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Postcode -> Location lookup using Ordnance Survey Linked Data APIs
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| $(function() { | |
| var form = $("form"); | |
| var button = form.find("button[type=submit]"); | |
| var input = form.find("input[name=postcode]"); | |
| var output = form.find("output[name=location]"); | |
| var map = L.mapbox.map("map", "hubbox.map-u557d78b").setView([54, 0], 6); | |
| var failed = function(data) { | |
| button.html("Failed"); | |
| }; | |
| var lookup = function(event) { | |
| event.preventDefault(); | |
| button.html("Loading…"); | |
| $.ajax({ | |
| type: "GET", | |
| url: "http://beta.data.ordnancesurvey.co.uk/datasets/code-point-open/apis/search", | |
| data: { output: "json", max: 1, query: input.val() }, | |
| dataType: "json", | |
| error: failed, | |
| success: function(data) { | |
| if (!data.results.length) { | |
| return failed(); | |
| } | |
| fetch(data.results[0].link); | |
| } | |
| }); | |
| }; | |
| // can't use result.link directly, as the 303 redirect doesn't have CORS headers | |
| // https://code.google.com/p/chromium/issues/detail?id=237490 | |
| var fakeRedirect = function(placeURI) { | |
| var uri = placeURI | |
| .replace(/^http:\/\//, "http://beta.") | |
| .replace(/\/id\//, "/doc/"); | |
| return uri + ".json"; | |
| }; | |
| var fetch = function(placeURI) { | |
| $.ajax({ | |
| type: "GET", | |
| url: fakeRedirect(placeURI), | |
| dataType: "json", | |
| error: failed, | |
| success: function(data) { | |
| var item = data[placeURI]; | |
| var wardID = item["http://data.ordnancesurvey.co.uk/ontology/postcode/ward"][0].value; | |
| var place = { | |
| latitude: item["http://www.w3.org/2003/01/geo/wgs84_pos#lat"][0].value, | |
| longitude: item["http://www.w3.org/2003/01/geo/wgs84_pos#long"][0].value, | |
| name: data[wardID]["http://www.w3.org/2000/01/rdf-schema#label"][0].value | |
| } | |
| output.val(place.name); | |
| map.setView([place.latitude, place.longitude], 13); | |
| button.html("Lookup"); | |
| } | |
| }); | |
| }; | |
| $("form").submit(lookup); | |
| input.focus(); | |
| }); |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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| <!doctype html> | |
| <meta charset="utf-8"> | |
| <!-- metadata --> | |
| <title>Postcode -> Location via Ordnance Survey</title> | |
| <!-- styles --> | |
| <link rel="stylesheet" href="http://api.tiles.mapbox.com/mapbox.js/v1.0.1/mapbox.css"> | |
| <!-- form --> | |
| <form> | |
| <input type="text" name="postcode" placeholder="postcode"> | |
| <button type="submit">Lookup</button> | |
| <output name="location" for="postcode"></output> | |
| </form> | |
| <!-- map --> | |
| <div id="map" style="width:100%;height:600px;"></div> | |
| <!-- scripts --> | |
| <script src="//ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script> | |
| <script src="http://api.tiles.mapbox.com/mapbox.js/v1.0.1/mapbox.js"></script> | |
| <script src="app.js"></script> |
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