Geoserver+Openlayers拉框查詢

番茄西紅柿發布于2019-04-23 11:46 / 1793人閱讀

摘要：注意的版本號，高版本存在中新語法不兼容的情況查詢類型點擊多邊形拉框圖層名稱，可以是單個或多個重點，不要改變回調函數聲明加載函數傳參解決跨域的關鍵回調回調函數使用載入要素用于刪除之前的框，表示號，隨便取一個刪除之前的部分

<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title>OpenLayers</title>
    <link rel="stylesheet" href="geoserver/ol.css" type="text/css">
    <script src="geoserver/ol.js"></script>
    <script src="bower_components/jquery/dist/jquery.min.js"></script>
    <link rel="stylesheet" href="plugins/layui-v2.4.3/layui/css/layui.css">
    <script src="plugins/layui-v2.4.3/layui/layui.js" charset="utf-8"></script>
    <link rel="stylesheet" href="https://openlayers.org/en/v3.20.1/css/ol.css" type="text/css">
    <#--注意openlayer的版本號，高版本存在es6中新語法不兼容的情況-->
    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
    <script src="https://openlayers.org/en/v3.20.1/build/ol.js"></script>
</head>
<style>
    #map {
        height: 600px;
        /*width: 1024px;*/
        /* float: left;*/
    }
</style>
<body>
<div id="map">
<form class="form-inline">
    <label>查詢類型</label>
    <select id="type">
        <option value="None">None</option>
        <option value="Point">點擊</option>
        <option value="Polygon">多邊形</option>
        <option value="Circle">拉框</option>
    </select>
</form>
</div>
<script>
    var map = new ol.Map({
        target: 'map',
        view: new ol.View({
            projection: 'EPSG:4326',
            center: [104.07, 30.72],
            zoom: 7
        })
    });
    var wfsParams = {
        service: 'WFS',
        version: '1.1.1',
        request: 'GetFeature',
        typeName: 'map_dz:tl_lx_g',  //圖層名稱，可以是單個或多個
        outputFormat: 'text/javascript',  //重點，不要改變
        format_options: 'callback:loadFeatures'  //回調函數聲明
    };
 
    var vectorSource = new ol.source.Vector({
        format: new ol.format.GeoJSON(),
        loader: function (extent, resolution, projection) {  //加載函數
            var url = 'http://192.168.1.113:8080/geoserver/map_dz/wms';
            $.ajax({
                url: url,
                data: $.param(wfsParams),   //傳參
                type: 'GET',
                dataType: 'jsonp',   //解決跨域的關鍵
                jsonpCallback: 'loadFeatures'  //回調
 
            });
        },
        strategy: ol.loadingstrategy.tile(new ol.tilegrid.createXYZ({
            maxZoom: 20
        })),
        projection: 'EPSG:4326'
    });
    //回調函數使用
    window.loadFeatures = function (response) {
        vectorSource.addFeatures((new ol.format.GeoJSON()).readFeatures(response));  //載入要素
    };
    var vectorLayer = new ol.layer.Vector({
        source: vectorSource,
        style: new ol.style.Style({
            stroke: new ol.style.Stroke({
                color: 'rgba(0, 0, 255, 1.0)',
                width: 2
            })
        })
    });
    map.addLayer(vectorLayer);
    var draw;
    var typeSelect = document.getElementById('type');
    var value;
    var num=10;//用于刪除之前的框，表示號，隨便取一個
    function addInteraction() {
        if (value !== 'None') {
            if (value === 'Polygon') {
                draw = new ol.interaction.Draw({
                    source: vectorLayer.getSource(),
                    style: new ol.style.Style({
                        stroke: new ol.style.Stroke({
                            color: '#ffcc33',
                            width: 2
                        }),
                        image: new ol.style.Circle({
                            radius: 7,
                            fill: new ol.style.Fill({
                                color: '#ffcc33'
                            })
                        })
                    }),
                    type: value
                });
            } else if (value === 'Circle') {
                draw = new ol.interaction.Draw({
                    source: vectorLayer.getSource(),
                    style: new ol.style.Style({
                        stroke: new ol.style.Stroke({
                            color: '#ffcc33',
                            width: 2
                        }),
                        image: new ol.style.Circle({
                            radius: 7,
                            fill: new ol.style.Fill({
                                color: '#ffcc33'
                            })
                        })
                    }),
                    type: value,
                    geometryFunction: ol.interaction.Draw.createBox()
                });
            } else if (value === 'Point') {
                draw = new ol.interaction.Draw({
                    source: vectorLayer.getSource(),
                    style: new ol.style.Style({
                        stroke: new ol.style.Stroke({
                            color: '#ffcc33',
                            width: 2
                        }),
                        image: new ol.style.Circle({
                            radius: 7,
                            fill: new ol.style.Fill({
                                color: '#ffcc33'
                            })
                        })
                    }),
                    type: value
                });
            }
 
            map.addInteraction(draw);
            //刪除之前draw的部分
            draw.on('drawstart',function(evt) {
                var featureAdd=vectorLayer.getSource().getFeatureById(num);
                if(featureAdd!=null){
                    vectorLayer.getSource().removeFeature(featureAdd);
                }
            });
            //繪圖結束，處理選中部分
            draw.on('drawend',function(e){
                e.feature.setId(num);
                var geom=e.feature.getGeometry();
                var coor = geom.v;
                mapSelect(coor);
            });
        }
    }
    //選擇事件
    typeSelect.onchange = function() {
        value = typeSelect.value;
        map.removeInteraction(draw);
        addInteraction();
    };
 
