Question

url_closestService=host+
"transportationAnalystzhongyuan/rest/networkanalyst/Net_way_province@zhongyuan";
function findClosestFacilities(eventPoint) {
	drawCandidatePoint.deactivate();
	if(!eventPoint){
		alert("请选择事件点！");
		return;
	}
	var findClosestFacilitiesService, parameter, analystParameter, resultSetting;
	resultSetting = new SuperMap.REST.TransportationAnalystResultSetting({
		returnEdgeFeatures: true,
		returnEdgeGeometry: true,
		returnEdgeIDs: true,
		returnNodeFeatures: true,
		returnNodeGeometry: true,
		returnNodeIDs: true,
		returnPathGuides: true,
		returnRoutes: true
	});
	
	var weightFieldName = "SmLength";
	analystParameter = new SuperMap.REST.TransportationAnalystParameter({
		resultSetting: resultSetting,
		weightFieldName : weightFieldName
	});
	parameter = new SuperMap.REST.FindClosestFacilitiesParameters({
		event: eventPoint,
		expectFacilityCount: 1,
		isAnalyzeById: false,
		facilities: facilityPoints,
		parameter: analystParameter
	});
	findClosestFacilitiesService = new SuperMap.REST.FindClosestFacilitiesService(url_closestService, {
		eventListeners: { "processCompleted": processCompleted }
	});
	findClosestFacilitiesService.processAsync(parameter);
}
function processCompleted(findClosestFacilitiesEventArgs) {
	
	var result = findClosestFacilitiesEventArgs.result;
	var features = [];
	alert(result.facilityPathList);
	if (result.facilityPathList) {
		for (var i = 0, facilityPathList = result.facilityPathList, len = facilityPathList.length; i < len; i++) {
			var feature = new SuperMap.Feature.Vector();
			feature.geometry = facilityPathList[i].route;
			feature.style = style;
			features.push(feature);
		}
	}
	closestLayer.addFeatures(features);
}

事件点和设施点都是不为空的Point数组（经纬度）；

网络数据集描述：

权重名称:	SmLength
转向权重字段名称:
投影坐标系名称:	Longitude / Latitude Coordinate System---GCS_WGS_1984
投影坐标系类型:	PCS_EARTH_LONGITUDE_LATITUDE
距离（长度）单位:	METER
坐标单位:	DEGREE
投影方式的名称:	null
投影坐标系的地理坐标系的名称:	GCS_WGS_1984
投影坐标系的地理坐标系的类型:	GCS_WGS_1984
投影坐标系的地理坐标系的空间参照类型:	SPATIALREF_EARTH_LONGITUDE_LATITUDE
投影坐标系的地理坐标系的大地参照系类型:	DATUM_WGS_1984

网络数据集所有字段名称：

SmID

SmSdriW

SmSdriN

SmSdriE

SmSdriS

SmUserID

SmResistanceA

SmResistanceB

SmLength

SmTopoError

SmFNode

SmTNode

SmEdgeID

SmGeometrySize

SmGeoPosition

Field_SmUserID

NAME

CLASS

ID1

Z

Field_SmUserID_1

然而从服务器返回的结果是：

SuperMap.Util.RequestJSONP.supermap_callbacks[38966677173507820]({"facilityPathList":null},200)

Answer 1

你好：

最近设施分析返回结果为空，你需要检查以下两方面：

1、用同样的数据在iDesktop中进行最近设置分析，查看是否能正确返回结果。如果可以，则可以排查数据的问题。

2、检查该交通网络分析服务的服务提供者-高级设置，增大容限。

3、如果以上两个可能都排除了，还是需要进一步检查一下代码了。

Comments

数据本身的问题，多谢！