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https://github.com/fboes/geojson
This dual-purpose library creates GeoJSON according to RFC 7946 in NodeJS as well as directly in your browser.
https://github.com/fboes/geojson
Last synced: about 16 hours ago
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This dual-purpose library creates GeoJSON according to RFC 7946 in NodeJS as well as directly in your browser.
- Host: GitHub
- URL: https://github.com/fboes/geojson
- Owner: fboes
- License: mit
- Created: 2024-02-01T15:54:45.000Z (10 months ago)
- Default Branch: main
- Last Pushed: 2024-06-12T15:32:39.000Z (5 months ago)
- Last Synced: 2024-09-19T05:05:58.537Z (about 2 months ago)
- Language: TypeScript
- Size: 158 KB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- License: LICENSE.txt
Awesome Lists containing this project
README
# GeoJSON
This dual-purpose library creates [GeoJSON](https://geojson.org/) according to [RFC 7946](https://datatracker.ietf.org/doc/html/rfc7946) in NodeJS as well as directly in your browser.
It contains all of the basic object types of GeoJSON geometries:
- `GeoJson.Point` and `GeoJson.MultiPoint`
- `GeoJson.LineString` and `GeoJson.MultiLineString`
- `GeoJson.Polygon` and `GeoJson.MultiPolygon`
- `GeoJson.GeometryCollection`
…and organizational objects:
- `GeoJson.Feature`
- `GeoJson.FeatureCollection`
Why do we need _classes_ to build JSON objects?
- It makes some of the data types of GeoJSON more accessible, as some types like coordinates are just ordered arrays. Now you have named parameters.
- Working with typed objects allows to see how the objects can be combined.
- Adding properties to `Feature` is improved.
## Installation
Either download the [`dist/index.js`](dist/index.js) to a sensible location in your web project, or do a NPM installation:
```bash
npm install @fboes/geojson --save
```
Instead of a local installation you may also load the library from https://unpkg.com/. Beware: This makes https://unpkg.com/ a dependency of your project and may pose data protection issues.
```html
```
Everything required for the functionality of this library is contained in [`dist/index.js`](dist/index.js).
## Usage
Loading the library prior to use:
```javascript
// 1. NodeJS - NPM installation
import GeoJson from "geojson";
// 2. Local installation and/or browser usage
import GeoJson from "dist/index.js";
```
Now you are set to build your GeoJSON:
```javascript
const featureCollection = new GeoJson.FeatureCollection([
new GeoJson.Feature(new GeoJson.Point(1.53946, 51.04571), {
title: "Sailing boat",
"marker-symbol": "harbor",
}),
new GeoJson.Feature(new GeoJson.Point(6.5664576, 58.109285), {
title: "Lighthouse",
"marker-symbol": "lighthouse",
}),
]);
console.log(JSON.stringify(featureCollection));
```
which yields GeoJSON:
```json
{
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
"geometry": { "type": "Point", "coordinates": [1.53946, 51.04571] },
"properties": { "title": "Sailing boat", "marker-symbol": "harbor" }
},
{
"type": "Feature",
"geometry": { "type": "Point", "coordinates": [6.5664576, 58.109285] },
"properties": { "title": "Lighthouse", "marker-symbol": "lighthouse" }
}
]
}
```
## Further readings
- [`simplestyle-spec`](https://github.com/mapbox/simplestyle-spec): A simple specification for styling GeoJSON data.
- [Maki Icons](https://labs.mapbox.com/maki-icons/): Maki is an icon set made for map designers. Maki includes icons for common points of interest like parks, museums, and places of worship.
- [Mapbox GeoJSON integration](https://docs.mapbox.com/mapbox-gl-js/example/external-geojson/): This example adds GeoJSON data from an external file and uses it in a layer on the map.
## Status
[](https://badge.fury.io/gh/fboes%2Fgeojson)
[](https://badge.fury.io/js/%40fboes%2Fgeojson)
## Legal stuff
Author: [Frank Boës](https://3960.org)
Copyright & license: See [LICENSE.txt](LICENSE.txt)