Restricting layer rendering to a limited extent.
This example uses the layer.setExtent() method to modify the extent of the overlay layer. Use the controls below to limit rendering based on an extent.
layer.setExtent()
<!DOCTYPE html> <html> <head> <title>Limited Layer Extent</title> <script src="https://code.jquery.com/jquery-1.11.2.min.js"></script> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css"> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script> <link rel="stylesheet" href="http://openlayers.org/en/3.8.1/css/ol.css" type="text/css"> <script src="http://openlayers.org/en/3.8.1/build/ol.js"></script> </head> <body> <div class="container-fluid"> <div class="row-fluid"> <div class="span12"> <div id="map" class="map"></div> </div> </div> <div class="btn-group"> <button type="button" class="btn btn-default" id="northwest">northwest</button> <button type="button" class="btn btn-default" id="northeast">northeast</button> <button type="button" class="btn btn-default" id="southeast">southeast</button> <button type="button" class="btn btn-default" id="southwest">southwest</button> <button type="button" class="btn btn-default" id="world">world</button> </div> </div> <script> function transform(extent) { return ol.proj.transformExtent(extent, 'EPSG:4326', 'EPSG:3857'); } var extents = { northwest: transform([-180, 0, 0, 85]), northeast: transform([0, 0, 180, 85]), southeast: transform([0, -85, 180, 0]), southwest: transform([-180, -85, 0, 0]), world: transform([-180, -85, 180, 85]) }; var base = new ol.layer.Tile({ source: new ol.source.TileJSON({ url: 'http://api.tiles.mapbox.com/v3/' + 'mapbox.world-black.jsonp', crossOrigin: 'anonymous' }) }); var overlay = new ol.layer.Tile({ extent: extents.northwest, source: new ol.source.TileJSON({ url: 'http://api.tiles.mapbox.com/v3/' + 'mapbox.world-glass.jsonp', crossOrigin: 'anonymous' }) }); var map = new ol.Map({ layers: [base, overlay], target: 'map', view: new ol.View({ center: [0, 0], zoom: 1 }) }); for (var key in extents) { document.getElementById(key).onclick = function(event) { overlay.setExtent(extents[event.target.id]); }; } </script> </body> </html>