二维爆管分析

作者: SuperMap技术控 | 来源:发表于2022-01-05 10:50 被阅读0次

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实验五、二维图形的几何变换

> 作者：LX

一、背景

前面的文章《二维地图展示爆管分析》中介绍了三维爆管分析，但是很多小伙伴不清楚如何实现二维爆管分析，下面就详细的介绍一下二维爆管分析实现流程。

二、数据准备

网络数据集准备，网络数据集需要在idesktop中构建，详细的构网步骤请参考idesktop帮助文档中“构建网络数据”中的介绍。
本文用到的网络数据可在文末下载。

三、网络分析服务发布

1、到iServer服务管理界面，选择“快速发布服务”，数据来源选择“工作空间”

2、工作空间类型选择“文件型”，工作空间路径点击“远程浏览”，找到实际工作空间文件存放的位置

3、发布的服务类型选择“交通网络分析服务”

4、配置交通网络分析参数

5、点击“完成”，发布服务成功，直接点击服务链接即可访问服务。

6、修改服务配置文件
打开【iServer根目录】/ webapps/iserver/WEB-INF下的iserver-services.xml找到发布的交通网络分析服务的服务提供者，把initFacilityAnalyest节点改成true，然后添加directionField字段。如下图所示：

PS：
initFacilityAnalyest：是否初始化设施网络分析，默认为false。修改为true后，将开启爆管分析、上下游关键设施查找分析功能。directionField：流向字段，当initFacilityAnalyst为true时，该参数必填。

四、代码实现

1、定义底图

//初始化图层
layer = new SuperMap.Layer.TiledDynamicRESTLayer("map", url, {transparent: true, cacheEnabled: true},{maxResolution:"auto"});

2、指定设施点并显示在地图上，本例中设施点就是阀门

//指定设施点ID数组
var sourceNodeIDs = [1,10,20,29,30,40,51,53,55,57,66,79];
//通过ID查询设施点
function addvalve(){
var valve="(";
for(var i=0;i<sourceNodeIDs.length;i++){
if(i!=sourceNodeIDs.length-1){
valve+=sourceNodeIDs[i]+",";
}
else{
valve+=sourceNodeIDs[i]+")";
}
}
var valvequeryParam,valvequeryBySQLParams,valvequeryBySQLService;
valvequeryParam=new SuperMap.REST.FilterParameter({
name: "burstdata_Network_Node@burstdata",
attributeFilter: "SmNodeID in "+valve
});
valvequeryBySQLParams = new SuperMap.REST.QueryBySQLParameters({
queryParams: [valvequeryParam],
});
valvequeryBySQLService = new SuperMap.REST.QueryBySQLService(url, {
eventListeners: {"processCompleted": valveprocessCompleted, "processFailed": processFailed}});
valvequeryBySQLService.processAsync(valvequeryBySQLParams);
}
//将设施点显示在地图上
function valveprocessCompleted(e){
var valvepoint=[],features=e.result.recordsets[0].features;
for(var i=0;i<features.length;i++){
valvegeo=features[i].geometry;
var valvepointVector = new SuperMap.Feature.Vector(valvegeo);
valvepointVector.style = {
fillColor: "SteelBlue ",
pointRadius: 6,
label:"阀门",
fontWeight:"bold",
labelXOffset:-20,
fontColor:"SteelBlue "
};
valvepoint.push(valvepointVector);
}
vectorLayer2.addFeatures(valvepoint);
}

