OpenLayers - Cesium integration library. Create your map using OpenLayers 3, and visualize it on a globe with Cesium.
Switch smoothly between 2D and 3D and synchronize:
- Map context (bounding box and zoom level);
- Raster data sources;
- Vector data sources in 2D and 3D;
- Map selection (selected items).
Stay tuned for more exciting features like animated transitions between map and globe view, and synchronization of maps in projections other than EPSG:4326 and EPSG:3857.
To obtain OL3-Cesium, either download a release from https://github.com/openlayers/ol3-cesium/releases, or clone the repository and build it yourself (see below).
Applications using this OL3-Cesium distribution also need to load OpenLayers and Cesium resources (all included in the distribution):
<link rel="stylesheet" href="ol3/css/ol.css" type="text/css">
<script src="ol3/ol.js"></script>
<script src="Cesium/Cesium.js"></script>
<script src="ol3cesium.js"></script>An OpenLayers map can be switched to a 3d globe view by running the code below after the map has been created:
var ol3d = new olcs.OLCesium({map: map}); // map is the ol.Map instance
ol3d.setEnabled(true);The above will use the WGS84 ellipsoid all around the globe. To use terrain, simply add a terrain provider using the Cesium API (can be your own, but in the snippet below it's one that ships with Cesium):
var ol3d = new olcs.OLCesium({map: map}); // map is the ol.Map instance
var scene = ol3d.getCesiumScene();
var terrainProvider = new Cesium.CesiumTerrainProvider({
url: '//cesiumjs.org/stk-terrain/tilesets/world/tiles'
});
scene.terrainProvider = terrainProvider;
ol3d.setEnabled(true);Requirements for building OL3-Cesium:
To get started, clone the OL3-Cesium repository with its submodules:
$ git clone --recursive https://github.com/openlayers/ol3-cesium.git
Change into the clone directory, and invoke
$ make dist
from the root of the repository. You will then be able to use dist/ol3cesium.js for your applications.
This is useful for contributing to OL3-Cesium, because it loads the source files instead of a minified build:
$ make serve
will make the distribution examples available at http://localhost:3000/