
• Render points. (3d1c44e)
• Render polylines.
• Render polygons.
• Optimize object rendering.
• Complete writing documentation.
• Complete examples/wiki.
• Support configuration files.
• Support WebHooks and/or events for rendering lifecycle.
• Support exporting a manifest that would include all rendered tiles, E-Tags, labels, etc.
• Research into replacing the canvas dependency with something better, or with something that does not have so many other dependencies (Cairo specifically.)
• Render tiles other than 256px squares.

Derivatives

• A file writer.
• A configurable HTTP server.
• A CLI application.

Dependencies

• Using typescript for source code.
• Using JSONStream for non-blocking JSON reading/writing.
• Using sharp for overlapping PNG files.
• Using canvas for HTML5-like canvas interaction (this includes following the canvas instructions to install Cairo, too.)
• Using upng-js for PNG encoding/decoding.
• Using pako for zlib-like inflation/deflation.