显示的阀门位置如下：

3、确定爆管位置，通过画点控件画的点位来模拟爆管的位置

//画点控件
drawPoint = new SuperMap.Control.DrawFeature(vectorLayer, SuperMap.Handler.Point);
drawPoint.events.on({"featureadded": drawPointCompleted});
map.addControl(drawPoint);
//选择爆管位置成功
function drawPointCompleted(drawGeometryArgs) {
drawPoint.deactivate();
var feature = new SuperMap.Feature.Vector();
feature.geometry = drawGeometryArgs.feature.geometry,
feature.style = {};
vectorLayer.addFeatures(feature);
//查询爆管位置所在的弧段
var queryParam, queryByGeometryParameters, queryService;
queryParam = new SuperMap.REST.FilterParameter({name: "burstdata_Network@burstdata"});
queryByGeometryParameters = new SuperMap.REST.QueryByDistanceParameters({
queryParams: [queryParam],
isNearest:true, //选择最近查询，并且只返回一个
expectCount:1,
geometry: drawGeometryArgs.feature.geometry,
distance:100
});
queryService = new SuperMap.REST.QueryByDistanceService(url, {
eventListeners: {
"processCompleted": processCompleted_select,
"processFailed": processFailed
}
});
queryService.processAsync(queryByGeometryParameters);
}
//地图上显示爆管位置
function processCompleted_select(queryEventArgs) {
drawPoint.deactivate();
var i, j, result = queryEventArgs.result;
if (result && result.recordsets) {
recordsets=result.recordsets;
var feature = recordsets[0].features[0];
feature.style = style;
vectorLayer.addFeatures(feature);
var center=feature.geometry.getBounds().getCenterLonLat();
var point=new SuperMap.Geometry.Point(center.lon,center.lat);
var BPpoint=new SuperMap.Feature.Vector();
BPpoint.geometry=point;
BPpoint.style={
fillColor: "red",
pointRadius: 6,
};
vectorLayer1.addFeatures(BPpoint);
BP=feature.data.SmID;
alert("爆管点："+BP);
}
}

爆管位置：

4、设定爆管分析参数

var parameter = new SuperMap.REST.BurstPipelineAnalystParameters({
sourceNodeIDs: sourceNodeIDs, //设施点ID数组
edgeID: BP, //爆管弧段ID，既查询弧段内容
nodeID: null, //爆管结点ID （注：edgeID 与 nodeID 不能同时使用）
isUncertainDirectionValid: true //指定不确定流向是否有效
});

5、执行分析

var burstPipelineAnalystService = new SuperMap.REST.BurstPipelineAnalystService(analysisServiceurl,{
eventListeners: {"processCompleted": BurstPipelineAnalyst_processCompleted}

});
burstPipelineAnalystService.processAsync(parameter);

6、获取分析结果，找到受影响的位置并显示在地图上

//爆管分析成功
function BurstPipelineAnalyst_processCompleted(BurstPipelineAnalystEventArgs) {
var result = BurstPipelineAnalystEventArgs.result;
//上下游中受爆管位置影响的弧段ID
var edgeID = result.edges;
//爆管分析中受爆管位置影响的上下游的关键设施点ID
var criticalNodes = result.criticalNodes;
queryBySQL(criticalNodes,edgeID);
}
//通过受影响的弧段和关键设施点ID查询到对应的对象
function queryBySQL(criticalNodes,edgeID){
var queryParam,queryParam2, queryBySQLParams, queryBySQLService;
queryParam = new SuperMap.REST.FilterParameter({
name: "burstdata_Network_Node@burstdata",
attributeFilter: "SmNodeID in ("+criticalNodes+ ")"
});
var str="(";
for(var i=0;i<edgeID.length;i++){
if(i!=edgeID.length-1){
str+=edgeID[i]+",";
}
else{
str+=edgeID[i]+")";
}
}
queryParam2=new SuperMap.REST.FilterParameter({
name: "burstdata_Network@burstdata",
attributeFilter: "SMID in "+str
});
queryBySQLParams = new SuperMap.REST.QueryBySQLParameters({
queryParams: [queryParam,queryParam2],
});
queryBySQLService = new SuperMap.REST.QueryBySQLService(url, {
eventListeners: {"processCompleted": processCompleted, "processFailed": processFailed}});
queryBySQLService.processAsync(queryBySQLParams);

}

function processCompleted(queryEventArgs) {
var i, j,affectedPoint=[],affectedLine=[],result = queryEventArgs.result;
if (result && result.recordsets) {
//受影响的设施点
if(result.recordsets[0].features){
for(i=0;i<result.recordsets[0].features.length;i++){
affectedgeo=result.recordsets[0].features[i].geometry;
var affectedPointvector=new SuperMap.Feature.Vector();
affectedPointvector.geometry=affectedgeo;
affectedPointvector.style={
fillColor: "Yellow",
pointRadius: 6
};

affectedPoint.push(affectedPointvector);
}

vectorLayer.addFeatures(affectedPoint);
}
//受影响的弧段
if(result.recordsets[1].features){
for(j=0;j<result.recordsets[1].features.length;j++){
var affectedLinefea=result.recordsets[1].features[j];
affectedLinefea.style={
strokeColor:"red",
strokeWidth:3
}
affectedLine.push(affectedLinefea);
}
vectorLayer.addFeatures(affectedLine);
}
}
}