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three-geojson-geometry

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ThreeJS geometry to stroke GeoJSON objects on a sphere

three-geojson-geometry 최신버젼 다운로드

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ThreeJS GeoJSON Geometry
========================

[![NPM package][npm-img]][npm-url]
[![Build Size][build-size-img]][build-size-url]
[![NPM Downloads][npm-downloads-img]][npm-downloads-url]

A ThreeJS geometry class for stroking GeoJSON objects on a sphere.

## Quick start

```js
import GeoJsonGeometry from 'three-geojson-geometry';
```
or using a *script* tag
```html
<script src="//unpkg.com/three-geojson-geometry"></script>
```
then
```js
const myLine = new THREE.Line(
 new GeoJsonGeometry(geoJson),
 new THREE.LineBasicMaterial({ color: 'blue' })
);

```

## API reference

### Constructor

GeoJsonGeometry(geoJson: GeoJson object, radius: Float, resolution: Float)

* geoJson: A GeoJson `geometry` object. It's recommended to split the geometries at the [anti-meridian](https://en.wikipedia.org/wiki/180th_meridian). Each `coordinates` point is expected to include longitude and latitude in that order. Altitude may be included as a third optional element, interpreted as elevation above the surface in regular cartesian units.
* radius: Radius of the sphere surface to draw the poygon on. Default is `1`.
* resolution: Resolution of the sphere, in lat/lng degrees. If the angular distance between two adjacent line points is larger than this value, the line segment will be interpolated in order to approximate the curvature of the sphere surface. Lower values yield more perfectly curved lines, at the cost of performance. Default is `5`.

### Properties

.parameters: Object

An object with a property for each of the constructor parameters. Any modification after instantiation does not change the geometry.

### Groups

When generating `Polygon` or `MultiPolygon` geometries, two groups are provided to which different materials can be applied.

* 0: The outer ring of the polygon.
* 1: The polygon inner holes (if any).

### Object types

Different geoJson types should be represented using different ThreeJS object types:
* `Point` and `MultiPoints` - Use `THREE.Points`
* `LineString` and `Polygon` - Use `THREE.Line`
* `MultiLineString` and `MultiPolygon` - Use `THREE.LineSegments`

[npm-img]: https://img.shields.io/npm/v/three-geojson-geometry
[npm-url]: https://npmjs.org/package/three-geojson-geometry
[build-size-img]: https://img.shields.io/bundlephobia/minzip/three-geojson-geometry
[build-size-url]: https://bundlephobia.com/result?p=three-geojson-geometry
[npm-downloads-img]: https://img.shields.io/npm/dt/three-geojson-geometry
[npm-downloads-url]: https://www.npmtrends.com/three-geojson-geometry

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