https://github.com/perliedman/geojson-elevation

Add juicy elevation data to your fresh GeoJSON
https://github.com/perliedman/geojson-elevation

Last synced: 4 months ago
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Add juicy elevation data to your fresh GeoJSON

• Host: GitHub
• URL: https://github.com/perliedman/geojson-elevation
• Owner: perliedman
• License: isc
• Created: 2015-04-08T19:30:13.000Z (almost 10 years ago)
• Default Branch: master
• Last Pushed: 2020-05-25T04:09:13.000Z (over 4 years ago)
• Last Synced: 2024-10-31T23:51:26.854Z (4 months ago)
• Language: JavaScript
• Homepage:
• Size: 734 KB
• Stars: 37
• Watchers: 6
• Forks: 7
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

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README

        
GeoJSON Elevation

=================

[![Greenkeeper badge](https://badges.greenkeeper.io/perliedman/geojson-elevation.svg)](https://greenkeeper.io/)

[![npm version](https://img.shields.io/npm/v/geojson-elevation.svg)](https://www.npmjs.com/package/geojson-elevation) [![Build status](https://travis-ci.org/perliedman/geojson-elevation.svg?branch=master)](https://travis-ci.org/perliedman/geojson-elevation)

Add juicy elevation data to your fresh [GeoJSON](http://geojson.org/).

Check out the [demo app](http://www.liedman.net/elevation-service/), if you want to get a feel for it.

## Install

```

npm install --save geojson-elevation

```

## Use

The module exports a single function, `addElevation`:

```js

addElevation(geojson, elevationProvider, cb)

```

Where

* `geojson` is the GeoJSON object to add elevation data to

* `elevationProvider` is an object with the method `getElevation(latLng, cb)` - typically,

  you pass a `TileSet` instance from [node-hgt](https://github.com/perliedman/node-hgt)

* `cb` is a callback that is called when the elevation data has been added (or an error occurs),

  the callback should take to args: `err` (undefined if the operation succeeds) and `geojson`, which

  is the GeoJSON instance that was passed to the function

Example:

```js

var addElevation = require('geojson-elevation').addElevation,

    TileSet = require('node-hgt').TileSet;

addElevation(geojson, new TileSet('./data'), function(err, geojson) {

    if (!err) {

        console.log(JSON.stringify(geojson));

    } else {

        console.log(err);

    }

});

```