1. 加载地图
1) 加载底图
var map;
var layer;
var drawLayer;
var drawControl;
var highLtLayer;
function init() {
// 添加地图容器
map = new OpenLayers.Map('map1',
{
controls: [
new OpenLayers.Control.PanZoomBar(),
new OpenLayers.Control.LayerSwitcher(),
new OpenLayers.Control.Navigation(),
new OpenLayers.Control.MousePosition()
]
}
);
// 添加图层
layer = new Zondy.Map.Doc('MDZZ', 'WorldMKT', {
ip: "127.0.0.1",
port: '6163',
isBaseLayer: true
});
map.addLayers([layer]);
map.setCenter(new OpenLayers.LonLat(11544046, 4312771), 3);
<!--调用函数创建绘制图层-->
initDraw();
}
2) 添加一个绘制图层
function initDraw() {
// 添加一个绘制图层
drawLayer = new OpenLayers.Layer.Vector("DrawLayer");
map.addLayer(drawLayer);
// 创建并添加控件 点
drawControl = new OpenLayers.Control.DrawFeature(drawLayer, OpenLayers.Handler.Point);
<!--调用callBack函数将查询到的要素添加到绘图控件中(可能不对..忘了)-->
drawControl.featureAdded = callBack;
<!--添加地图控件-->
map.addControl(drawControl);
}
3) 创建图层用于高亮显示
function initHighLtLayer() {
// 添加一个用于高亮显示的图层
highLtLayer = new OpenLayers.Layer.Vector("Highlight");
map.addLayer(highLtLayer);
}
2.查询
查询5步曲
a.创建查询结构
b.创建查询形状
c.创建查询参数
d.创建查询服务
e.开始查询
function callBack(feature) {
// 创建查询结构
var queryStruct = new Zondy.Service.QueryFeatureStruct(
{
// 要查询的信息
IncludeGeometry: true,
IncludeAttribute: true,
IncludeGraphic: true
}
);
// 创建查询形状
var pointObj = new Zondy.Object.PointForQuery();
// 传入OpenLayer的点的坐标
pointObj.setByOL(feature.geometry);
// 在点击下一个点时清除之前的点
feature.destroy();
// 创建查询参数
var queryParm = new Zondy.Service.QueryParameter(
{
geometry:pointObj,
resultFormat:"json",
struct:queryStruct
});
// 创建查询服务
var queryService =new Zondy.Service.QueryDocFeature(queryParm,"WorldMKT",1,{
ip:"127.0.0.1",
port:"6163"
});
// 开始查询
queryService.query(onSuccess);
}
查询按钮的点击事件
function startQuery() {
if (drawControl) {
drawControl.activate();//激活绘图控件
}
}
回调函数 onSuccess
function onSuccess(data) {
var formatData = JSON.stringify(data);
Process(formatData, 1, "resultTable");
// 如果存在已经高亮的图层则销毁,通过initHighLtLayer()重建要高亮显示的新图层
if(highLtLayer) {
highLtLayer.destroy();
}
//初始化高亮图层
initHighLtLayer();
// 高亮显示
var format = new Zondy.Format.PolygonJSON();
var features = format.read(data);
highLtLayer.setVisibility(true);//将图层设为可见
highLtLayer.addFeatures(features);//将要素添加到图层中
}
3.代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<link href="../css/mapDefault.css" type="text/css" rel="stylesheet"/>
<script src="../libs/jquery-1.7.1.min.js" type="text/javascript"></script>
<script src="../libs/OpenLayers.js" type="text/javascript"></script>
<script src="../libs/zdclient.js" type="text/javascript"></script>
<script src="../libs/jsonformat/json2.js" type="text/javascript"></script>
<script src="../libs/jsonformat/jsonExtend.js" type="text/javascript"></script>
<script type="text/javascript">
var map;
var layer;
var drawLayer;
var drawControl;
var highLtLayer;
function init() {
// 创建地图容器
map = new OpenLayers.Map("map1", {
// 添加控件
controls: [
new OpenLayers.Control.Navigation(),
new OpenLayers.Control.MousePosition(),
new OpenLayers.Control.LayerSwitcher(),
new OpenLayers.Control.OverviewMap()
]
});
layer = new Zondy.Map.Doc("BaseLayer", "WorldMKT", {
ip: "127.0.0.1",
port: "6163",
isBaseLayer: true
});
// 添加图层
map.addLayers([layer]);
// 设置显示中心和级别
map.setCenter(new OpenLayers.LonLat(11544046, 4312771), 3);
initDraw();
}
function initDraw() {
// 添加一个绘制图层
drawLayer = new OpenLayers.Layer.Vector("DrawLayer");
map.addLayer(drawLayer);
// 创建并添加控件 点
drawControl = new OpenLayers.Control.DrawFeature(drawLayer, OpenLayers.Handler.Point);
drawControl.featureAdded = callBack;
map.addControl(drawControl);
}
function initHighLtLayer() {
// 添加一个用于高亮显示的图层
highLtLayer = new OpenLayers.Layer.Vector("Highlight");
map.addLayer(highLtLayer);
}
function callBack(feature) {
// 创建查询结构
var queryStruct = new Zondy.Service.QueryFeatureStruct(
{
// 要查询的信息
IncludeGeometry: true,
IncludeAttribute: true,
IncludeGraphic: true
}
);
// 创建查询形状
var pointObj = new Zondy.Object.PointForQuery();
// 传入OpenLayer的点的坐标
pointObj.setByOL(feature.geometry);
// 在点击下一个点时清除之前的点
feature.destroy();
// 创建查询参数
var queryParm = new Zondy.Service.QueryParameter(
{
geometry:pointObj,
resultFormat:"json",
struct:queryStruct
});
// 创建查询服务
var queryService =new Zondy.Service.QueryDocFeature(queryParm,"WorldMKT",1,{
ip:"127.0.0.1",
port:"6163"
});
// 开始查询
queryService.query(onSuccess);
}
function startQuery() {
if (drawControl) {
drawControl.activate();//激活绘图控件
}
}
function onSuccess(data) {
var formatData = JSON.stringify(data);
Process(formatData, 1, "resultTable");
// 如果存在已经高亮的图层则销毁,通过initHighLtLayer()重建要高亮显示的新图层
if(highLtLayer) {
highLtLayer.destroy();
}
//初始化高亮图层
initHighLtLayer();
// 高亮显示
var format = new Zondy.Format.PolygonJSON();
var features = format.read(data);
highLtLayer.setVisibility(true);//将图层设为可见
highLtLayer.addFeatures(features);//将要素添加到图层中
}
</script>
</head>
<body onload="init()">
<div class="ToolLib">
<input type="button" class="ButtonLib" value="开始查询" onclick="startQuery()"/>
</div>
<div id="map1"></div>
<aside id="resultTable">
</aside>
</body>
</html>
3.效果
Paste_Image.png
在点击查询下一个点时,清除之前高亮的图层和json,并重新显示新的数据
Paste_Image.png
