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221 lines
7.4 KiB
221 lines
7.4 KiB
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>Open Street Map</title>
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<meta http-equiv="content-type" content="application/xhtml+xml; charset=UTF-8" />
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<style type="text/css" media="all">
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html, body, #map {
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width: 100%;
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height: 100%;
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margin: 0;
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position: relative;
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z-index: 0;
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font-family: sans-serif;
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}
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#search_form {
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position: absolute;
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z-index: 1;
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bottom: 2.5em;
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right: 0.5em;
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}
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#layout_switch {
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position: absolute;
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bottom: 15px;
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left: 140px;
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z-index: 1;
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}
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#layout_switch a {
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color: black;
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}
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#layout_switch a:visited {
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color: black;
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}
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#layout_switch a:hover {
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color: white;
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background-color: black;
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opacity: 0.5;
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}
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.olControlPanZoom {
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top: auto !important;
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bottom: 173px; /* .olControlScaleLine.bottom = 15 + .olControlScaleLine.bottom = 26 + margin = 15px + #OpenLayers.Control.PanZoom_5_zoomout = 99 + #OpenLayers.Control.PanZoom_5_zoomout = 18 */
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}
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.olControlAttribution {
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right: 0.5em !important;
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bottom: 15px !important;
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}
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</style>
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<script src="api/OpenLayers.js" type="text/javascript"></script>
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<script src="js/jquery-1.7.2.min.js" type="text/javascript"></script>
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<script type="text/javascript">
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<!--
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/*
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* OpenStreetMap Widget
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* ==========================================================
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* Copyright (C) Université Claude Bernard Lyon 1 (ICAP), Délégation Interministérielle à l'Éducation Numérique en Afrique, Guillaume Burel, 2012
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* API identifier */
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var geonamesUser = "yimgo";
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/* map variable will be used to manipulate the map. This will be initialized like an OpenLayers.Map object. */
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var map;
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/* updateMap() allow user to modify the considered zone, in case a change has been requested (e.g. user request) */
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function updateMap(coordinates) {
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/* transforming given coordinates, which have to be expressed in WGS-1984 projection, to map's projection */
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var position = new OpenLayers.LonLat(coordinates["lng"], coordinates["lat"]).transform(new OpenLayers.Projection("EPSG:4326"), map.getProjectionObject());
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/* centering in position with given zoom */
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map.setCenter(position, coordinates["zoom"]);
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}
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/* doSearch() performs the request to geonames server with the given query, and updates the map in case of success. */
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function doSearch(query) {
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/* performing request with JSON API from geonames and global username (identifying request's author). Asking for only one result, to save resources and to allow the user to avoid a choice when doing the research. */
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$.ajax({
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url: "http://api.geonames.org/searchJSON",
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dataType: 'json',
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data: {
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q: encodeURIComponent(query),
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maxRows: "1",
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username: geonamesUser
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},
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success: function(data) {
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/* updating the map if response is ok */
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if (typeof data["geonames"][0]!= 'undefined') {
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var coordinates = new Array();
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coordinates["lng"] = data["geonames"][0].lng;
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coordinates["lat"] = data["geonames"][0].lat;
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/* if position represents a country, setting the zoom to 6 */
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if (data["geonames"][0].fcl == "A")
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coordinates["zoom"] = 6;
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else
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coordinates["zoom"] = 12;
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updateMap(coordinates);
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}
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}
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});
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}
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/*
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* doNominatim() could use Nominatim API (http://wiki.openstreetmap.org/wiki/Nominatim).
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* It is not used because first result is not always pertinent and we want to avoid user to make a choice after his request.
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* Bounding box info provided by Nominatim could be a good way to set the right zoom for request (instead of having a determined zoom for countries and cities).
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* Nominatim allows user (the developer in this case) to set the language to display informations provided in sankoré user native language.
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*/
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function doNominatim(query) {
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$.ajax({
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url: "http://nominatim.openstreetmap.org/search",
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dataType: "json",
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data: {
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q: query,
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format: "json",
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limit: "10",
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addressdetails: "1"
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},
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success: function(data) {
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/* updating the map if response is ok */
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if (typeof data[0]!= 'undefined') {
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var coordinates = new Array();
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coordinates["lng"] = data[0].lon;
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coordinates["lat"] = data[0].lat;
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/* if position represents a city, setting the zoom to 12 */
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if (data[0].address.state)
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coordinates["zoom"] = 12;
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else
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coordinates["zoom"] = 6;
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updateMap(coordinates);
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}
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}
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});
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}
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window.onload = function() {
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map = new OpenLayers.Map({
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div: "map"
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});
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/* limiting max zoom, by overriding OpenLayers.Map::moveTo function */
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map.newMoveTo = map.moveTo;
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map.moveTo = function(lonlat, zoom, options) {
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return(zoom >= 0 && zoom <= 17) ? map.newMoveTo(lonlat,zoom,options) : false;
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};
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/* Standard layer */
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classic = new OpenLayers.Layer.OSM("Classic");
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/* avoiding out of bounds requests */
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classic.displayOutsideMaxExtent = false;
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/* Landscape layer */
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relief = new OpenLayers.Layer.OSM("Relief", [
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'http://a.tile3.opencyclemap.org/landscape/${z}/${x}/${y}.png',
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'http://b.tile3.opencyclemap.org/landscape/${z}/${x}/${y}.png',
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'http://c.tile3.opencyclemap.org/landscape/${z}/${x}/${y}.png'
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]);
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relief.displayOutsideMaxExtent = false;
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/* then adding layers to the map */
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map.addLayers([classic, relief]);
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/* displaying scale line, allowing user to represent distances */
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map.addControl(new OpenLayers.Control.ScaleLine());
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/* then zomming to get a better overview of the worldmap */
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map.zoomTo(2);
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/* doSearch is called when form is submitted */
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$("#search_form").submit(function (event) {
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doSearch($("#query").val());
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return false;
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});
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/* allowing user to simply switch between classic and relief layers */
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$("#layout_switch > a").click(function (event) {
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newLayer = $(this).text() == "Relief" ? relief : classic;
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newText = $(this).text() == "Relief" ? "Classic" : "Relief";
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$(this).text(newText);
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map.setBaseLayer(newLayer);
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return false;
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});
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};
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-->
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</script>
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</head>
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<body>
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<div id="map">
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</div>
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<div id="layout_switch">
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<a href="#">Relief</a>
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</div>
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<form method="post" id="search_form" action="#" accept-charset="UTF-8">
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<p>
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<input type="text" value="" tabindex="1" id="query" />
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<input type="submit" value="Go" />
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</p>
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</form>
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</body>
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</html>
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