    //draw圖像與原始數據相交
    function mapSelect(coor) {
        if(value=='Point') {
            coor = [coor[0]-0.0001,coor[1]-0.0001,coor[0]+0.0001,coor[1]+0.0001];
        }
        var FILTER = '<Filter xmlns:ogc="http://www.opengis.net/ogc" xmlns:gml="http://www.opengis.net/gml"><BBOX><PropertyName>geom</PropertyName><gml:Envelope srsName="EPSG:4326"><gml:lowerCorner>' + coor[0] + '  ' + coor[1] + '</gml:lowerCorner><gml:upperCorner>' + coor[2] + '  ' + coor[3] + '</gml:upperCorner></gml:Envelope></BBOX></Filter>';
        getFeature({
            typename: 'map_dz:tl_lx_g',//查詢的服務圖層名稱
            filter: FILTER,//查詢條件
            callback: 'getIdentifyroadGrid'//查詢的回調函數
        });
    }
    var selectNum=[];
    var geojsonFormat = new ol.format.GeoJSON({defaultDataProjection: "EPSG:4326"});
    function getIdentifyroadGrid(res) {
        var queryData = [];
        var features = geojsonFormat.readFeatures(res);
 
       for (var nu = 0; nu<selectNum.length;nu++) {
            var featureSelect=vectorLayer.getSource().getFeatureById(selectNum[nu]);
            if(featureSelect!=null) {
                featureSelect.setStyle(
                        new ol.style.Style({
                            stroke: new ol.style.Stroke({
                                color: 'rgba(0, 0, 255, 1.0)',
                                width: 2
                            })
                        }));
            }
        }
        selectNum=[];
        for (var i = 0; i < features.length; i++) {
            var feature = features[i];
            console.log(feature);
            selectNum.push(feature.f);
            var featureSelectCurrent=vectorLayer.getSource().getFeatureById(feature.f);
            featureSelectCurrent.setStyle(
                    new ol.style.Style({
                        stroke: new ol.style.Stroke({
                            color: '#ff4118',
                            width: 2
                        })
                    }));
            var lxmc = feature.H["lxmc"];
            var ldbm = feature.H["ldbm"];
            var lxbh = feature.H["lxbh"];
            var result = {
                "lxmc": lxmc,
                "ldbm": ldbm,
                "lxbh": lxbh,
                "setindex": i
            };
            queryData.push(result)
        }
        console.log(selectNum);
        var tableIns=null;
        var dataTable = "<table class="layui-table" lay-filter="demo" id="joinTab"></table>";
        layui.use(['table', 'layer'], function () {
            var table = layui.table;
            var layer = layui.layer;
            var index = layer.open({
                type: 1 //Page層類型
                , title: '要素屬性'
                , shade: 0 //遮罩透明度
                , anim: 0 //0-6的動畫形式，-1不開啟
                , content: dataTable
                , offset: ['250px', '290px']
                , zIndex: 1
                , scrollbar: false
                , resize: false
                , skin: 'layui-layer-molv'
                , closeBtn: 2
                , btn: ["關閉"]
                , yes: function (index) {
                    layer.close(index);
                }
                , cancel: function () {
                }
            });
            tableIns = table.render({
                elem: "#joinTab",
                width: "auto",
                height: "auto",
                data: queryData,
                initSort: {field: 'lxbh', type: 'desc'},
                cols: [[
                    {field: 'lxmc', title: '路線名稱', width: 150, align: 'center', sort: true},
                    {field: 'ldbm', title: '路線編號', width: 150, align: 'center', sort: true},
                    {field: 'lxbh', title: '路段編碼', width: 150, align: 'center', sort: true}
                ]]
            });
            layer.style(index, {
                opacity: 0.8
            });
        });
 
        if (tableIns) {
            tableIns.reload({
                data: queryData
            });
        } else {
            // console.log("Do Nothing!");
        }
    }
 
    //請求wfs數據
    function getFeature(options) {
        $.ajax(/*'http://192.168.1.113:8080/geoserver/map_dz/wms', */{
            type: 'GET',
            url: 'http://192.168.1.113:8080/geoserver/map_dz/wms',
            data: {
                service: 'WFS',
                version: '1.1.1',
                request: 'GetFeature',
                typename: options.typename,
                srsname: options.srid,
                outputFormat: 'text/javascript',
                viewparams: options.viewparams,
                bbox: (options.extent === undefined) ? undefined : options.extent.join(',') + ',' + options.srid,
                filter: options.filter
            },
            dataType: 'jsonp',
            jsonp: 'format_options',
            jsonpCallback: 'callback:' + options.callback
        });
 
    }
 
</script>
</body>
</html>

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