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Data","Uncategorized"],"sub_categories":["GTFS","Uncategorized"],"readme":"# extract-gtfs-shapes\n\nCommand line tool to **extract [shapes](https://gtfs.org/reference/static#shapestxt) from a [GTFS](https://gtfs.org) dataset.**\n\n[![npm version](https://img.shields.io/npm/v/extract-gtfs-shapes.svg)](https://www.npmjs.com/package/extract-gtfs-shapes)\n![ISC-licensed](https://img.shields.io/github/license/derhuerst/extract-gtfs-shapes.svg)\n![minimum Node.js version](https://img.shields.io/node/v/extract-gtfs-shapes.svg)\n[![support me via GitHub Sponsors](https://img.shields.io/badge/support%20me-donate-fa7664.svg)](https://github.com/sponsors/derhuerst)\n[![chat with me on Twitter](https://img.shields.io/badge/chat%20with%20me-on%20Twitter-1da1f2.svg)](https://twitter.com/derhuerst)\n\n\n## Installation\n\n```shell\nnpm install -g extract-gtfs-shapes\n```\n\n\n## Usage\n\n```\nUsage:\n    extract-gtfs-shapes \u003cpath-to-shapes-file\u003e \u003coutput-directory\u003e\nOptions:\n    --concurrency    -c  How many files to write in parallel. Default: 32\n    --quiet          -q  Don't log stats.\nExamples:\n    extract-gtfs-shapes -c 50 data/gtfs/shapes.txt shapes\n    cat data/gtfs/shapes.txt | extract-gtfs-shapes - shapes\nNotes:\n    extract-gtfs-shapes needs the GTFS shapes.txt to be sorted by\n    1. shape_id, alphanumerically\n    2. shape_pt_sequence, numerically\n    You can use Miller (https://miller.readthedocs.io/) and the\n    Unix tool sponge to do this:\n    mlr --csv sort -f shape_id -n shape_pt_sequence \\\n      shapes.txt | sponge shapes.txt\n```\n\n### from JavaScript\n\nLet's build a simple (and slower) clone of the the `extract-gtfs-shapes` CLI tool documented above:\n\n```js\nconst {writeFile} = require('fs/promises')\nconst extractGTFSShapes = require('extract-gtfs-shapes')\n\nconst processShape = async (shapeId, shape) =\u003e {\n    await writeFile(shapeId + 'geo.json', shape)\n}\nawait extractGTFSShapes('path/to/shapes.txt', processShape)\n```\n\n\n## Contributing\n\nIf 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).\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fderhuerst%2Fextract-gtfs-shapes","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fderhuerst%2Fextract-gtfs-shapes","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fderhuerst%2Fextract-gtfs-shapes/lists"}