s2-pmtiles

About

A Modified TypeScript implementation of the PMTiles library. It is backwards compatible but offers support for the S2 Projection.

Read The Spec

s2-pmtiles-spec

For now this spec supports deflating metadata/directories inside the browser, but it will be removed in the future.

Install

#bun
bun add s2-pmtiles
# pnpm
pnpm add s2-pmtiles
# yarn
yarn add s2-pmtiles
# npm
npm install s2-pmtiles

# cargo
cargo install s2-pmtiles

Example use

import { S2PMTilesReader, S2PMTilesWriter, TileType } from 's2-pmtiles'
import { FileReader, FileWriter } from 's2-pmtiles/file';

// The File Reader you can run on bun/node/deno
const testFixture1 = new S2PMTilesReader(new FileReader('test/fixtures/test_fixture_1.pmtiles'));
// get an WM tile
let x = 0;
let y = 0;
let z = 0;
let face = 0;
testFixture1.getTile(x, y, z); // undefied | Uint8Array
// get an S2 tile
testFixture1.getTileS2(face, x, y, z); // undefined | Uint8Array

// The File Writer you can run on bun/node/deno
const testFixture2 = new S2PMTilesWriter(new FileWriter('tmpFile.pmtiles'), TileType.Pbf);
// write a tile
testFixture2.writeTileXYZ(x, y, z, Uint8Array.from([]));
// write an S2 tile
testFixture2.writeTileS2(face, x, y, z, Uint8Array.from([]));
// when you finish you commit to build the metadata
testFixture2.commit();


// The File Reader you can run in the browser
import { S2PMTilesReader } from 's2-pmtiles';
// you want to add a true after the path for generic PMTiles, as it ensures 206 byte requests.
const browserFixture = new S2PMTilesReader('https://www.example.com/test.pmtiles', true);
// get an WM tile
browserFixture.getTile(x, y, z); // undefied | Uint8Array
// get an S2 tile
browserFixture.getTileS2(face, x, y, z); // undefined | Uint8Array

Browser Support

Some tsconfigs might need some extra help to see the s2-pmtiles/file or s2-pmtiles/mmap package.

To fix this update your tsconfig.json with the following:

{
    "compilerOptions": {
        "baseUrl": "./",
        "paths": {
            "s2-pmtiles/file": ["./node_modules/s2-pmtiles/dist/file.d.ts"],
            "s2-pmtiles/mmap": ["./node_modules/s2-pmtiles/dist/mmap.d.ts"]
        }
    }
}

---

Development

Requirements

You need the tool tarpaulin to generate the coverage report. Install it using the following command:

cargo install cargo-tarpaulin

The bacon coverage tool is used to generate the coverage report. To utilize the pycobertura package for a prettier coverage report, install it using the following command:

pip install pycobertura

Running Tests

To run the tests, use the following command:

# TYPESCRIPT
## basic test
bun run test
## live testing
bun run test:dev

# RUST
## basic test
cargo test
# live testing
bacon test

Generating Coverage Report

To generate the coverage report, use the following command:

cargo tarpaulin
# bacon
bacon coverage # or type `l` inside the tool