在ArcGIS Engine开发环境中,使用C#语言进行最短路径分析中添加需要进行最短路径分析的地图数据和网络数据集
时间: 2024-04-24 17:22:36 浏览: 114
要在ArcGIS Engine开发环境中使用C#语言进行最短路径分析,需要先添加需要进行最短路径分析的地图数据和网络数据集。具体步骤如下:
1. 打开ArcGIS Engine开发环境,创建一个新的ArcGIS Engine项目。
2. 在项目中添加需要进行最短路径分析的地图数据和网络数据集。可以通过以下步骤实现:
a. 在“解决方案资源管理器”中右键单击“图层”或“数据库连接”,选择“添加数据”。
b. 在“添加数据”对话框中,选择需要添加的地图数据和网络数据集,然后单击“添加”按钮。
3. 在代码中使用C#语言调用ArcGIS Engine提供的最短路径分析工具,对已添加的网络数据集进行分析,得到最短路径结果。
注意,添加的地图数据和网络数据集需要与代码中使用的路径一致,否则会导致程序运行出错。同时,最短路径分析工具的使用需要对ArcGIS Engine开发环境和C#语言有一定的了解。
相关问题
AE+C#最短路径分析
在ArcGIS Engine开发环境中,使用C#语言进行最短路径分析,可以按照以下步骤进行:
1. 创建一个新的ArcGIS Engine工程。
2. 添加需要进行最短路径分析的地图数据和网络数据集。
3. 在Visual Studio中创建一个新的Windows Form应用程序。
4. 在Form窗口中添加地图控件,用于显示地图数据。
5. 在代码中创建一个NetworkAnalyst对象,并设置其参数,包括起点、终点、分析方式等。
6. 调用NetworkAnalyst对象的Solve方法进行最短路径分析。
7. 获取分析结果,包括最短路径、路径长度、路径节点等,并在地图上绘制最短路径。
8. 编译和运行程序,测试最短路径分析的功能。
下面是一个示例代码,用于进行最短路径分析:
```csharp
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.NetworkAnalyst;
using ESRI.ArcGIS.SystemUI;
namespace shortestPath
{
public partial class Form1 : Form
{
private IMap m_map = null;
private IEngineNetworkAnalystEnvironment m_naEnv = null;
private INetworkDataset m_networkDataset = null;
private IEngineNetworkAnalyst m_naSolver = null;
private INALayer m_naLayer = null;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
//获取MapControl控件的IMap对象
m_map = axMapControl1.Map;
//创建EngineNetworkAnalystEnvironment对象
m_naEnv = new EngineNetworkAnalystEnvironmentClass();
//加载NetworkDataset
string ndsPath = @"C:\data\network\MyNetworkDataset.nds";
m_networkDataset = m_naEnv.CreateNetworkDataset(ndsPath);
//创建EngineNetworkAnalyst对象
m_naSolver = new EngineNetworkAnalystClass();
m_naSolver.NetworkDataset = m_networkDataset;
//设置分析参数
INALayer naLayer = m_naSolver.Context.Layer;
INetworkSource networkSource = m_networkDataset.NetworkSources.get_Item(0);
INetworkDataset networkDataset = networkSource as INetworkDataset;
IPoint fromPoint = new PointClass();
fromPoint.X = 100;
fromPoint.Y = 200;
IPoint toPoint = new PointClass();
toPoint.X = 300;
toPoint.Y = 400;
INetworkElement fromElement;
INetworkElement toElement;
networkDataset.BuildNetwork(out fromElement, out toElement);
INetworkElementBarriers fromBarriers = new NetworkElementBarriersClass();
INetworkElementBarriers toBarriers = new NetworkElementBarriersClass();
INetworkAttribute2 lengthAttribute = networkDataset.get_AttributeByName("Length") as INetworkAttribute2;
m_naSolver.Context.OutSpatialReference = m_map.SpatialReference;
m_naSolver.Context.DirectionsLengthUnit = esriNetworkAttributeUnits.esriNAUMiles;
m_naSolver.Context.UseHierarchy = false;
m_naSolver.Context.FindBestOrder = true;
m_naSolver.Context.PreserveFirstStop = true;
m_naSolver.Context.PreserveLastStop = true;
m_naSolver.Context.UseTimeWindows = false;
m_naSolver.Context.UseStartTime = false;
m_naSolver.Context.UseHierarchy = true;
m_naSolver.Context.HierarchyWeight = 0.7;
m_naSolver.Context.TravelDirection = esriNetworkTravelDirection.esriNTDAgainstFlow;
m_naSolver.Context.ImpedanceAttributeName = lengthAttribute.Name;
m_naSolver.Context.FromPoint = fromPoint;
m_naSolver.Context.ToPoint = toPoint;
m_naSolver.Context.FromElement = fromElement;
m_naSolver.Context.ToElement = toElement;
m_naSolver.Context.FromPointBarrierElements = fromBarriers;
m_naSolver.Context.ToPointBarrierElements = toBarriers;
//解决最短路径问题
m_naSolver.Solve(m_naSolver.Context, ref naLayer, null);
//获取分析结果
m_naLayer = naLayer as INALayer;
IRouteResult routeResult = m_naLayer.Context.Result as IRouteResult;
IGeometry geometry = routeResult.Route.ShapeCopy;
double length = geometry.Length;
//在地图上绘制最短路径
IFeatureLayer featureLayer = m_naLayer as IFeatureLayer;
IFeatureClass featureClass = featureLayer.FeatureClass;
IFeature feature = featureClass.GetFeature(0);
IFeatureSelection featureSelection = featureLayer as IFeatureSelection;
featureSelection.Clear();
featureSelection.Add(feature);
//刷新地图
axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewAll, null, null);
}
}
}
```
希望这个示例代码能够对你有所帮助!
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