This converts KML & GPX to GeoJSON, in a browser or with nodejs.
It is
- Dependency-free
- Tiny
- Written in vanilla javascript that's jshint-friendly
- Tested
It is not
- Concerned about ugly extensions to KML
- Concerned with having an 'internal format' of its own
Want to use this with Leaflet? Try leaflet-omnivore!
Convert a KML document to GeoJSON. The first argument, doc
, must be a KML
document as an XML DOM - not as a string. You can get this using jQuery's default
.ajax
function or using a bare XMLHttpRequest with the .response
property
holding an XML DOM.
The output is a Javascript object of GeoJSON data. You can convert it to a string with JSON.stringify or use it directly in libraries like mapbox.js.
Convert a GPX document to GeoJSON. The first argument, doc
, must be a GPX
document as an XML DOM - not as a string. You can get this using jQuery's default
.ajax
function or using a bare XMLHttpRequest with the .response
property
holding an XML DOM.
The output is a Javascript object of GeoJSON data, same as .kml
outputs.
Install it into your path with npm install -g togeojson
.
~> togeojson file.kml > file.geojson
Install it into your project with npm install --save togeojson
.
// using togeojson in nodejs
var tj = require('togeojson'),
fs = require('fs'),
// node doesn't have xml parsing or a dom. use jsdom
jsdom = require('jsdom').jsdom;
var kml = jsdom(fs.readFileSync('foo.kml', 'utf8'));
var converted = tj.kml(kml);
var converted_with_styles = tj.kml(kml, { styles: true });
Download it into your project like
wget https://raw.github.com/tmcw/togeojson/gh-pages/togeojson.js
<script src='jquery.js'></script>
<script src='togeojson.js'></script>
<script>
$.ajax('test/data/linestring.kml').done(function(xml) {
console.log(toGeoJSON.kml(xml));
});
</script>
toGeoJSON doesn't include AJAX - you can use jQuery for just AJAX.
Supported:
- Point
- Polygon
- LineString
- name & description
- ExtendedData
- SimpleData
- MultiGeometry -> GeometryCollection
- Styles with hashing
- Tracks & MultiTracks with
gx:coords
, including altitude - TimeSpan
- TimeStamp
Not supported yet:
- NetworkLinks
- GroundOverlays
Supported:
- Line Paths
- 'name', 'desc', 'author', 'copyright', 'link', 'time', 'keywords' tags
KML's style system isn't semantic: a typical document made through official tools
(read Google) has hundreds of identical styles. So, togeojson does its best to
make this into something usable, by taking a quick hash of each style and exposing
styleUrl
and styleHash
to users. This lets you work backwards from the awful
representation and build your own styles or derive data based on the classes
chosen.
Implied here is that this does not try to represent all data contained in KML styles.
Have a string of XML and need an XML DOM?
var dom = (new DOMParser()).parseFromString(xmlStr, 'text/xml');