https://github.com/derhuerst/extract-gtfs-shapes

Extract shapes from a GTFS dataset.
https://github.com/derhuerst/extract-gtfs-shapes

cli geojson gtfs public-transport transit

Last synced: 14 days ago
JSON representation

Extract shapes from a GTFS dataset.

• Host: GitHub
• URL: https://github.com/derhuerst/extract-gtfs-shapes
• Owner: derhuerst
• License: isc
• Created: 2021-02-25T15:25:00.000Z (almost 4 years ago)
• Default Branch: main
• Last Pushed: 2021-05-20T16:21:33.000Z (over 3 years ago)
• Last Synced: 2024-12-25T00:30:37.949Z (28 days ago)
• Topics: cli, geojson, gtfs, public-transport, transit
• Language: JavaScript
• Homepage: https://github.com/derhuerst/extract-gtfs-shapes#extract-gtfs-shapes
• Size: 21.5 KB
• Stars: 5
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: readme.md
  • License: license.md

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README

        
# extract-gtfs-shapes

Command line tool to **extract [shapes](https://gtfs.org/reference/static#shapestxt) from a [GTFS](https://gtfs.org) dataset.**

[![npm version](https://img.shields.io/npm/v/extract-gtfs-shapes.svg)](https://www.npmjs.com/package/extract-gtfs-shapes)

![ISC-licensed](https://img.shields.io/github/license/derhuerst/extract-gtfs-shapes.svg)

![minimum Node.js version](https://img.shields.io/node/v/extract-gtfs-shapes.svg)

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## Installation

```shell

npm install -g extract-gtfs-shapes

```

## Usage

```

Usage:

    extract-gtfs-shapes  

Options:

    --concurrency    -c  How many files to write in parallel. Default: 32

    --quiet          -q  Don't log stats.

Examples:

    extract-gtfs-shapes -c 50 data/gtfs/shapes.txt shapes

    cat data/gtfs/shapes.txt | extract-gtfs-shapes - shapes

Notes:

    extract-gtfs-shapes needs the GTFS shapes.txt to be sorted by

    1. shape_id, alphanumerically

    2. shape_pt_sequence, numerically

    You can use Miller (https://miller.readthedocs.io/) and the

    Unix tool sponge to do this:

    mlr --csv sort -f shape_id -n shape_pt_sequence \

      shapes.txt | sponge shapes.txt

```

### from JavaScript

Let's build a simple (and slower) clone of the the `extract-gtfs-shapes` CLI tool documented above:

```js

const {writeFile} = require('fs/promises')

const extractGTFSShapes = require('extract-gtfs-shapes')

const processShape = async (shapeId, shape) => {

    await writeFile(shapeId + 'geo.json', shape)

}

await extractGTFSShapes('path/to/shapes.txt', processShape)

```

## Contributing

If you have a question or need support using `extract-gtfs-shapes`, please double-check your code and setup first. If you think you have found a bug or want to propose a feature, use [the issues page](https://github.com/derhuerst/extract-gtfs-shapes/issues).