1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 | <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>OpenLayers BBOX Strategy Example</title> <link rel="stylesheet" href="../theme/default/style.css" type="text/css" /> <link rel="stylesheet" href="style.css" type="text/css" /> <script src="../lib/OpenLayers.js"></script> <script type="text/javascript"> var map, photos; OpenLayers.ProxyHost = (window.location.host == "localhost") ? "/cgi-bin/proxy.cgi?url=" : "proxy.cgi?url="; function init() { map = new OpenLayers.Map('map', { restrictedExtent: new OpenLayers.Bounds(-180, -90, 180, 90) }); var base = new OpenLayers.Layer.WMS("Imagery", ["http://t1.hypercube.telascience.org/tiles?", "http://t2.hypercube.telascience.org/tiles?", "http://t3.hypercube.telascience.org/tiles?", "http://t4.hypercube.telascience.org/tiles?"], {layers: 'landsat7'} ); var style = new OpenLayers.Style({ externalGraphic: "${img_url}", pointRadius: 30 }); photos = new OpenLayers.Layer.Vector("Photos", { strategies: [new OpenLayers.Strategy.BBOX()], protocol: new OpenLayers.Protocol.HTTP({ url: "http://labs.metacarta.com/flickrbrowse/flickr.py/flickr", params: { format: "WFS", sort: "interestingness-desc", service: "WFS", request: "GetFeatures", srs: "EPSG:4326", maxfeatures: 10 }, format: new OpenLayers.Format.GML() }), styleMap: new OpenLayers.StyleMap(style) }); map.addLayers([base, photos]); map.setCenter(new OpenLayers.LonLat(-116.45, 35.42), 5); } </script> </head> <body onload="init()"> <h1 id="title">BBOX Strategy Example</h1> <p id="shortdesc"> Uses a BBOX strategy to request features within a bounding box. </p> <div id="map" class="smallmap"></div> <div id="docs"> <p>The BBOX strategy requests data within a bounding box. When the previously requested data bounds are invalidated (by browsing to some area not covered by those bounds), another request for data is issued.</p> </div> </body> </html> |